Can anybody tell me what my final compression would be if I use 9.5-1 and /or 10.5-1 Wiseco Pistons stock bore w/ my SE heads (9.5-1)? thanks

 

this should be simple, but it's not. you first have to figure out how much volume in cc's your heads have. there's an easy method to figure this one out using a piece of plexiglass with a little hole in it to ensure that your head is filled with a volume of liquid. you can fill the head with whatever suggested liquid you choose. atf works well, and use a syringe and get rid of all the bubbles. this will give your your head volume. then you have to bring your piston up to absolute tdc, and figure out how much volume there is left if any from the top of the piston to the head gasket surface. take those two figures and divide them into your total swept volume of your piston which is absolute tdc and bdc. see, it should be simple, but it'd be easier to ask the people who sold you the pistons. weisco should have this information available for the asking i'd think.

 

has a lot to do with the cam, but ive run compression checks on a lot of engines and you should have between 150 - 160 psi.

 

80" evo with SAMs performance heads, Woods W6, and 10.5 to 1. Not sure what it was fresh after the build but now it is 180 front 172 rear.