will going from the 13t clutch bell to a 14t clutch bell make a big doference? what about going to a 15t cluth bell?

I've heard that truggies (Hellfire) are tough on clutches and that going up to a 14 or 15 will increase wear of the shoes significantly. But, if you want more top speed -------------

It will have to work harder to get moving, so it will cause a little more wear,Changing te bell makes a difference. Not too much but going up one tooth will help if you are running out of RPM on the straight