RPM @ 80mph with 4.10 vs 3.45? - ZR-1 Net Registry Forums

VetteMed · 07-09-2009

Noticed that the rpm at 80mph is around 2500 rpm(as indicated on tach) in 6th gear, which seems high to me. Can anyone please verify, what rpm is expected with stock gearing vs 4.10 or other ratios?

The online gear calculators tell me 4.77 ratio when I enter in the rpm/mph/tire size -- that can't possibly be right?!

Thanks!
Andrew

07-09-2009	#1
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	RPM @ 80mph with 4.10 vs 3.45? Noticed that the rpm at 80mph is around 2500 rpm(as indicated on tach) in 6th gear, which seems high to me. Can anyone please verify, what rpm is expected with stock gearing vs 4.10 or other ratios? The online gear calculators tell me 4.77 ratio when I enter in the rpm/mph/tire size -- that can't possibly be right?! Thanks! Andrew Last edited by VetteMed; 07-09-2009 at 05:18 PM.