[Argess]

I think you are "over-worried". Don't forget, an unloaded starter will rev to the moon. Your starter should rev to the point it is putting out max power to the load that it is capable of. So, the good news is your engine should crank at least as fast as it did before.

Now more good news, since that starter rpm will be greater with the higher tooth ring gear, the starter will be in a more effecient operating range, and the engine should actually crank faster.

But I"m not sure.....LOL. Oh well, you'll find out eventually.

EDIT: Electric motors start with max torque at zero rpms, and the torque drops linearly to zero at max rpms. During this time, HP of the motor builds to max at 1/2 of max unloaded speed. You can be sure that during cranking, the motor is not likely to achieve 1/2 max starter speed. So, the faster your starter can spin, the more power it actually puts out, and the faster your cranking speed will be.