Wanna Know Your Final Gear Ratio ? ?

[0HP930]

Originally posted by "bitemark46"

No, it's off. It doesn't take into consideration of wind resistance or drag at high speeds. So it's off. I have a 26" tall ET drag w/ 4.56's gears. And my time slip doesn't lie. All of these calculators on the internet will be an estimate. Cause it can't account for real world variables. -Mark

Dude, unless your tires are spinning this calculator is 99.99% correct. This is a calculator, not an estimator.

While your tire radius may be effected slightly by tire pressure and loading, drag and speed have little to do with why you are probably off.

As has as already been mentioned here if you have an overdrive top gear this will also make your final drive ratio differ from your axle ratio.

If not that then it is your tire radius, tachometer or speedo that is off.

[Mr 2]

Originally posted by "Tom"

170mph at 7100rpm give me a 3.069 top gear ratio.

i got that same ratio...but i was 181mph at 8400

Yeah but mine will top out and yours won't

[MikeB]

2.577