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IRRA® rules questions & answers


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#1 IRRAŽ Retro Racing

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Posted 19 November 2007 - 02:44 PM

Q: Drilled hub rear tires are not allowed. I understand the intent of this is probably to eliminate the more expensive, higher performance tires. However, there are tires that have holes or slots primarily for realism, e.g. Pro-Track. Are these also disallowed?

A: Any type of drilled hub is not being allowed in effort to control the costs, as they are typically more expensive.

Note; drilled hubs are now allowed.

Q: Is narrowing of rear tires allowed?

A: Yes

Q: Will there be a disparity in performance between the 4002B and the other motors?

A: Based on results obtained at the Chicago race, no motor proved to be more better in performance than any other of the four motors allowed.

Q: Gluing the track by individual racers is prohibited. What about glue on the tires?

A: Glue placed on the tires would be a form of gluing the track and therefore is not allowed.

Q: Lane selection for each main is by random draw. With no qualifying, does this also apply to how racers are placed in each main?

A: Yes, typically the names will be at random or in the sequence in which a racer techs in.

Q: Will there be an incentive to move from the GT Flexi class to the scratchbuilt classes? If so, what?

A: As noted, the class is to develop basic car set-up, driving, and soldering skills. It is anticipated that with the introduction of chassis kits and the exposure to Retro Racing that these racers will get the bug like many have already.

Q: What is the procedure for submitting bodies (or other items) for consideration as approved parts?

A: The chair of the committee should be contacted regarding the item in question and will communicate to the submitter where the item is to be sent.

Q: Also WHY can't you rebuild your own Euro motor? Why do you have to use the refurbishing program?

A: All motors must be sealed, either with the original seal or that of the refurbishing program. Individual motor work is not being allowed.

Q: And why are you allowing Flexi front ends like the East Coast series? Are you just using the tongue portion or can you the whole front end including the wing tips?

A: Only the tongue portion is allowed within the limits set and only up to January 1, 2009. After that they will not be allowed.

Q: ... isn't this just another spin-off of D3, although I do like the body list.

A. Our aim was to be as inclusive as possible for all regions and the rules represent the consensus of what the larger retro racing community wanted. Again, as stated, these rules were developed after a careful review of all of the regional D3 and Retro rules and are for national competition. Should a region wish to adopt them, that's fine but they do not have to change their current rules.

 

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells





#2 IRRAŽ Retro Racing

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Posted 20 November 2007 - 08:42 AM

Q: Can a rectangular brass tube be used for pin tubes instead of a square tube provided the movement of the pin tubes is in the same direction, or in place of, the pan movement provided the movement is either up and down or front to back?

A: This is covered under Chassis-b. "Floating pin tubes inside another tube are allowed".

Q: Do the rear tires have to be covered by the body or can they be revealed provided the axle tube is not showing?

A: For Can-Am, Coupe GT, and GT Flexi, under a. Body Style "No part of the chassis may be seen when looking down on the car from above." The wheels and tires are considered part of the chassis under this regulation.

This requirement is not part of the F1 body rules.

 

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#3 IRRAŽ Retro Racing

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Posted 21 November 2007 - 08:23 AM

Q: When a 4002 or 4002B motor is sent to be refurbished, what services will be performed?

A: The comm is trued and the arm is rebalanced, the magnets are zapped, the arm is spaced, brush hood alignment performed, bushings replaced as needed, new brushes and springs are installed, four can-to-endbell screws are added, motor is resealed, and the motor is run-in on power supply.

Q: Will endbell blueprinting, as long as the seal is left intact, be allowed by the motor owner?

A: Yes, as long as the seal remains intact and the hoods are not moved from the stock location to alter the hood timing.

Q: For the Flexi division, will the Cheetah 11 and new Pro Slot FX frame be allowed?

A: Yes.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#4 IRRAŽ Retro Racing

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Posted 21 November 2007 - 03:16 PM

Q: How many of the above IRRA® group actually vote or decide on the rules and decide on the replies being made to the questions?

A: The five board members review the questions and formulate the answers and others within the group provide input and insight.

Q: Also will there be membership fees besides entry fees required at events or to be a yearly member of the IRRA®?

A: There are no fees besides entry fees and the IRRA™ does not collect dues nor offer memberships at this time.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#5 IRRAŽ Retro Racing

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Posted 21 November 2007 - 09:44 PM

Q: I didn't see bronze, silicone bronze, steel gas welding rod, or stainless steel gas welding rod listed as a frame building material. Are these materials to be considered as not legal?

