Quote:
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Originally Posted by FunkyStickman
Which SCCA rules are you getting these out of? I'm looking at a 2008 copy, and here's what it says under Street Prepared: (parts pertaining to Red Lines are highlighted) And it also says that our cars fall into their SP category relative to the stock class they run in. So if we're in DS, then we'd fall into DSP as long as we don't break the rules.
C. Induction allowances are as follows:
1. Carburetors, fuel injection, and intake manifolds are unre-
stricted, subject to 15.10.D. Alternate throttle linkage and
connections to facilitate installation of allowed induction
systems are permitted, but may serve no other purpose. If an
induction system item is allowed to be removed and its origi-
nal mounting bracket can be removed by simply unbolting it,
the bracket may be re-moved as well.
2. Except for standard parts as defined in these rules, the exter-
nal use while on course of liquids, ice, dry ice, refrigeration
systems, vaporized compressed gases, etc. to reduce the
temperature of the intake air charge is prohibited. Wrapping
of intakes with liquid-soaked fabric is not permitted.
3. As utilized only on engines originally equipped with forced
induction, induction charge heat exchangers (known as “in-
tercoolers” or “charge air coolers (CACs)”) are unrestricted in
size and configuration. Air-to-air CACs and radiators for air-
to-liquid CACs must be cooled only by the atmosphere, except
for standard parts. Body panels, fascias, or structural mem-
bers may not be cut or altered to facilitate CAC installation.
4. Turbochargers and/or superchargers (“forced induction”)
may not be added, changed, or modified (this does not allow
ceramic coating of turbochargers). On vehicles originally
equipped with forced induction:
a) No hardware changes or alterations to turbocharger(s) or
supercharger(s), in size or number, are permitted. Turbo-
chargers or superchargers may be updated/backdated
only in conjunction with the accompanying complete
engine unit.
b) No changes are allowed to waste gate(s) size, number, or
location. No changes are allowed to variable-geometry-
turbine (VGT) hardware.
c) No changes are allowed to supercharger drive system
pulleys. Belt tensioners may be added/changed to reduce
belt slip.
d) No changes are permitted to blow-off/pop-off valves.
e) Compressor bypass valves (CBVs) are considered part of
the air intake system, and may be replaced or updated/
backdated independently of the other components of a
forced induction system.
f) Boost regulation systems, either electronic or mechanical,
and electronic fuel cuts referencing boost pressure may be
altered or modified except as prohibited herein. Boost
pressure changes resulting from authorized changes are
permitted.
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My take exactly!
Which means you can use sub-frame connectors (I have them), add an additional rear swaybar (I have one), add a stage 1 kit (it's ordered), add a cold air (don't need it), use any disk brakes (I already use Brembo & Hawk), use any springs (including lowering springs -- which I'm not a fan of for autocross), use any shocks (I have Konis), you can have the rear wheels 'shimmed' out to as much as 1.5 degrees of negative camber and you can take the front out to as negative as you want (I like 2.0 degrees of negative) and you can even add tow-out to the rear wheels if you're really fast (both ends negative next week), you can change to eurathane mounts (maybe), you can add a torque limiter (a 'Stiffy' -- maybe) and you can run any wheels and tires (so I'm going to have custom wheels made -- 17" X 10" wide, with about 15mm of positive offset -- to use 295/35 x 17 Hoosier A6s or 315/35 x 17 Kumho V710s), another reason to not like lowering springs since these wheels/tires will likely stick-out past the body edge.
I think the above is enough.
Scott