Modifications allowed by Class - Page 3 - MR2 Owners Club Message Board
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post #41 of 57 (permalink) Old March 11th, 2008, 22:42
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Quote:
Originally Posted by SBrian2
Yep, I had cone trouble on day 1, but was faster that Robert on day 2 in Dixie. I'll trade a Tour loss for a Nationals win any day though. Robert probably won't have to deal with me too much longer anyways, I'm thinking of going to CSP.

Brian Johns
Wow...I might actually be able to win some contingency this year then!!!

Sorry to hear you leaving the class Brian. If you and Tara ever need a ride, talk to me.

-MGD
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post #42 of 57 (permalink) Old March 10th, 2009, 18:31
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I have a sc swap in my na... I had heard that SCCA changed their ruling to allow these swaps, but looking at appendix A, CSP it doesn't look like that's the case. I'm planning on going in about 2 weeks, so I should figure out what class I'm in. Everything other than the engine is pretty tame- I've redone the suspension, but as far as I recall, it's stuff that's allowed as far down as ST.

Can anyone tell me what class this bumps me to?
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post #43 of 57 (permalink) Old April 22nd, 2009, 21:25
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hey i read a bit about someones twincharged mr2 in this post. anybody know what my car would be in, it's a twincharged gze ae86, stripped interior, racing seats and slicks, nothing in the car is stock but glass and shell.

My main autox car is an n/a aw11, i'm getting slicks for it soon, what will that do to class. I'm also thinking about headers/exaust, and itb's. thanks!
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post #44 of 57 (permalink) Old April 23rd, 2009, 08:30
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Quote:
Originally Posted by sliverstorm
I have a sc swap in my na...
I had heard that SCCA changed their ruling to allow these swaps,
but looking at appendix A, CSP it doesn't look like that's the case.
You're OK in CSP I think.
Looks like it will be in a Fastrack once again.
https://www.mr2oc.com/showpost.php?p=...5&postcount=16
https://www.mr2oc.com/showpost.php?p=3621335&postcount=1
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post #45 of 57 (permalink) Old September 30th, 2013, 10:27
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91' turbo
LSD swap
Solid poly motor mounts
Poly control arm bushings/sway bar bushings
Ko racing down pipe
Muffler shop cat less exhaust w/cherry bomb glasspack
St springs


...if I'm reading that chart correctly...just the fact that I went to poly bushings, puts me in 'prepared'?
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post #46 of 57 (permalink) Old September 30th, 2013, 10:34
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A Street Prepared.

LSD, suspension bushings, motor mounts, exhaust, cat delete, springs. All legal in SP.
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post #47 of 57 (permalink) Old October 1st, 2013, 08:19
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What type rim/tire can I run? Am I restricted on width? Tried to look up what other asp mr2's are running..with little luck. What size rim/tire would you guys suggest on a 91 turbo?
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post #48 of 57 (permalink) Old October 1st, 2013, 09:39
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Quote:
Originally Posted by box&sox
What type rim/tire can I run? Am I restricted on width? Tried to look up what other asp mr2's are running..with little luck. What size rim/tire would you guys suggest on a 91 turbo?
All you can get.

Wheel size is unrestricted in SP. You are required to run on DOT certified tires (anything up to and including R-Comps, but no racing slicks).

Don't know what the other SP turbos are running so I will leave it to them to reply but tires are critical to competitiveness.
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post #49 of 57 (permalink) Old November 24th, 2013, 15:29
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Stock replacements/adds

Question regarding a couple of improvements...
I just ran my first Autocross last weekend with my 1993 N/A. I plan to run Novice next year then move to the E Stock (new Street) class.

1) I would like to replace all the worn rubber bushings on the suspension components, but SCCA rule 13.0 states "Alternate components which are normally expendable and considered replacement parts (e.g., engine and wheel bearings, seals, gaskets, filters, belts, bolts, bulbs, batteries, brake rotors, clutch discs, pressure plates, suspension bushings, drivetrain mounts, fenders, trim pieces, etc.) may be used provided they are essentially identical to the standard parts (e.g., have the same type, size, hardness, weight, material etc.), are used in the same location, and provide no performance benefit." And 13.8C states "Suspension bushings, including but not limited to those which carry the weight of the vehicle and determine ride height, may not be replaced with bushings of a different material or dimension."

So question #1, Can I use the new polyurethane bushing kits and stay in compliance with these rules? Or should I replace them with OEM rubber bushings?

2) I would like to add to the engine bay, the upper strut cross-bars (not from strut tower to strut tower, but the X-bracing to mount on the factory-fit mounting tabs to each strut tower.
So question #2, was this upper strut cross-bar a stock option with the original vehicle? And, would a homemade version be considered a non-stock modification and put me in another class?

Any response much appreciated...
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post #50 of 57 (permalink) Old November 24th, 2013, 21:29
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Question #1: No. Bushings must be OE or aftermarket reproductions that are of the same material. Poly is not. You must use the OE bushings.

Question #2: The engine bay cross brace must be the OE parts. Also, must be standard or optional on the car as fitted. Home made or aftermarket are not legal.
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post #51 of 57 (permalink) Old November 24th, 2013, 21:39
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Thanks for the help! Gives me a direction to begin the parts search and to get some winter work started.
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post #52 of 57 (permalink) Old November 25th, 2013, 08:41
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Quote:
Originally Posted by Schnitzengiggle
Thanks for the help! Gives me a direction to begin the parts search and to get some winter work started.
Glad to help. Good luck next season.
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post #53 of 57 (permalink) Old December 2nd, 2013, 07:34
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[/QUOTE]Question #2: The engine bay cross brace must be the OE parts. Also, must be standard or optional on the car as fitted. Home made or aftermarket are not legal.[/QUOTE]


Do you know if the OE strut bar was standard or optional on the 1993 NA MR2 - in US or Canada or other countries outside of the US? If so, and if I add the OE strut bar, I can make the argument that it will not bump me to a class outside of stock, right?
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post #54 of 57 (permalink) Old December 2nd, 2013, 13:48
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Question #2: The engine bay cross brace must be the OE parts. Also, must be standard or optional on the car as fitted. Home made or aftermarket are not legal.[/QUOTE]


Do you know if the OE strut bar was standard or optional on the 1993 NA MR2 - in US or Canada or other countries outside of the US? If so, and if I add the OE strut bar, I can make the argument that it will not bump me to a class outside of stock, right?[/QUOTE]

Don't know but the Factory Service Manual will show it if it was available.

Maybe somebody else here can answer.
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post #55 of 57 (permalink) Old December 2nd, 2013, 14:21
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Officially I don't know, but based on pictures I have seen I don't think the X-brace was very common on NA models. It may have only been OEM on the turbo model.


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post #56 of 57 (permalink) Old April 9th, 2017, 22:03
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Just a note to everyone that the link is dead and not coming back. The site infrastructure it was hosted on has shut down permanently.
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post #57 of 57 (permalink) Old April 10th, 2017, 10:00
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Here's a similar worksheet that may fill the void for a while:
http://www.scca-milwaukee.org/solo/C...sheet%20v4.pdf
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