Originally Posted by
Fiesta_Jed
So the high comp engine will make more power where the low comp engine has loads of ignition advance?
Yes because if you are running too much ignition advance you make peak power too soon, so to avoid doing that you have to put less advance in than the fuel can take, which makes it lazier.
So if you have run out of gains from ignition advance before you hit det, your cr is too low.
I always thought that the more boost an engine had, the more ignition advance it "needed" and failure to do this would result in a loss of power. Especialy when running 30psi+
The more boost you have, the more you fill the cylinder, so the more risk of detonation you run (especially on high comp where there is less space so the mixture is more compressed) so the less advance you can handle.
I suspect you are confusing an engine needing more ignition retard when it comes on boost. More ignition retard = less ignition advance
Confusing how some people misuse the terms which doesnt help when you are using.