
MR2 Rich wrote:Does compression directly relate to power? I.e if you have the exact same spec engine one with 8:1 forged pistons and one with 9:1 would there be a power difference?


Yep- higher compression









You can run more boost without dropping the compression, but that typically involves less advance, so combustion takes place later in the cycle with risks of damage to the cylinder walls as they are exposed to high temperature/ pressure spikes.


Differing opinions on which way to go in modern engines.