A: For the purposes of chassis construction material, all bronze rod is considered to be brass rod and thus is allowed. Any type of steel rod is allowed. Please note that "spring steel" sheet is specifically prohibited.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#6 IRRAŽ Retro Racing

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Posted 24 November 2007 - 11:00 AM

Q. "... a chassis may have transverse hinges (examples: Iso-fulcrum hinges and plumber hinges)... "
Is that Iso-fulcrum as in the old Cox LaCucaracha?


A. Yes, it is.

Q. As a follow-up to Jim Regan's question, how "loose" can a hinge be? As an example, can .047" or .055" be used in 3/32" tubing?

A. There is no limit to the amount of float in hinges or the floating pin tubes. However in no case shall the amount of float be in excess of any of the allowed measurements, such as width.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#7 IRRAŽ Retro Racing

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Posted 25 November 2007 - 10:44 AM

Q: ... so the chassis Mike shows is deemed illegal per IRRA® rules or is it not?

A: The chassis pictured by Mike Swiss in post #47 is legal in the IRRA® Can-Am/Coupe GT classes.

(Posted for the IRRA® BoD by Richard L. Hofer)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#8 IRRAŽ Retro Racing

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Posted 25 November 2007 - 12:51 PM

Q. Maximum body height is 1.375", and a half-inch spoiler is allowed above that. If the actual body height is below the maximum, can the spoiler be a little longer to make up the difference, or would this be an improper use of air control devices?

A. The spoiler dimensions are independent of the body dimensions. Therefore, the spoiler cannot be larger than a 1/2 inch high regardless of high the body is.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#9 IRRAŽ Retro Racing

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Posted 08 January 2008 - 09:10 AM

Q: Can the front axle supports be attached to the nosepiece or the pans?

A: Yes, they can.

Q: I have a Can-Am body without a molded-in driver. According to my interpretation of the rules, I cannot leave the area over the cockpit clear, and just make a hole for the drivers head, right? I have to cut out that whole piece, thereby destroying what little aero the body has to offer, correct?

A: Correct. The complete section of the non-window area must be removed. No hole in the area for just a driver's head to appear.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#10 IRRAŽ Retro Racing

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Posted 21 January 2008 - 10:31 AM

Q: Rick posed a question as to whether the chassis shown at the link below would be legal under IRRA® rules.

Rick's Chassis


A: There's nothing in the IRRA® rules that would outlaw what Rick has built as long as it is complies with the width and clearance rules.

It's difficult to pronounce on the legality of a frame on its own, as there are lots of other requirements that apply to the whole car that cannot be seen on the frame. For example, if any part of that rail on the outside of the wheels is visible from above the body the car would not be legal.

It is felt that the frame is not within the spirit of the rules, as this type of chassis was not run in the period and the front wheels/tires should be completely visible. At this time the IRRA® board feels it cannot determine the legality of a car using that frame until the Tech Inspector has passed it at the event.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#11 IRRAŽ Retro Racing

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Posted 18 February 2008 - 02:36 PM

Q: Can a builder use .047" or .055" wire inside of 3/32" tubing for plumber hinges?

A: The 2008 IRRA® Rules do not require that hinges (plumber or otherwise) feature hinge pins of a size matching the hinge tube's ID, so the answer to the specific question above is yes.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#12 IRRAŽ Retro Racing

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Posted 26 February 2008 - 04:31 PM

Q: I have a question on the wing on the Ti22 Mk1. This car was raced at Riverside in winter of '69... If it were built in scale and well-attached, could it be used with the 1/2 inch add-on spoiler?

A: If the high-mounted wing is firmly attached and a reasonably scale representation of the 1:1 car's wing, then the answer is yes, as it is felt that the wing itself will not provide a performance advantage.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#13 IRRAŽ Retro Racing

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Posted 03 April 2008 - 01:12 PM

Q: Can the back end of a Womp or Sprints Plus chassis be used and would this be considered a three-sided motor bracket even if the sides meet at the bottom of the motor bracket on these chassis?

A: IRRA® will be revising the bracket requirement rule in this manner: ""Each car must have a brass rear bracket consisting of at least three sides (vertical or horizontal), with each connected side having a minimum width or height of at least .200". Under this restriction, a cut-off brass Womp piece would be allowed.

