[Parenn911]

Originally Posted by }{arlequin

(i think you should put me in as your "chief" mechanic )

not if you ever want to see your engine back together in this life time .......just don't ask him to change out your MC.

But we shouldn't make fun of Dave just because he likes to ride the short yellow school bus, I mean it's not our fault he comes from the school of "slower is better".

[wludavid]

Originally Posted by TD in DC

hmmmm Kevin, your comment raises a great point. Several people have mentioned blueprinting and porting heads as ways to improve the performance of the 944s. What is permissible in 944 Cup/PCA Stock clases/SCCA ITS without bumping you up into a higher class? I realize all of the rules are different, but they don't specifically address my questions. For example, in Stock PCA classes, the rules say that that the engine cannot be modded from the intake to the exhaust. What counts as a mod? Does blueprinting count as a mod? Does porting the heads count as a mod? Does cross/perpendicular drilling the crankshaft count as a mod even though it does not increase HP?

Wow, those PCA stock class rules are written poorly. And the SCCA rules encompass so much it's hard to get clear answers. If you go on the safe side, I'd use the SCCA rules though, since they are much more descriptive, if not less confusing. But you're trained in legalese right? Rulebooks are usually written with the stipulation, "if it doesn't say you can do it, you can't do it." So a 'mod' to a stock motor would be loosely defined as anything not described in the factory engine rebuild specs. Of course, if you really go all out, there's still a lot that can be done within spec. The bhp number given to the engine is just an average, with the actual range maybe 6% higher and lower. Hand building an engine right in the middle of the spec will give you pretty close to that rated number. Deviating from the spec will yield a higher or lower number. I don't know enough about about building engines to give more guidance than this. As of now, this is all from book-larnin'.

[}{arlequin]

hmm.... yellow and green make blue!!!

those buses are fun.... pack 'em full of sports gear in the back, coolers, helmets etc.... then all the other "passengers" and watch it pop a wheelie..... weeeee!!!!!

[}{arlequin]

Originally Posted by wludavid

Rulebooks are usually written with the stipulation, "if it doesn't say you can do it, you can't do it."

see.... i'm coming from exactly the opposite side..... if it doesn't say you CANNOT, then it must mean you CAN (until they tell you that you can't)

i never knew that rulebooks are written w/ that stipulation..... is there a rulebook for rulebooks that i haven't been aware of?

[wludavid]

From the PCA club racing rulebook:

Any Modification not specifically listed is not allowed. In other words, if the rules don't say you can do it - DON'T.

I'm sure the SCCA rules say something similar, but I couldn't find it.

[}{arlequin]

..... i hope this rule is just for the engines 'cause there may not be a rule about stacking spacers under seat mounts but if i were 5ft tall, would that mean that they would not allow me to see over the dashboard?

or alternatively, mount the seat (safely) but on the floor of the car? some would say i illegally dropped the center of gravity


hey this is just like work but more fun!

luckily, in these types of classes driver is about 75% of the speed, 20% is car prep, and the rest the "go fast" mods

[Vicegrip]

Yes with PCA you can blueprint the motor. You can remove metal from motor parts but for balancing and fitment reasons only. No porting or reducing rotating mass or cam regrinds and the like. You want to go krazy go GT and have at it!

You can make the car safe too. There is little stopping you from that in stock class or GT. BTW making the car safe does not mean adding 200HP and remaining in class.

The PCA Club Race rule book makes more sense in the whole than do some clippings taken out of context. I have found the PCA rules to be the easy ones of the bunch to understand overall.