1985xjlaredo
NAXJA Forum User
- Location
- Kansas City
Here is the equation I am working with: MPH x Total Gear x 366
Tire Diameter
= RPM at given Speed
I am turning about 4000 at 60 mph. My MPH is at 60 and my tire diameter is 28.28" (225/75/15). The only variable is my gear which I am trying to figure out. But something seems a miss. Am I doing something wrong? Does total gear mean my final ratio?
Using the above formula I should be turning 3250 with a 4.56 gear. It doesn't really feel like I have a 4.56 but that seems what it is when Im turnin that high RPM on the Highway. Im going to figure what gear I have by getting close to the 4000 RPM range by changing my gear ratio variable. Any other Ideas?
:cheers:
Tire Diameter
= RPM at given Speed
I am turning about 4000 at 60 mph. My MPH is at 60 and my tire diameter is 28.28" (225/75/15). The only variable is my gear which I am trying to figure out. But something seems a miss. Am I doing something wrong? Does total gear mean my final ratio?
Using the above formula I should be turning 3250 with a 4.56 gear. It doesn't really feel like I have a 4.56 but that seems what it is when Im turnin that high RPM on the Highway. Im going to figure what gear I have by getting close to the 4000 RPM range by changing my gear ratio variable. Any other Ideas?
:cheers: