Engine knocking when warm

Oct 20, 2011
318
6
38
Engine was knocking last time i raced, took the blaster out loads of times after this cut the life out of it let her heat right up no knocking. This has only happened twice before, what could it be? Always run on high octane gas.
 
well where do you live? if you live in the northern states the temps have dropped way low enough to be re jetting by now. if you were right on with your summer jetting your winter jetting is going to be waaaayyyy off you need to go up at lest 1-2 jet sizes depending on where you live
 
I live in ireland and the weather stays sh*t here all year round lol, think whitty 21 is right need new base gaskets
 
It helps the motor breath better. the stock blaster carb is a bit on the small side for the motor. with an aftermarket pipe and larger carb 30mm or so, you will notice a pretty good power increase