Large valved 273

PRH said

I’m def not following the reasoning here.
The piston is nowhere near TDC when the valve is at full lift.

Click to expand...

Roger.... The limit is the depth of the notch you can put in the side of the bore and not have the top ring get into the notch. If the notch can only be so deep due to that, then the lift can only be so much. I've been working on the premise to not allow the top ring to overlap even partially over the notch at TDC... sure wouldn't do the ring seal much good to allow it to do so!

I've been also looking at other pistons with a much bigger bore, and offset boring the block towards the intake side to get completely away from having to notch the bore at all with a 2.02" valve. Looks doable, but boy is it close!!