Q: There is nowhere in the rules that states that cut lines have to be observed. I assume that as long as the front and rear dimensions are adhered to all will be OK. What do you mean by excessive rake? You already have a .035" chassis rake with minimum tire. Oh, and by the way, if anyone is interested the Norris Industries Ti22 was run with no body material in front of the front winglets. Cutting this body to realistic dimensions would create a rake. Since there is no minimum height restriction can this body be mounted as low as possible?

A: The body can be mounted as low as desired if the wheels are proportional to the correct wheel openings and if the front and rear dimensions are observed. Excessive rake is when the the body is mounted such that the rear is very high and the front so low that the front portion of the body has to be excessively trimmed, typically removing the grill area on most bodies. For the Ti22 it would essentially eliminate most of the front part of the body.

Q: The IRRA® rules require that "Bodies must be presentably-painted."

A: To further clarify this regulation, all bodies must be fully opaque on all sides except for those areas deemed to be windows. Windows can be tinted as they often are on real cars. The term opaque means covered by paint, tape, or other suitable material such that a finger is not visible through the paint or other covering under normal lighting.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#14 IRRAŽ Retro Racing

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Posted 03 April 2008 - 01:15 PM

Q: Would the pictured chassis be allowed under IRRA® rules?

chassisA.jpg

A: Based solely on the picture, the IRRA® board believes this chassis utilizes a "centerline hinge" and as such would not be allowed under the IRRA® rules.

If two tightly-fastened screws were present so that there was no left to right movement and so that the rear section only flexed with the rails, rather than hinging around the screws, this chassis would be allowed in IRRA® competition.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#15 IRRAŽ Retro Racing

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Posted 03 April 2008 - 03:03 PM

Q: Regarding the ruling given in post #14 of the "IRRA Rule Questions & Answers" thread, in my estimation this is not a hinge at all. This is a pivot. Please clarify the differences.

A: As far as the IRRA® board can tell from the posted photograph, the rear section of this frame is free to rotate left to right around the pivot point of the screw. This makes the screw part of a hinge in the same way a piece of piano wire would be the pivot in a hinge that has a piece of tubing rotating on the wire (or vice versa).

So, the direct answer is that there is no difference between a hinge and a pivot.

(Posted for the IRRA® BoD by Dennis Samson)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#16 IRRAŽ Retro Racing

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Posted 07 April 2008 - 03:24 PM

Q: What is considered a centerline hinge?

A: Any hinge where the rotation axis of the hinge is located on the center line of the frame is a centerline hinge.

Many Eurosport frames have a hinge running on the centerline of the frame from rear to front - that is not allowed, nor is a vertically-oriented hinge like the one discussed above.

(Posted for the IRRA® BoD by Dennis Samson)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#17 IRRAŽ Retro Racing

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Posted 02 May 2008 - 10:21 AM

Q: So if I built a chassis exactly like TonyP's, but I cut the pans out in the aero areas, and replaced those sections with aero-shaped Lexan pieces, that would be legal?

Or say I replaced the entire aero pan in Tony's chassis with Lexan, would that also be legal?

Or enclosed the entire bottom of the car with Lexan, is that legal?


A: Lexan is not on the list of approved materials for chassis construction. However there is no regulation that prohibits its use on a chassis in a non-structural manner. Constructing chassis pans from Lexan would probably not be legal, as pans normally are structural components.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#18 IRRAŽ Retro Racing

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Posted 19 May 2008 - 03:38 PM

At the recent race in Tom Thumb in Columbus, OH, which was run under IRRA® rules, the following F1 chassis was allowed to compete one time only but it will not be legal to run again.

F1_1A.jpg

F1_2A.jpg

However, it needs to be noted that the front end design of this F1 chassis is not in compliance with the IRRA® chassis rules for the F1 class. Here is the relevant section of the current IRRA® rules:

"k. Maximum chassis width excluding axle tubes and axles: 1-5/8" (41.28mm). A realistic suspension representation may be allowed to exceed the maximum chassis width rule if the suspension members are a minimum of 0.050" (1.27mm) above the tech block surface at all points and do not have any non-suspension parts (i.e. chassis pans, hinges, etc.) attached to them."

(Posted for the IRRA® BoD by Ron Hershman)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#19 IRRAŽ Retro Racing

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Posted 21 May 2008 - 07:06 AM

Q: At what point on the chassis does the .050" clearance end? Gear side of axle bracket or motor side of axle bracket?

