i bought wesco pistons for my car i dont remember what comp they were. i know there flat top pistons with the eagle h beam rod . its in a ls motor. i know when i go get it tuned i need to know what kind of comp im running.

 

9.3:1 to 9.8:1. 9.3:1 would be .030 in the hole, 9.8:1 would be zero deck.

Of course, what you could have done is figured it out for yourself by going to Wiseco's website and seeing the dish volume of flat tops, and punching it into C-speedracing's calculator.