Z clear your PMs, i have some questions for you about the 4.08s....
also Z you use the MT radials for street use ?
PR370Z , I just noted most cruising speeds and what the RPM is at... These are estimates that I am taking from a before and after video that I took, but the difference isnt all that much, but if you cruise at 80-85 I am sure your gas mileage will suffer some what.
STOCK FINAL DRIVE
60 MPH - 2,350 RPM
65 MPH - 2,600 RPM
70 MPH - 2,750 RPM
75 MPH - 2,850 RPM
80 MPH - 3,000 RPM
WITH 4.08s
60 MPH - 2,500 RPM
65 MPH - 2,800 RPM
70 MPH - 3,000 RPM
75 MPH - 3,200 RPM
80 MPH - 3,400 RPM
Crusiing down 19 Miles of Highway at an avg of 69.2 MPH my MPG was 26.1