A: It ends on the motor side of the bracket. Please note that the following section also defines parameters:

f. No part of the chassis, motor, gear, or other component may hang below the main chassis rail(s), which may not be bent or bowed vertically for the purpose of lowering the midsection of the frame below the level dictated by the clearance specifications.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#20 IRRAŽ Retro Racing

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Posted 15 August 2008 - 02:48 PM

The following has been presented to the board regarding the JK Spec Class:

Q: Can the main rail be cut in the U to make the bracket easier to fit?

A: Yes, it can be. The chassis must stay a monorail. The rails must be soldered in the original slot location and stay straight and parallel to the motor (up to the bracket). The U section does not have to be used.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#21 IRRAŽ Retro Racing

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Posted 18 August 2008 - 03:01 PM

Q: At a recent race, during each lane change, one driver took his car to his pit box, did his normal maintenance, then ran his tires across a glue board. He returned to the track and ran the tires on the track in the braking zone of the deadman on his lane, leaving two visible glue lines in the braking zone about 6 inches long. Is this allowed under the IRRA® rules?

A: No, this practice is not allowed under IRRA® regs, which currently state: "Drivers are prohibited from gluing the track before or during any races." Additional wording will be added at the next rules revision to specifically state the procedure mentioned above is not allowed.

(Posted for the IRRA™ Board by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#22 IRRAŽ Retro Racing

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Posted 18 August 2008 - 03:57 PM

The JK Spec Class is intended for those new to scratchbuilding and/or race competition. The JK Spec class is for non-expert/non-pro racers and eligibility for the class will be determined as follows:


  • For large IRRA® events it is up to the organizer and/or raceway owner
  • For local events it is up to the regional director/board
  • The criteria that will be used to determine eligibility for entrance is to be announced well in advance of the event.

An example of the criteria that could be used nationally as well as regionally is that those racers having had a podium position in any other scratchbuilt class during the prior 12 months would be ineligible to run in the JK Spec Class.

This information has also been posted to the IRRA® website.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#23 IRRAŽ Retro Racing

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Posted 25 August 2008 - 12:08 PM

Q: First, can we use axle bushings instead of tubing in the front uprights for the axles?

A: Yes.

Q: Can the position of the axle height be modified for .050" front track clearance?

A: Yes.

Q: Also, since the rules state either the standard or hypoid motor bracket may be used, can we modify the standard bracket if that is what was in the kit, to accept the hypoid setup?

A: No.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#24 IRRAŽ Retro Racing

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Posted 25 August 2008 - 02:31 PM

Q: Why weren't all the classes changed to .050" clearance?

A: We had input from several raceway owners wanting to raise the clearance due to conditions at their tracks or to ease tech inspection. While it could be easier to have just changed all the classes (except perhaps GT Flexi) to the same front end clearance spec, we felt that there were many, many cars already built to the existing specs for Can-Am, GT, and F1 and to change it would place an undue burden and perhaps cost on our fellow racers. Someone who has good chassis building experience would probably not find this a problem but others might. Also, there are a number of commercial chassis with the .015" front clearance.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#25 IRRAŽ Retro Racing

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Posted 02 September 2008 - 01:37 PM

Q: On the last two JK Spec chassis that I built, the chassis as provided, uncut, measures 3.140" wide across the width of the pans at the rear. Since it is within the rules to run the car without cutting the pans off for hinging, is it then OK to file or sand the outer edges of the pan to satisfy the width rule of 3.125" or will this be overlooked?

A: Filing and/or sanding the uncut JK Spec main chassis plate to reduce width to the specified 3.125" specification will be allowed.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#26 IRRAŽ Retro Racing

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Posted 02 September 2008 - 02:26 PM

Q: Will inline frames be allowed to compete in the new IRRA® anglewinder class?

A: No. Just as Anglewinders and full Sidewinders are not allowed in the Inline classes, Inlines and full Sidewinders are not allowed in the Retro Anglewinder Class.

Of course, what might be allowed at any individual raceway for a local race is beyond the control of the IRRA® Board, but our position is that these drive configurations should not be mixed.

(Posted for the IRRA® BoD by Dennis Samson)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#27 IRRAŽ Retro Racing

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Posted 13 September 2008 - 07:21 AM

Q: The JK Spec rules say that the axle tube must pass through the motor bracket. Do I have to use axle tubes or may I place the bushings directly in the mounting holes in the bracket?

