Originally Posted by bboy
Do you mean change to a stiffer spring, or tighten down the screw nut further?
u can change to a stiffer spring if ur current one is those that is really soft till u need to tighten the screw a lot!...
U might also want to change to a harder clutch shoe to prevent clutch slip
Btw i have no problem with the tz 5 port with 6.5 venturi using skyline or JPL or RB 6mm pipes.... the engine is very fast, high torque, easy to tune and have gd temp.