The change would be close to 10% or (4.57 - 4.10)/4.57 = 10.28 %. So your RPM would be roughly the same at 50 mph that you now have at 45.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!