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Re: Piston to valve Clearance?
At what point are you measuring PTV? To get an accurate number the motor would need to assembled and rotated over, I would have to look at my paper work but I think ptv will be closest on the exhaust stroke as the piston comes up on TDC.
The evo9 piston will be a 22mm wrist pin, did you have 1g rods machined for the bigger wrist pin? Or are they evo 9 rods?
If the piston is down the hole a little that's fine. When it sticks out is when you can have issues. Also what size valves, valve springs/ retainers, and what cams/cam gears?
I want to say my race motor was somewhere around .025" ptv on the exhaust side and I would shift at 10,000rpm.
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Moon taxi: 9.45@156.9 mph 41psi 2011... Letting people down sense 2012.
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