Quote:

Let's explore this, based on a comment from above...

A given motor has 9.5:1 with iron heads and we add aluminum heads and get to 10.5:1. Are there REALLY any gains from the CR increase, being that aluminum dissipates heat so fast??




In reality they pretty much became equal on the compression
aspect but the alum head is better on the detonation
and you still have the weight savings