A: Rear axle bushings may be soldered directly to the motor bracket without the use of axle tubes, if desired, and minor reaming of the holes in the motor bracket to allow the installation of axle bushings in this manner will be permitted.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#28 IRRAŽ Retro Racing

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Posted 17 September 2008 - 01:25 PM

Q: Can the windows be cut out of the body in the Retro Stock Car Class?

A: While it may be realistic in some cases, it has been decided that in the interest of keeping things simple for the racer and for the safety of marshals, the removal of windows from these bodies will not be allowed.

Q: How will clearance be checked for cars with drop arms since they will drop down if placed on a test block on all four wheels without the guide.

A: Cars with drop arms will/should be tech'd on a test block having a guide area that is typical of the depth of the track for the race where the car can be placed on the block with the guide in and the four wheels touching. For example, at the Sano, any cars having drop arms will have the clearance checked on a Backtrack guide block that has multiple depths. It is anticipated that the .015" guide slot will be used there as this is announced braid depth for the race. Other regions should be prepared to do the same thing and ensure racers are aware of the braid depth prior to a race.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#29 IRRAŽ Retro Racing

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Posted 22 September 2008 - 03:18 PM

Q: I have two sets of front tires/wheels from two different manufacturers that claim 5/8" diameter, however both sets are smaller than 5/8" diameter. This apears to be the accepted manufacturing standard but by the letter of the rules, these wheels are not legal.

A: It is a well-known fact that the 5/8" front wheels from one prolific slot car parts manufacturer typically measure quite a bit smaller than 0.625". The USRA revised their rules to spec .600' diameter front wheels some years ago and after discussion, it has been decided to implement the same standard in the IRRA® rules.

Note that the revised 0.600" diameter specification ONLY applies to O-ring fronts used in the Flexi GT class.

The IRRA® rule set will NOT be revised simply to make this minor change; however the specification is applicable immediately and will be incorporated into the IRRA® rules during the next revision.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#30 IRRAŽ Retro Racing

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Posted 13 November 2008 - 12:11 PM

Q: When building an Iso chassis, is it permissable to use a transverse hinge to allow movement of a solid front axle independent of the main chassis rails?

For clarity's sake, here's an example of a chassis with that style of movement, built by Keith Van Atta.

Iso Chassis


A: The applicable regulation from the IRRA® rules is:

"Hinged Movements: Other than a drop arm, all hinged movements must be oriented in only one direction on any individual chassis. A chassis may have transverse hinges (examples: Iso-fulcrum hinges and plumber hinges) OR it may have longitudinal hinges (example: side pan hinges) but the chassis may not have both types. The number of individual hinges is not restricted."

In the chassis shown, the plumber and the Iso hinges are oriented in the same direction. The plumber rails could have side pans solidly attached but cannot have side pans hinged from them, as that would constitute hinging in a second direction, which is not allowed.

Keep in mind that the front wheels must support the front of the chassis at or above the mandated front clearance.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#31 IRRAŽ Retro Racing

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Posted 04 December 2008 - 04:45 PM

Q: I have a question on the bracket of a JK Spec Chassis. What does "minimal trimming or notching to facilitate chassis assembly" actually allow? I have a standard bracket and cannot decide how to use it. Can you attach the motor and then trim the bottom of the bracket at the motor area to let the motor drop on the endbell end, so as to lower the CG, but maintain the gear mesh? The trimming would be the side of the bracket that the motor is attached, and the sides near the motor. The motor will not be perpendicular to the track, just slightly angled. The motor would remain in the unchanged mounting holes.

If this is not legal, can the bracket be trimmed to drop the motor to the location if a hypoid bracket was used?


A: According to the JK Spec class rules:

"The motor bracket must be used as-is, in unaltered shape and form, but minimal trimming or notching to facilitate chassis assembly or to accommodate bracing is permitted."

The IRRA® Board's opinion is that the modifications described are in excess of what is allowed in the rule, as the trimming would change the position of the motor in the chassis from the stock position and the lowering of the holes would change the position of the motor in the bracket.
These modifications will therefore not be allowed for the JK Spec class, but are of course legal for cars entered in Can-Am or Coupe classes. The use of the JK hypoid bracket (also in unmodified form) is legal for the JK Spec class, so this provides an alternative to the process requested.

