Top speed run. Can this be right?

[smithbling]

Originally posted by 96GTfanatic:
did u remember to calculate wind resistance and resistance from your tires onto the road in the equation? that 175 mph is probobly the speed ur tires would spin at if u lifted the back end off the ground and reved to that rpm in that gear. how much hp do u have? it is possible but unlikely unless u have like 500+ hp

Weight has zero effect on top speed. This means that whether or not the rear tires were lifted from the ground is irrelevant. Based on his calculated top speed at 5400 RPM wind and aerodynamics too are irrelevant. In other words if 5400RPM in 5th=175MPH then when you achieve that you are doing that.

exgmguy

5400 RPM in is what you reached but your speedo only reads somewhere lower. Go out and do 1800RPM in 5th. Record the speed. Say 50MPH. You can simply triple the speed and RPM to get 5400RPM and 150MPH. This works only if you remain in the same gear and it also works because there is a linear relationship between speed and RPM in a given gear. This method is FAAAARRRRRRRR more accurate than the calculators.

For those of you who like calculators try this:

Achieved RPM*Tire/Rim height
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Rear gear ratio*Tranny ratio for gear*346

Take this number and decrease it by 7.4%. You will also be very close to your top speed but likely a little optimistic still.

Any questions class?

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88 Notch

MAC Headers, MAC H-pipe, MAC Pullies, KN, and BM Shifter

Best ET: 14.689
Best MPH: 98.54
Best 60': 2.333