Cranking Compression

lil low for aluminum heads.jmo

if you are at a 1500 minnesota elevation , it's more like 9.2 comp.

I would mill the heads, and or use a thinner gasket to get to 170.

then again going to even 175psi [like going 9.5 to 9.9 comp] on a 400 hp motor is only worth around 5hp...
You would maybe feel more response, maybe.
going to 180 would do something.

I kinda thinking don't worry about it.


in all reality, wide cl's give up 'some' peak power to a similar narrow cl, but wider cl's make power every where while the narrow cl's are light swithes....you don't wanna be caught with the lights off.lol