(Posted for the IRRA® BoD by Dennis Samson)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#32 IRRAŽ Retro Racing

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Posted 30 January 2009 - 08:27 AM

Q: There seems to be a conflict with the wheelbase rule for Retro Stock Car and rule 19 requiring the centering of the wheels in the wheel arches.

A: Correct, as we have learned that with certain approved bodies it is not possible to meet both of these requirements. Therefore, for clarification purposes, the word "Minimum" has been added to the 4.50" wheelbase requirement. This will align it properly with rule 19 that requires the centering of the wheels in the wheel arches. The guide lead requirement of .750" Maximum remains the same.

The IRRA® website has been updated noting this.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#33 IRRAŽ Retro Racing

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Posted 30 January 2009 - 01:08 PM

Q: Now that January 1, 2009 has past, will there be a rule change on the use of Flexi guide tongues?

A: We will post the following on the IRRA® website today:
"As a reminder please note that steel tongues cut from the Flexi chassis are no longer allowed in the Can-Am, F1, and GT Coupe classes where they were previously allowed up until January 1, 2009"

Q: Is a brass tongue cut from a commercial chassis (Parma Brass Kar, Brass Womp, etc.) allowed? Limits to size of piece that can be used, etc??

A:They are allowed and there are no dimensional limits in any of the scratchbuilt classes.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#34 IRRAŽ Retro Racing

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Posted 11 February 2009 - 10:52 AM

To further clarify the tire rule, the following is effective immediately and will be inserted in the appropriate sections at the next full rules revision for all classes.

"Speed Rubber is NOT allowed in IRRA® competition".

The original wording of the rule was meant to mean the same thing but it has become necessary to make this specific statement. Anyone found to be using Speed Rubber at an IRRA® sanctioned event will be banned from competing in IRRA® events in the future. Its use is extremely detrimental to other racers.


(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#35 IRRAŽ Retro Racing

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Posted 12 February 2009 - 11:45 AM

After careful review, the IRRA® BoD has determined that the following announcement on a rule change is in the best interests of those participating in racing under IRRA® rules.

Therefore, effective immediately:

No motor or tire changes will be allowed during a race except as defined below. For those races where there is a move-up from one main to another, motors and tires can be changed and the car will go through a full tech inspection.

Should a racer encounter a damaged tire/wheel (stripped screw, bent hub, or chunked tire), the racer will be afforded the opportunity to make the repair under the green and present the car to the tech inspector at the end of the heat for checking before the racer will be allowed to continue.

As a reminder, those racers making a move-up from one main to another and not choosing to change a motor or tires will still be subject to tech inspection for legal tire diameter and clearance.

The previous rule allowing motor changes under the "green" is no longer allowed.


(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#36 IRRAŽ Retro Racing

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Posted 12 February 2009 - 03:11 PM

New seal for Pro Slot sealed motors

Dan DeBella at Pro Slot is changing the tamper-resistant seal applied to the sealed Pro Slot motors approved for use in IRRA® racing.

The foil seal material previously used is being replaced with a new polymeric material that is much more resistant to being removed and reinstalled.

Pro Slot has supplied sample motors for IRRA® testing and the Board is pleased to report its approval of the new seal. Motors carrying the new seal will be allowed under IRRA® rules from this date.

Please note that at some undetermined point in the future, approval for motors sealed with the old foil Pro Slot seal will be rescinded.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#37 IRRAŽ Retro Racing

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Posted 14 February 2009 - 08:11 AM

Q: Are the Slick 7 and FX Retro chassis kits legal for use in IRRA®? They are being sold as Retro chassis.

A: The FX kit was submitted as required to the members of the IRRA® Board. By a vote, the IRRA® Board has determined that the FX kit will not be allowed to run in the established classes because it does not reflect the organization's vision or the spirit of a Retro racing scratchbuilt chassis. The BoD will in the future explore the interest of its use in either a separate class within IRRA® or perhaps another organization running similar type frames.

The Slick 7 kit has not been submitted for approval and therefore should not be considered approved for use. If one is submitted as required, a full review and vote will be conducted and the results shared here on the blog and on the IRRA® website.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#38 IRRAŽ Retro Racing

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Posted 24 March 2009 - 03:12 PM

Q: Does the entire diameter of a rear tire have to meet the stated specification?

