If you get a negative as your compression result, then yeah you've put the pistons through the cylinder head.

 

Yeah, i got a -.007 in the piston to deck height

 

Ah that is different. All that means are the pistons are sitting -.007 out of the block. I've heard of people going .02 out the block, so .007 shouldn't be a problem. You would definitely want to clay it though, to make sure the valves won't hit the tops of the pistons. I can't remember what piston-to-valve clearance needs to be. I wanna say .040"?

 

Ok, cuz i was doing the calculatoins and i did a complete B16A engine, only thing i changed was the pistons to B16B. I got a CR of 11.91:1 a Rod/Stroke ratio of 1.73 but then i got the piston-to-deck height of -.007.

 

Quick question on rod to stroke length. Would it be better to go with a stroke length of 1.73:1 like in the b16 or 1.58 like the b18, cuz i read that the higher the stroke is to 2 the better for high reving engines, like formula cars meaning that it stays in the power band longer while the b18's lower stroke helps on torque.