At 10:30 PM 5/12/99 -0500, Brian M Kennedy wrote:
>At 09:48 PM 5/12/99 , Jamie Sculerati wrote:
> >
> >----- Original Message -----
> >From: Lance Schueneman <lances@wt.net>
> >
> >> Can anyone help me out here? I am currently running ST and building my car
> >up
> >> for it. I read the rule book about Underdrive Pulleys and talked to a CSP
> >competitor
> >> because ST uses the CSP rule in that case, and they are illegal. Now,
> >after
> >> some discussion on a message board, someone else states that there's been
> >a
> >> rule update in SportsCar that says that they are legal. Can someone shed
> >some
> >> light on this?
> >
> >The earlier question refered to accessory pulleys only. From the SIIR:
> >
> >14.10 Engine and Drive Train
> >U. Any accessory pulleys and belts of the same type (e.g., V-belt,
> >serpentine) as standard may be used. This allowance applies to accessory
> >pulleys only (e.g., alternator, water pump, power steering pump, and
> >crankshaft drive pulleys). It does not allow replacement, modification, or
> >substitution of pulleys, cogs, gears, or belts which are part of cam,
> >layshaft, or ignition drive or timing systems, etc. Supercharged cars are
> >excluded from this allowance. This does not permit replacement of integral
> >pulley-dampener/balancer assemblies.
> >
> >An underdrive pulley on the crankshaft is an illegal modification.
>
>Hmmm. Any pulleys that drive _accessories_ can be changed out.
>I have written a letter and received a response that confirmed that
>such rule allows you to put different size accessory pulleys such
>that they underdrive the accessories. That is okay -- but the accessories
>must be driven. Thus, the often marketed "underdrive pulleys" are legal.
For those of you unknown to the neon underdrive pulley by unorthodox, it is
located on the crankshaft. I havent heard the final word on high about tis
as of yet and havent messed with mine other than update/backdate. Other
underdrive pulleys are on the accesories themselves as mopar is coming out
with one for the altenator.
>You cannot change pulleys that drive the camshaft, timing, or any part of
>the engine. And if your car has a supercharger, no pulleys can be changed.
>
>
> >
> >>I think that they should be legal, because it's a fairly easy
> >> modification that most of the sport compact market has and many people
> >already
> >> do have on their car.
> >
> >Quite true. The STU rules seem to allow this:
> >
> >VII. ALLOWED MODIFICATIONS (STU)
> >
> >1. The following additional Street Prepared rules are allowed: 14.1.C&E;
> >14.2.A&B; 14.4, 14.6, 14.9.
> >
> >2. Drivetrain and related components (induction, ignition, fuel systems,
> >etc.) are unrestricted except for the following limitations:
> >A. All components must be emissions legal (California Air Resources Board
> >Certified, etc.), or vehicle must have a valid state emissions
> >sticker.
> >B. Vehicle must be legally registered for the street.
> >C. Must comply with section 3.6.B regarding fuel
>
>Hmmm. ST allows 14.10.V explicitly. 14.10.V?? I assume that is a typo and
>they meant to allow 14.10.U explicitly. That should be confirmed with a
>letter, if the typo correction hasn't already appeared in FasTrack.
>
>Brian
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