A. Yes. The tire diameter must meet or exceed the minimum specification across the entire width of the tire.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#39 IRRAŽ Retro Racing

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Posted 18 May 2009 - 10:56 AM

Q: Are silicone-coated or silicone tires IRRA®-legal?

A: No, only natural rubber foam tires are allowed. Tires made from, or coated with, silicone, urethane, or other similar compounds, may not be used in any IRRA™ class.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#40 IRRAŽ Retro Racing

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Posted 06 July 2009 - 05:38 PM

The IRRA® Board of Directors has voted to restrict permissable chassis for the IRRA® Stock Car class to centered-motor designs ONLY, beginning on January 1, 2010. Additionally, the motor bracket specification will also be revised at that time to require U-shaped motor brackets incorporating the rear axle supports.

Offset-motor chassis designs will continue to be allowed under the current IRRA® rules through December 31, 2009.

This prior notice of forthcoming revisions to the IRRA® rules is being given in order that racers can adjust their plans and chassis builds for a smoother transition to the more restrictive rules.


(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#41 IRRAŽ Retro Racing

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Posted 03 September 2009 - 02:12 PM

Q: What work, if any, is allowed to be performed on the motor prior to sending it to the refurbisher? Here are a few things I like to do to all my motors before I race them. Would you please either qualify or disqualify the proceedures.

- Deburr endbell, align hardware, and epoxy in bushing
- Straighten can and solder or epoxy bushing
- Match magnets, align and epoxy (super glue) magnets in place
- Zap the magnets
- Adjust magnet air gap and hone magnets
- Check armature resistance and cut comm to a more performance-oriented diamenter
- Have the armature stacks cut to .513" if needed


A: The IRRA® refurb program is a SEALED MOTOR refurb program. None of the procedures mentioned are allowed to be performed on a motor to be used in IRRA® racing before it is sent to be processed by an IRRA® refurb center.

Please note that there are many other non-IRRA® racing programs available where this type of motor work is allowed.

(Posted for the IRRA® BoD by Greg Wells)

IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#42 IRRAŽ Retro Racing

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Posted 21 September 2009 - 12:14 PM

The IRRA® Board of Directors has received and assessed the following submission from R-Geo for use in races using IRRA® rules:

Samurai II Pan

SamuariII.jpg

Based on our assessment of the structures and dimensions we have concluded that this chassis component can be used to make a legal IRRA® chassis for various classes (except JK Spec of course). Final determination of the legality of a completed frame is up to the person constructing it.

Any changes in this item will require another submission for assessment.

It should be noted that this is not any previously made and sold version. This is a NEW version.

(Posted for the IRRA® BoD by Joe Neumeister)

IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#43 IRRAŽ Retro Racing

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Posted 01 April 2010 - 01:32 PM

Q: I understand no glue is allowed but can tires be treated with other compounds such as Zip Grip, Sticky Fingers, etc.

A: Yes, they can but at no time can a racer use such items and leave the tires wet so that there is residue evident on the track.

To add further clarification to the Track Condition section of the General Rules, racers cannot leave any residue on the track from either braid juice or oiling of the car. Braid juice is to be used sparingly on the car's braid and is not allowed to be placed on the track's braid. Racers should not oil their cars over the track's surface or use excess amounts that can leave a residual amount on the track's surface.

It should also be noted that No Glue means No Glue at all. A previous decision was posted noting that glue boards are not allowed.

Anyone found to be in violation will be disqualified.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#44 IRRAŽ Retro Racing

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Posted 24 May 2010 - 07:03 PM

Q: Can the Chicagoland "Backagra" piece be used in build a JK Spec car?

A: No, not as configured for its intended use. While the JK Spec class does allow for strips of brass to be used within the confines of the bracket for weight/bracing, this piece would be considered taking the level of the intended simplicity of the class to a more high tech area which the BoD feels is not the intention for this class. It is also not part of the JK Kit. Now some may say strips aren't but then again neither are the pin tubes and a legal JK Spec chassis can be built by just buying the the bracket and the pan while using your own piano wire to make the main rails.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#45 IRRAŽ Retro Racing

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Posted 27 July 2010 - 11:18 AM

The IRRA® BoD recently encountered an arm from an approved motor which did not meet the winding specifications as listed in the IRRA® rules. Due to this it was decided to conduct a "spot check" of equivalent motors on the approved motor list. A selection of motors and arms was gathered from multiple sources around the country and the armatures were dewound by multiple BoD members to confirm the number of winds on each armature pole. Here are the results:

Falcon 7, six motors tested: every arm had 65 turns of wire on all three poles.

