gear identification help!!

[dillon_94]

friend has a 3rd member laying around and were trying to figure out the gear ratio on it and here is the numbers on the ring gear C or g 2aw 4210e

[Egoracing]

Count the number of teeth on each gear.

[rcstreet1]

count teeth on ring and pinon then divide the ring by the pinon = ratio

[dirty white boy]

rotate the axles 10 revolutions an count how many times the yoke turns,..can figure it real close,..a 6:50 gear would be 6 an half revolutions of yoke,..6:33 would be 6 an a third turns....good luck...

[dillon_94]

thanks for the tips, it wasnt what we were looking for,
how big of a rpm difference will there be if switching from a 5.87 to a 6.33?
car was only turning 5500 before and just curious if anyone know how many rpms more to expect. thanks

[rcstreet1]

At leAst 600

[rcstreet1]

200 to300 per ratio

[Egoracing]

Rough idea, (RPM / old gear) X new gear = rpm
5500 / 5.87= 936.967632..... SO 936.97 X 6.33 = 5931.02 rpm.