As I recall, in the beginning, there were three levels of preparation:
Stock, Prepared, and Modified. Somewhere in the 80s, Street Prepared was
introduced...and didn't relate to Prepared at all. That, I believe was
an error. The rule makers could have linked SP with P if they wanted to
(as in wheel sizes, carburetion, etc.); they didn't. And we've been
stuck with it ever since.
--Pat Kelly
Mark Sirota wrote:
>
> msmith2 wrote:
> > So, why is it that a $5000 FI system is ok in SP, but you have to have
> > the stock cam, while in Prepared, you can have any cam/heads you want,
> > but there's a penalty for any alternate induction other than what's
> > listed in the book?
>
> Because nobody ever promised that Prepared is "more" than SP?
>
> I wish I could understand why this one comes up over and over and over
> and over again... There is not a smooth progression through the
> categories from S -> SP -> P -> M. And that's perfectly okay. There
> are two; S -> SP -> M or S -> P -> M. Choice is good, right?
>
> For engine rules specifically, think of it this way -- both SP and P
> have methods of restricting motors so that we don't get too much power,
> nor do we get short-lived grenade motors. In SP, you can change
> intake and exhaust but you can't change how much air moves through the
> engine itself. In Prepared, you can change how much air moves through
> the engine, but you're still limited by the intake. Two methods of
> achieving the same result. Choice is good, right?
>
> Mark
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