Re: Using the wrong piston...
T-56 said:
I've got a burnt piston @ #3 cyl and a new JE piston that the valve reliefs are backwards for that hole. I understand that cutting the ex. side to clear the in. valve will drop the compression on that cyl .1-.2pts. I have fly-cut lots of pistons but never on something w/ boost. Will be running 8psi in a daily driver (NO racing). Is there any reason not to do this?
Well, consider that I have "no" idea what your engine building experience is, so I apologize if you knew this, but one very obvious reason not to do that is because it would throw off the balance of the motor.. I am assuming you are talking about just slapping a piston in and putting it back together. Wouldn't the proper way be to pull the motor apart and have it rebalanced by a machinist and reassemble?
Just sounds half-ass.. (no offense). I don't know if you have a Syclone or a hybrid vehicle but whether you're "officially racing" or not has nothing to do with it, if you go WOT whatsoever it's really all the same, just a matter of degree. Either the motor is able to sustain itself at WOT, or it isn't. If there was a balance problem or a detonation issue, it would still be present no matter how little you went WOT. I guess a better question would be, why do you have a burnt piston to begin with? (Especially since you are "not racing" :lol: ) Cure the disease, not the symptoms.. so to speak. I would ask for some tuning help to find out what's causing your meltdown in the first place.
