Quote:
Originally Posted by Gasoline Fumes
My CRX HF transmission is 1800 RPM at 60 MPH. I'd have taller gearing if it existed!  |
I cruise at 1600rpm at 60 and 1850rpm at 70 in my civic
. Gear ratios ranging from 2.645 to 0.405 and a final drive of 4.811 (overall 0.513).
Quote:
Originally Posted by Old Mechanic
My 76 Z (77 was first year for 5 speed) originally did not come with a 5 speed, it had a 4 speed with 4th being 1to1 ratio.
It came with a R200 3.54 ratio differential. I swapped out an 81 5 speed which had a .75 overdrive 5th gear.
That made the overall final ratio 2.65 which works out to almost exactly the revs per mile as the VX was factory, 1k rpm (engine) for every 30 mph speed. I swapped the rear end for a 3.90 which brought the revs up to about 2200 at 60 versus the 2000 before (again almost exactly the same as the VX stock).
I felt, at the time, just as Balto felt about the final drive being too tall, but driving for mileage was not my goal in 1992.
Everybody's driving environment is different and I'm not trying to argue any point. The rear axle change in my Z followed Balto's thinking exactly, but today I would not do it.
regards
mech
|
Remember, terrain is also an issue, it's extremely hilly in California.
To be honest, if I had the option to do it again, I would. If I had the knowledge then that I do now, I would have simply tossed a GT15 turbo on it to help with down-low power, and it would have eliminated my complaint about being so gutless down low.
[Edit]: I'm also way better at driving a manual now, so it probably wouldn't bother me as much now as it did back then.