[re-rx7]

Originally Posted by wbt It's all relative to cylinder pressure. Less boost, more compression. Less compression, more boost. These platforms are 11:1 and they seem to handle a decent amount of boost. From a piston standpoint....I prefer to run a flat top or dished piston vs. a pop-up as I think you get a better flame pattern resulting in more efficient fuel burn however that is a sacrifice in compression. In the pushrod days you could overcome that by decking the block and milling the heads. Not going to happen with the OHC stuff.

And fuel type?