I have not tried what I wrote but CP pistons claim that their 11.5:1 CR pistons used with proper rods with the rightfuel timing ( that means the gas burns instead of explodes) well you can manage an RSX (for example) with the Forced Induction + Nitrous Oxyde System that means , depending on whatever you did put under the hood, you can easily run 10+ psi when used with the right pistons, valve springs rods and all the mess.. but if you wanna go less than 10 pound then dont even be afraid of the result, your honda engine will handle it easily