1442 replies to this topic

[Cap Henry]

Basically as long you have the minimum front bumper, not over the max height in the back, and your wheels aren't sticking through the top of your body, you're good.

[Noose]

Bingo!

[DirtyHairy]

thank you!!!!!!!!!!!!!! thats putting it in terms i dont have to think about........but please bring the stick anyways

[Noose]

Justin..youse just not bes old enough to remembers how wes used to "rake em".

[DirtyHairy]

i just have a different opinion on what "severe raking" is......what i did to that body was what i thought to be"extreme" ..............i guess i'll have to try harder next time.........thanx again for the info

[Noose]

Actually that body may give the appearance of it but is far from being extremely raked. Tony P could show you.

[DirtyHairy]

Works for me... Hope you can get Tony to post some pics to show "what not to do".

[Mopar Rob]

Is this chassis legal for JK spec?

Could I have also just used the Backagra piece with out cutting off the wings? I could have built a longer wheelbase car since I don't see anything about maximum wheelbase? Careful reading of the rules say one can remove 1/4" off the back of the pan as long as it is square? It also says I can cut the rails to adjust the wheelbase?

I received a couple of PMs about it and just want to clarify, not stir the pot.

[tonyp]

I think the top is legal. I asked if I could cut the pans and add them back to the motor box and was told no, so I don't think the bottom is legal. Mr. Noose will have to make a ruling.

[Josh Crutchfield]

Could the IRRA please explain the difference between a guide tongue and a nose piece?
What makes a nose piece a nose piece?
What makes a guide tongue a guide tongue?

Thanks Josh

[IRRA Retro Racing]

A guide tongue is the piece the guide shoe rotates in.

In the IRRA™ Can-Am, GT coupe, F1, and Stock Car rules, the term, nose piece, is not mentioned nor the requirement of one.

All that is required is that rails connect the rear of the chassis to the front, i.e. the rails may connect directly to the guide tongue.

The text below is from the IRRA™ Can-Am rules:

1.Chassis Type: Any personally-built or commercially-available scratchbuilt chassis in kit form or built conforming to these specifications is allowed.

2.Chassis Materials: Brass: sheet, rod, and tube; steel: wire, pin tubing, and commercial guide tongues are allowed. No other materials are allowed. Chassis parts, such as pans, brackets, guide tongues, etc., that are made using EDM, laser, or water-cutting techniques are allowed only if they are individual commercially-available components or components of chassis kits (i.e. these techniques may not be used in the private manufacture of one-off components). Materials such as printed circuit boards are not legal.

3.Chassis Construction:
3a. Each car must have a one-piece 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".
3b. The motor bracket must support the motor and extend to touch the rear axle tube.
3c. The axle tube does not need to travel through the motor bracket.
3d. The motor can be screwed to the motor bracket and/or can also be soldered in place.
3e. Floating pin tubes inside another tube are allowed.
3f. Pieces of steel used for guide tongues are limited to a maximum 1” (25.4mm) total width and 1.50” (38.1mm) total length.
3g. The joining of brass sheet, plate, or strip parts via tab and slot or "keyed" construction is not permitted.
3h. Main chassis rails constructed of round steel or brass wire maybe ground or sanded flat on the bottom, but no more than 20% of the rail diameter may be removed.
3i. Wire or tubing rails must connect the front and rear sections of the chassis. Using metal strip for this purpose is not permitted. A rail is defined as that which connects the motor bracket to the front of the chassis.
3j. 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.

[Josh Crutchfield]

Cool, so I can use a piece of steel with a guide tongue soldered to it between the mainrails in the front as long as it fits the specs.

Josh

[Marty Stanley]

I have a question for the BoD - Do you think we might make bearings an option on Flexi-GT? Aside from JK Spec, you have the option on every other class of IRRA cars. I'm just requesting that we allow ball bearings to be used on Flexi-GT. To me it's a maintenance issue. While ball bearings COULD be more expensive initially, in the long run, they are actually cheaper.

[John Miller]

Cool,
So I can use a piece of steel with a guide tongue soldered to it between the mainrails in the front as long as it fits the specs.

Josh

But wouldn't one of pieces be a sheet of steel? I don't believe that that is allowed. Hmmm...

[Mopar Rob]

A guide tongue is the piece the guide shoe rotates in.

2.Chassis Materials:
Brass: sheet, rod, and tube; steel: wire, pin tubing, and commercial guide tongues are allowed. No other materials are allowed. Chassis parts, such as pans, brackets, guide tongues, etc., that are made using EDM, laser, or water-cutting techniques are allowed only if they are individual commercially-available components or components of chassis kits (i.e. these techniques may not be used in the private manufacture of one-off components). Materials such as printed circuit boards are not legal.

Cool,
So I can use a piece of steel with a guide tongue soldered to it between the mainrails in the front as long as it fits the specs.

Chassis Materials:
Brass: sheet, rod, and tube; steel: wire, pin tubing, and commercial guide tongues are allowed. No other materials are allowed.

Josh:

The way the rules are written the only pieces that can be steel are wire, pin tubes, and guide tongues. The tongue (from later in the rules) can only be 1" wide and 1-1/2" long

3f. Pieces of steel used for guide tongues are limited to a maximum 1" (25.4mm) total width and 1.50” (38.1mm) total length.

I'm sure the BoD will give you an official answer.

[IRRA Retro Racing]

Josh,

No, you can't use two pieces of steel.

The guidelines have already been published here and on the IRRA™ website.

Effective 1/11/10 the IRRA™ BoD will no longer provide assessment of components or commercially made frames / chassis. Those selling these items assume the responsibility to ensure that the items offered for sale will be capable of meeting the specifications as written.

And this...

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."

Mike's piece does not have to be approved. It meets specs as the rules are written.

Furthermore... Flexi nosepieces specifically aren't allowed.

Mike's piece is NOT cut from a Flexi chassis.

Mike's piece meets the current specs.

(posted for the IRRA™ Board by Joe Neumeister)

[Larry Mattingly]

Final answer?

LM

[Noose]

Yes, Larry, final answer.

[Ron Hershman]

Who collects the 10 grand???

[Jacob Shiplet]

So it being coined makes it legal, is that what I get from this?

[Noose]

Yes, the coined steel tongue is legal.

[Rick]

Can it be used as a standalone guide tongue on a retro chassis build? As advertised?

I didn't see this addressed by quoting the rulebook...

[Noose]

Yes, it can be.

[Rick]

Okay, I want this crystal clear for me. I cannot use a stamped steel chassis part. Can I use a guide plate cut from a Slick 7, Koford, RPM, etc., if it meets the measurements? I do have some of those that are no longer legal because of edition date, and/or crashed out and no longer good for Gp12 racing? TIA...

[Noose]

No, per the rule that has already been posted.

2.Chassis Materials: Brass: sheet, rod, and tube; steel: wire, pin tubing, and commercial guide tongues are allowed. No other materials are allowed. Chassis parts, such as pans, brackets, guide tongues, etc., that are made using EDM, laser, or water-cutting techniques are allowed only if they are individual commercially-available components or components of chassis kits (i.e. these techniques may not be used in the private manufacture of one-off components).

The IRRA™ does not consider portions cut from the center sections of Flexi cars or steel wing car chassis to be commercial guide tongues.