So let's talk about torque .Let's talk about engine rpm .Lets talk about gearing . . If I gear a 4.3 with a 3.73 gear it goes 2200 rpms at 70 will have a larger tow load than the 4.3 with a 3.31 gear turning 1500 rpms at 70 mph . But the terminal speed of 3.31 geared vehicle will be alot higher than the terminal speed of the 3.73 gear before rev limited or blown up . So racing through flat cornfields in the west in same powered same wieght s10 the 3.31 gear wins . If sawing wood of different diameters ,hardness for firewood is the deal then the seven pin factory sprocket is the way the chain link count is correct and fits easily . If racing is what your doing might want to look at gearing in my opinion. Cause no matter the percentage of error the formula has the chain speed will be higher at all engine rpms from 1 rpm to 13500 for the 11 pin . A seven pin saw has to turn around 20000 rpm to have the same speed by the formula as a 11 pin at 13500 rpm . At 13500 with a 7 pin the 11 pin has to turn 8600 engine rpm to match chain speed. When saw racing typically everyone gets the same diameter and hardness of wood unless you choose to cut in a knot