John Veninger

There is a proposed rule change for 2008 in the GT class. This will allow a bunch more 928's to race in the GT classes and be competitive.

Proposal 1 will get a few into the GT3 class.
Proposal 2 does get the 4.5l and 4.7l guys into GT3.

Take a look and hopefully there will be a few more 928's racing in 2008!

http://www.pca.org/clubrace/docs/200...0Proposals.doc

cdbtx

That's great news - I've avoided the PCA like the plague since there was no way on earth I could be competitive..

John Veninger

Now you can!

SwayBar

Why do they list in GT3:

8-cylinder, 4-valve, water cooled, max displacement 4.9L

...when there are no 8-cylinder 4-valve engines smaller than 5.0L in stock form (..other than a Cayenne)? Why not allow a max displacement of 5.0L? Unless I'm missing something, that makes no sense at all. I seriously doubt someone will attemp to race a Cayenne.

Jean-Louis

They also need to add turbo/supercharged

ew928

Isn't the S4 lump technimacally 4.93 liters?
I love rounding down. Unless it's bank interest.

John Veninger

That is why Proposal 1 is much better. You can get a 5.0l into GT3.

They did in proposal 2. The small 4.5l supercharged can run GT2. The larger supercharged engine will run GT1 like before.
Proposal 1 address it by the performance factors. hp/l and weight.

This is not perfect, but a HUGE step for the 928 in PCA club racing.

mark kibort

sounds like i need to read up on it going in the right direction, but if you have raced with GT3 class, you know that it is almost as fast as the fastest GT2. 928s need to run in GT4
what are the provisions for Hp to weight? I havent looked yet. PLUS, absolute weight should be one of the MAJOR facotrs, and it is completely ignored, yet it accounts for 2/3s of any race cars base performance (ie braking and cornering)
do you guys know that in speed touring, honda civics, mazda 6s, bmw 325s can run 2:26 at road america with less than 300rwhp??? (on DOTs no less)
speed world challenge gets this formula. PCA needs to step up and revamp the classing system . simple is great, but they can do that as well and at least be in the ball park for some of the non 911 cars.

mk

John Veninger

Please read before you make assumptions.

mark kibort

i read the rules. good start. actually, keeping it simple and only having a few classes, it works well.
nice work.

Mk

atb

What specific changes would make these proposed rules better for the 928?
I'd be curious to know what would even (not tip) the playing field if the 928 is unfairly disadvantaged right now.

BC

Would a supercharged 4.5L 928 be competitive in GT2?

James-man

Depending on how crosseyed and drunk I look at this, the two proposals would slot a 32 valver in GT2, GT3, or GT4. That is quite a range.

Did they nail down the 4.9L for a reason? How certain are we that rounding down is the intent? Do they do this so that folks won't go to the effort of micro-stroking? They must not be aware of how difficult a 928 stroker project is.

Don't forget to sandbag your performance in 2008 so they won't immediately go to rethinking the classifications for 2009!

John Veninger

Don't know until someone builds a high hp one.

I think the biggest advantage is you can build some high HP 4.7l and 5.0l engines, get the weight down and be competitive in the GT3 field.

It may not be perfect, but the old way a 4.7l 928 was in GT2 along with the 6.4l stroker boys.
I remember RA in 2003, Anderson went by me as if I was driving a Accord! Was real motivation to build the stroker!

John Veninger

And GT1. All depends on the weight of your car and the size of the motor you build. That is what is nice about the first proposal.

Would be cool to see what can be done to the 928 engine in the smaller displacements. Maybe this rule change will help!