Originally Posted by
Smittydidit
Im with the higher gearing thing, Correct me if I'm wrong here, If you drop to a 60 Spur and step up to a 14 pinion the ratio remains the same ?, but if you only step up to a 13 pinion it then changes the ratio and the way the truck pulls off the bottom and middle??
Craig,WC, you guys want to chime in here?
It has to be proportional.
100/25 is 4:1, 120/30 is 4:1. Changing the spur is usually a case of pragmatism, you only have room for so much pinion. If you want more gear, you need a smaller spur.
My 4 pole makes so much torque compared to the two pole it's crazy. Gear doesn't seem to be nearly as important. To get my two pole stuff to run on the bottom, I had to run less gear and boost it on the top end so it would run in the straight.