TSR, five motors tested: every arm had 65 turns of wire on all three poles.

Pro Slot 4002B (American-made), two armatures tested: every arm had 75 turns of wire on all three poles.

Pro Slot 4002 (Chinese-made), two armatures tested: every arm had 80 turns of wire on all three poles.

Therefore all the motors and arms tested during this "spot check" were found to be in compliance with the IRRA® specifications regarding the number of winds on each pole. The IRRA® BoD will continue to conduct similar winding spot checks on an infrequent schedule in the future.

(Posted for the IRRA® BoD by Greg Wells)

IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#46 IRRAŽ Retro Racing

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Posted 10 August 2010 - 12:49 PM

Please note that the following has been added to the IRRA® website in the Latest News, Decisions, and Rules section since we realize there are some new folks who may not know the old rules and wanted specific clarification.
  • 8/10/10
For clarification purposes, please note that steel tongues cut from the Flexi and wing car chassis are not considered "commercial guide tongues" and are no longer allowed in the Can-Am, F1, and GT Coupe classes where they were previously allowed up until January 1, 2009. All legal steel tongues must be purpose-built as steel tongues and meet all IRRA® measurement specifications.

(Posted for the IRRA® BoD by Joe Neumeister)

IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#47 IRRAŽ Retro Racing

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Posted 12 August 2010 - 01:33 PM

As an added point of clarification, it should be noted that the same rule noted above applies to ALL scratchbuilt classes.

(Posted for the IRRA® BoD by Joe Neumeister)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#48 IRRAŽ Retro Racing

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Posted 13 September 2010 - 01:50 PM

Q: When racing under IRRA® rules, can rear tires be cleaned and/or treated during a race or a lane change?

A: Tires may be cleaned during the race, in between heats, and during lane changes. Racers and their pit crews may only clean tires using the supplied cleaner (lighter fluid/naphtha) provided by the hosting raceway/race director/series director. The approved cleaner and supplied rag(s) that will be placed in a designated area prior to the race and tires must be cleaned in that designated area only.

Any racer transferring tire cleaner to the track surface will be disqualified.

Tire treatments such as Zip Grip, Sticky Fingers, or any other tire treatment may only be applied before the car is teched-in. No treatments will be allowed at any time after tech. The rear tires must be dry when the car is presented at tech.

Any racer or pit crew found applying tire treatments after tech, or cleaning tires with anything other than the supplied cleaner and rags, will result in racer disqualification.

(Posted for the IRRA® BoD by Greg Wells)

IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#49 IRRAŽ Retro Racing

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Posted 29 October 2010 - 02:44 PM

Rick Bennardo made the following suggestions:

Q) Allow masking, strapping, Scotch, etc., tape to be used on the bottom of any chassis from behind the front axle to the front of the motor box. No conductive tape would be permitted, e.g. lead, tin, etc.

A) Taping a damaged body to a pan to finish a heat is now permitted. The body must be repaired, and the tape removed, before the start of the next heat of racing. Otherwise, the prohibition against the use of tape of any kind on the bottom of the chassis remains in place.

Q) Permit tires changes during any race.

A) This suggestion has been logged for consideration during the next rules revision. The present rules prohibiting tire changes except in certain limited circumstances remains in place.

Q) Go back to the prior rule of allowing the cleaning of tires, with lighter fluid only using your own can of fluid. As long as no residue is left on the track.

A) This suggestion has been logged for consideration during the next rules revision.

(Posted for the IRRA® BoD by Greg Wells)


IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells


#50 IRRAŽ Retro Racing

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Posted 29 October 2010 - 02:51 PM

Due to an incident in a recent race where a racer's hand-out motor failed during his qualifying run, the IRRA® Board is adding the following regulation to the rules. This regulation goes into effect immediately and will be added to the full IRRA® ruleset when clarifications and additions since the last major rules revision are rolled in.

Should a racer's hand-out motor fail during the qualifying run or the warm-up, the racer will be given the opportunity to change to another hand-out motor without penalty, if a second hand-out motor purchased by the racer is available.

(Posted for the IRRA® BoD by Greg Wells)

IRRA® Board of Directors: Mike McMasters, Joe Neumeister, Tony Przybylowicz, Mike Swiss, Greg Wells






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