Chevy Corvette Forum banner
1 - 9 of 9 Posts

·
Registered
Joined
·
779 Posts
If it is an auto, put it in third gear and drive 70 MPH- the RPMs divided by 1000 will match the gear ratio. So if at 70 MPH you are running at 3150 RPM (±), you have the 3.15 performance gear. If you are running at 2730 RPM, you have the 2.73's. :woowoo:
 

·
Registered
Joined
·
779 Posts
So.... What did you find out?
 

·
Premium Member
Joined
·
9,048 Posts
its not a bad ratio for a stock engine that you don t run hard...my C5 gets over 28mpg with it... if you want more performance [ I have a C3 for that] increase the ratio to 3.42 or 3.73 ...will make it more responsive at low end but will lower mpg
 
1 - 9 of 9 Posts
Top