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Maserati 450S Driftin' Fifties proxy car


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#1 Pablo

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Posted 29 June 2017 - 07:28 PM

Spec motor and gearing is a JK Hawk 25 at 8/28 with 1" OD minimum wheels.

I have zero experience with these motors so I'd like to just see what they feel like.

 

A testing opportunity is coming up for me in two days so I found a quick and dirty way to accomplish that:

My Can Am IRRA® car. A simple motor and gearing change will do the trick.

Never been so happy to see quick disconnect wire clips.  :)

 

IMG_6389.JPG

 

In goes the H25. But 1" wheels won't fit, so I looked at the numbers and found 9/26 with .818" wheels mimics a 8/28 with 1".

If nothing else, it should give me a fairly good idea of how the motor acts

 

IMG_6391.JPG

 

IMG_6394.JPG


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Paul Wolcott




#2 Martin

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Posted 30 June 2017 - 01:54 PM

Hey, Paul,

 

Why the angled pinion? Just thinking it may damage your crown. OK, for a quick test I reckon. Test on. :)


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#3 MSwiss

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Posted 30 June 2017 - 02:04 PM

Just the opposite, ARP angled pinions work superior with 48p inline crowns, especially when the arm and axle shafts are offset.


Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
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Make checks out to Chicagoland Woodworking, Inc.


#4 Pablo

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Posted 30 June 2017 - 02:10 PM

To add to what Mike said, in the beginnings of Retro, it was discovered angled pinions with pink Parma crowns tolerate an offset "hypoid" bracket very well.

 

99% of all Retro cars use this type set-up today.

 

The bracket on this particular car is a Chicagoland adjustable bracket and the motor can be moved up and down for the desired amount of offset.


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#5 Jairus

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Posted 30 June 2017 - 02:33 PM

:victory: ARP is what I am using!  

I think Paul knows what he is doing.
 


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#6 Bill from NH

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Posted 30 June 2017 - 07:31 PM

The Red Fox F1 race cars with Deathstar motors were using angled pinions before Retro was ever created. :laugh2:


Bill Fernald
 

How old should a highway be before you tell it, that it has been adopted?


#7 MSwiss

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Posted 30 June 2017 - 08:11 PM

Correct.

Early in the Retro game, I sent Mike Steube a few to try out, because BP wasn't stocking them yet.

We were inspired by concours ace, Jack Beers, using them on his FCRs previously.


Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#8 Pablo

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Posted 02 July 2017 - 11:01 AM

Motor test results: at 12.5v my IRRA® Can Am car was full punch on the entire track.

 

By far the lowest power of any FK motor I've tested - about twice as slow as a Mini Brute.  :o


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#9 Martin

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Posted 08 July 2017 - 12:27 PM

I learn something every day. Thanks guys.


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#10 Pablo

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Posted 13 July 2017 - 05:02 PM

My Dilworth Maserati 450S body has arrived from Middlesex.

What other proxy sends you a free body of your choice? :dance3: :sun_bespectacled:

 

WB is 4" and wheel widths about 2 3/4"

 

IMG_6542.JPG


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#11 Pablo

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Posted 18 July 2017 - 03:59 PM

My wheels: custom trimmed JK, 250" width fronts and .375" width rears

 

IMG_6588.JPG


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#12 Pablo

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Posted 18 July 2017 - 10:51 PM

JK hypoid bracket - after some work, it's fairly true.

Chicagoland brace and Pablo moniker are simply mocked up for now

 

IMG_6598.JPG

 

Steve's "Driftin' 50's" proxy is truly "international".

Italian Maserati body was created by John Dilworth in England.

The #3 decals are a German font created by Patto's in Australia.

Wheels, motor, rubber, and bracket are Czechoslovak inspired.

I could go on. One World :)

 

The body is going to be pretty simple - three meatball numbers and a pair of Italian flags.

Paint will be a light black fog and red. All decals are inside, of course :)

 

IMG_6605.JPG


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#13 Jairus

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Posted 19 July 2017 - 11:24 AM

Looks great Paul! 


Jairus H Watson - Artist
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#14 Bill from NH

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Posted 19 July 2017 - 08:59 PM

1 mm = ,03937008 inches


Bill Fernald
 

How old should a highway be before you tell it, that it has been adopted?


#15 Pablo

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Posted 20 July 2017 - 06:43 PM

It's been brought to my attention the use of wire bracing and the brass plate brace on the motor bracket may not be legal.

Here is the rule: "Inline chassis made exclusively from brass rod and tube with a limit of two rods soldered together for their full length - exceptions: motor brackets...."

If it's not legal, I'll change it to brass rod "no problemo" :give_rose:

 

My Maserati paint job is done

 

IMG_6618.JPG


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#16 Jairus

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Posted 21 July 2017 - 02:32 PM

I like it!  Great way to separate your red car from the field of other red cars. :victory:


Jairus H Watson - Artist
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#17 Pablo

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Posted 21 July 2017 - 03:29 PM

Thanks Jairus :D

 

The brass brace insert had to go. Chassis errors are easy to fix. I'll simply set this bracket aside and use it on down the road.

Grab another fresh bracket and I'll be back in the game :dance3:


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#18 Pablo

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Posted 21 July 2017 - 07:15 PM

"Motor bracket", take #2:

 

IMG_6626.JPG

 

K & S makes 3/64" OD solid brass rod, so I ordered some for new bracing :spiteful:

 


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#19 Jairus

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Posted 21 July 2017 - 07:30 PM

Oh... I LIKE it!  :diablo:


Jairus H Watson - Artist
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#20 Pablo

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Posted 25 July 2017 - 04:03 PM

Hope you like this, too :) :

 

Made my own 10 thou Lexan interior deck and styrene roll bar to fit driver and body

 

IMG_6645.JPG

 

I don't have big enough jig wheels for this car, so I made my own by trimming old gears to .898" OD

 

IMG_6637.JPG

 

 

 

 


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#21 Pablo

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Posted 25 July 2017 - 06:21 PM

Once the build is done, I hope to sell the jig wheels to a Tram operation for big bucks :laugh2:

 

IMG_6649.JPG


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#22 Bill from NH

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Posted 25 July 2017 - 07:01 PM

A clockmaker might need those gears too. :)


Bill Fernald
 

How old should a highway be before you tell it, that it has been adopted?


#23 Pablo

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Posted 26 July 2017 - 04:57 PM

My Duffy (RIP) 2 degree tongue atop a piece of .063 brass sheet.

Steve-a-Roonie deemed it legal, as long as the brass wasn't wider or longer than the tongue

 

IMG_6667.JPG


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#24 Pablo

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Posted 27 July 2017 - 07:17 PM

Driver is ready for battle. I need to brush some black paint on that filament tape :)

The interior/driver/roll bar assembly is designed to survive a complete proxy series.

It's lightweight and designed to bend, not break.

Head is attached underneath the Lexan interior via .032 brass rod secured in driver's neck and an earring keeper

 

IMG_6672.JPG


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#25 Pablo

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Posted 27 July 2017 - 10:04 PM

So far so good......

 

IMG_6690.JPG


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