Compression Ratio per Camshaft Size

JedIEG said
This is understandable quite well, however I have not seen a formula to take measurable parts that make up geometric or dynamic compression ratio and predicts cranking compression tester cylinder pressure. And all of that is just a proxy for peak cylinder pressure which is the real thing we are trying to control.

If we all had all the time and money in the world we would just buy a all the combinations of parts to get the 195psi cranking compression and it doesn't seem like anyone has a way to predict it, just hand waving 'it will be good with x,y,z'.

AJ- what static CR are you running with those three cams and what test pressures did you see with those?

Also my combination is a bit larger than yours so my hope is going up a little in duration to that 230 cam would provide similar manors to your proposed 228 cam.

If you are not willing to do everything to run higher than orthodox compression ratios then follow RRR’s advice.

If you want to run your coolant at 195 plus degrees than 10:1 is about it. That’s if everything else is correct.

And ignore the advice that says if the compression is too high you need to reduce total timing and that’s power loss. That’s 100% crapola.

If you understand why you need vacuum advance then you understand why reduced total timing doesn’t mean you lost power.

I’d rather run 12:1 and 30 total than 10:1 at 35 total. And it will make more power.