Originally Posted by GT3DE

Ok, here it is.
911CUP - 911 cars from stock- D, E, F & G
1) no changes from any existing stock letter class rules except weight.
2) Hoosier tire contingency awards for those running R7.

weight changes from existing rules:
D - minus 200
E - minus 100
F - minus 50
G - no change

We have polled numerous people and found that for E taking out 100 is easy. But for D taking 200 may be difficult but certainly possible. If the D cars are having trouble we may loosen the rules on ways to get rid of weight cheaply/easily.
Also, 200 may not be enough for D and if we find that it needs to be more than 200 then we look to the D guys and gals to help find the right number as well as suggest cheap/easy ways to reduce weight (fiberglass hoods, fenders, etc.??? I'm not the expert here). The biggest delta in times seems to be the D to E lap times so rules may have to change for D to get lighter. Alternatively, for about $10k a D can become an E by changing pistons and the fuel distributor thingy, thus becoming a Euro SC instead of American SC. But we are trying to include D cheaply and it's the hardest of the bunch. It's either that or drop D altogether. Would rather include it than drop D.

FWIW, dropping weight has little to no effect on the car setup. I know because we setup my car without me in it (almost 200 pounds) and then checked it with me in it and nothing changed on the laser dyno.

Trying to get this new class up and done before season starts at Sebring...

Originally Posted by GT3DE

Here's an idea, 911 only, to get big group of 911 together, aka 911CUP:
D modifies engine to become E.
E gets minus 200#.
964 F drops 270# to become 964 G.
G stays same.
Simple, easy.
This is hardest on D but D is almost gone anyway. And lots of E's used to be D's already.
D to E engine modification is pistons and fuel thingy, about $10k to $11k.

Originally Posted by M_Weining

Originally Posted by GT3DE

Would the few remaining D 911SC cars be willing to spend $11k to modify engine to Euro spec to become E?

Originally Posted by Gary R.

If I remember correctly, it's more than just new Pistons and a "fuel thingy". Have to run it by Walt (or someone else in the know) but to be legal you need euro pistons, a Euro fuel distributor, euro fuel lines, euro injectors, a euro distributor, etc. Less involved than creating a 3.2 Carrera out of an SC (which Sean and I did) but still pretty involved. Maybe open the window to modified cams, timing, and injectors and a 3.0 can get up to 200-210 WHP and at a lower weight it may just work..

Originally Posted by Weston Dillard

At the risk of reopening the E vs 911 Cup war, this makes sense for an E car because it has to be made to a Euro Spec. But it the point were to just get another 25 HP out of D cars, even if that meant they aren't now a clone of a factory car, is there a cheaper way to do it? Actually this brings up another question - 25 HP is the factory difference. Is the real world difference really about 25?

West

Originally Posted by Gary R.

My brand new 3.2 synod at Behe with 226 WHP and he told me it was about 10 HP below the top cars he did. My D car with new engine put out 190 WHP on the dyno and it was a top car. 36 HP is a lot...

Originally Posted by dgmark

Remember this would be a new class so modifications do not necessarily need to follow PCA stock class rules. You cold be creative with D cars to make them competitive. That is until the D car is the car to beat then everyone will be crying.

Originally Posted by Gary R.

Lol.. there was a time when some D cars beat 95% of all E cars, but then the E owners creativity rose to the occasion..