Originally Posted by
fitbikeco
Im using drop in pistons you think their no machine work needed your wrong, when using forged pistons thay require more piston to wall clearance than stock cause the expantion rate is greater cause they are forged. so they require you to take out about .002 to .004 out depending on cylinder size
and as for trusting a machine shop once you get the block back you should still measure for cylinder taper and for out of round with a dial bore gauge whitch is pretty simple and for honing you can do that yourself with a ball hone pistons come with a spec sheet that says the angle of cross hatch
I agree with you especially if you plan on running high boost on the motor but you and I are the lesser of the majority. Most people i know and a lot of builds on Nasioc just drop them in. I would definitely check and measure myself but the reason to pay a machine shop is for them to do it right and for them to properly hone not me to cleanup their work. thats wy someone with subie experience is preferred for me