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      12-11-2010, 05:13 PM   #58
grant
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Drives: 1973 Porsche 911
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Quote:
Originally Posted by 330CIZHP View Post
Biggest factor that people who worship numbers on the paper ignore are "torque multiplication from gearing and axle ratio" and "low mass inertia" as well as "horsepower and torque cross over point at 5252 rpm".

I am sick of ignorant people parading torque numbers on paper "oh the paper says 370 ft-lbs of torque". Get this in your head. All on their own, they don't mean squat since wheel torque is far more dependent on torque multiplication through gears than it is on crank torque figures.

Both torque multiplication and low mass inertia are factors associated with high-revving engines and telepathic throttle response and eager, hyper-alert senses from the car.

Due to low-revving turbo engines having only 7000 rpm redlines, short final drive and short gears are impossible since their acceleration and top speed suffers so they MUST get tall gearing making the car have a "lazy" character.

Due to the high low end torque numbers, the car's internal inertia including flywheel must be made heavy and willing to withstand the thick midrange crank torque making the car slow revving to redline while high revving cars are essentially the opposite where they must have low mass inertia to rev quickly to redline.
Well said.
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