Its for a LS/4l80e so I need a lower cruising RPM for maximum economy than a 4 or 6 cylinder would.
I realize I might be giving up some acceleration, I never ran the numbers because Im afraid to find out how much
with 3.69 gears I only barely squeezed 24-26mpg from it. I should be around 28mpg with the 3.5x, maybe even 29, if I get the same ratio boost as going from 4.1 to 3.7 gave me. (almost 6 mpg)
Of course the goal is 30+ so I have some lightening to do, some better wheels and better tires, a good alignment, synthetic fluids, lean cruise, additional insulation, I have alot of untapped tricks still in the bag, car is only halfway done.