924Board.org

Cbass · Guest

Well, the reason they started calling it Formula 1, is that they all follow a "formula". This formula states how much displacement, how many cylinders, what sort of drivetrain, maximum wing area, and what sort of tire they can run. That sort of thing.

I agree with you about the practicality of turbo street cars. With an older motor, running lots of boost with a mechanical wastegate, the power is really on/off.

However, on many modern engines, it just starts to blend in, from very low rpms. Modern engine computers have really made turbos practical for street performance applications...

That Audi motor I was quoting figures for has it's boost kick in really low, but off throttle, it's still a 2.2 liter motor. Great fuel economy, but power comparable to a 5.0 Ford, with a broader powerband.

The trick to streetable setups is high compression, with knock sensors. You put as much boost as you can into a motor, before reliability is comprimised. The 20VT runs 15 lbs of boost on 9.3:1...

Honda Killer · Guest

I dont mind the changing motors idea but why use chevy? why not a 2JZ supra or a 300ZX motor just seems more fiting to the car. but to each his own.

Cbass · Guest

V8s are cheap and available. High end Japanese motors are expensive and rarer, and they get snatched up by import guys.

I'm a proponent of German swaps, but nobody on this continent seems to agree...

abduln · Guest

larso:

I think you are attributing characteristics to turbochargers that should actually be attributed to a specific car.

930's don't spin because of the turbocharger and power, it's because 60% of the weight is in the back of the car, 911's spin too. A 993 twin turbo, which has far more power than the 930, has a rengineered chassis and is far less susceptable to spinning despite having gobs of power.

As for pulling turbos from F1, it probably has to do with cost containment. F1 was getting so expensive that only the big manufacturers could field competative cars.. that is what put the IMSA GTP series in the grave, cost too much. FIA isn't worried about speed as a safety factor, all they have to do make groud effects rules which slows the car down.

Abdul

[ This Message was edited by: abduln on 2002-08-05 19:55 ]

larso · Guest

Old technology (930s) have rapid boost which makes the car spin. New 993s are not comparable to930s, they've got technology, and their boost probably comes on evenly, not joltingly. If you are trying to say that a 911 and a 930, with similar tires, and chassis, are the same when it comes to spinning, you should drive them. A car's spinability is a lot more prone, when you've got melted rubber. Melted rubber comes easy with lots of power, uneven power especially.

As for FIA not worried about speed, why did they put grooves in the tires.