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FB autoX classing help

Old 09-23-12, 12:59 AM
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FB autoX classing help

Ok, so Im going to be doing my first official autox event next weekend, and would like to make sure I have classed my vehicle correctly to minimize any complaints or people crying "foul". So far, Im 95% sure I should be in SSM, but 5% of me says maybe CSP ? My copy of the SCCA rule book has some strangely worded "gray areas" and makes little to no mention of rotary engine and/or coinciding swaps/modifications.

mod list:

1982 Mazda Rx-7 GS
LSD rear end swap
Light steel flywheel
Series 4 NA 13b motor swap - turbo housings & street ported
Ported manifolds & T.B.
3 row aluminum radiator (mounted similar to an FC)
RB header, dual 2"pipes to RB muffler (no cats)
Custom built front coilovers (FB spindle, bored 2" to accept 240/280Z strut tube) w/ Koni 8610 single adjustable insert (No roll center adjuster)
GC camber kit w/ custom built plates/mounts
RB rear springs w/ Koni 1026 double adjustable shocks
15x8 wheel w/ Bridgestone RE-01R 195/50 (180 treadwear)
Modified stock fuel tank w/ sump cup installed

what class do I legally belong in?
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Old 09-23-12, 11:15 AM
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Originally Posted by Sgt.Stinkfist View Post
3 row aluminum radiator (mounted similar to an FC)
Download the regs from The Sports Car Club of America - Home and check them out for each mod.

The radiator will put your car in SSM if the mount locations are not stock.

L. Engine cooling radiators may be replaced with alternate parts subject
to the following restrictions:
1. Radiator core dimensions (width, height, thickness) must be no
smaller than the standard part.
2. Radiator must mount to OE radiator mounts.
3. Fluid capacity and dry weight of the radiator must be no less than
that of the standard part. Installation of an alternate radiator may
serve no other purpose (e.g. to allow a cold air intake passage).
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Old 09-23-12, 05:48 PM
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I have that same rule book and when it comes to #2 "Radiator must mount to OE radiator mounts" even tho im angled like a FC, I still am utilizing the stock mounts technically.

example 1. unmolested stock FB air box/radiator mount side pieces
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Size:  111.6 KB

example 2. molested stock airbox/radiator side mounts. pretty much took a triangle section from between stock chassis mount and stock radiator mount, and tipped it forward. BUT, I am still using the OE radiator mount
Name:  moddedradiatormount_zpsb91f0bdd.jpg
Views: 8
Size:  83.3 KB


would this technically fly in CSP? I know its pushing the envelope for "creative interpretation", but word for word it is legal

The only other area that I am iffy about is my engine, as rotary engines are rarely mentioned in the rule book. In the eyes of SCCA is any non turbo/non RENESIS 13B keg interchangeable for "engine/model conversion within chassis/generation" i.e a GSL-SE converted powerplant? especially considering the modular/frankensteinability of rotaries. and lastly, I dont see any mention of rotary engine porting allowances. They talk about power adders like forced induction, or cylider heads/engine blocks, but no street/bridge/peripheral porting
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Old 09-23-12, 09:28 PM
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It doesn't matter. The engine already puts you into SSM.

Welcome to the club

the compression is different and so is the displacement for the year. In street prepared classes you can't touch the internals at all.
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Old 09-23-12, 10:05 PM
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cool beans, then I will keep myself registered as SSM. looks like I get to play with the big boys... all sorts of EVO's and Subies and a few others
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Old 09-24-12, 10:18 AM
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Yep, you ported the motor so now you play with the big boys.

Sounds like a fun car, I think you'll do fine. Just remember to drive really fast!



.
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Old 09-24-12, 02:23 PM
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Originally Posted by eage8 View Post
It doesn't matter. The engine already puts you into SSM.
D'oh!

How did I miss that?
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Old 09-24-12, 09:45 PM
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Thanks all. I will do my best for the rotary community this weekend, and hopefully dont end up on the *** end of an *** whooping... lolz. It should be a fun event. Trophies, prize money, door prizes, 60ft competition and rolling burn out competition (im gonna bring up some of my stocky 13's and destroy them ) ...wish me luck
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