4.10 gears...not what I expected. - ZR-1 Net Registry Forums

Hog · 05-20-2014

Stock gearing 3.45

385 lb/ft engine torque/2.66:1 1st gear ratio/3.45:1 rear gear'

385x 2.66x3.45=3533 lb/ft torque at the rear at the halfshafts

4.10 gearing
385 lb/ft torque/2.66:1 1st gear/4.10 ratio

385x2.66x4.10=4198 lb/ft @ the rear halfshafts.

4198/lb/ft3533lb/ft=18.84% increase in torque

We are measuring the actual torque or twist that is seen at the rear wheels, not calculating the torque of the engine.

There would be a measureable difference if before and after 1/4 mile runs were done.

I went from a 3.08 gear to a 4.10 gear and was unimpressed in gains in acceleration during WOT SOTP testing.

05-20-2014	#11
Hog Join Date: Jul 2010 Location: Woodstock, Ontario, Canada Posts: 1,271	Re: 4.10 gears...not what I expected. Stock gearing 3.45 385 lb/ft engine torque/2.66:1 1st gear ratio/3.45:1 rear gear' 385x 2.66x3.45=3533 lb/ft torque at the rear at the halfshafts 4.10 gearing 385 lb/ft torque/2.66:1 1st gear/4.10 ratio 385x2.66x4.10=4198 lb/ft @ the rear halfshafts. 4198/lb/ft3533lb/ft=18.84% increase in torque We are measuring the actual torque or twist that is seen at the rear wheels, not calculating the torque of the engine. There would be a measureable difference if before and after 1/4 mile runs were done. I went from a 3.08 gear to a 4.10 gear and was unimpressed in gains in acceleration during WOT SOTP testing.