what would the most valve lift possable with standered pistions?
any one know the spec of courtney hi torque cams?
how much clearence is need between the valve and pistion?
on an x20xev ecotec engine.
I am not sure, but I know that the first stage of camshafts, (fast road) can be set up on a completely standard engine. So check the website of piper, kent, schrick, enem, catcams, courtney to see what lift the give for the fast road cams.
Most important to check, is not the max valve lift, but the valve lift on TDC (top dead center). This is the point that is dangerous to have contact valve with piston.