so i pulled the head off to do a head gasket and i noticed the piston has so markings on them... they say L2455 75mm... are these stock?

 

oh ya this is a pic of the pistons...

 

Ummm, those aren't stock pistons to the best of my knowledge. The stockers are dished.

 

SpeedPro .030 flattops. They raise your compression around 2 points. If you keep 'em you're just begging for trouble! They need to go away!

http://store.summitracing.com/partde...M&autoview=sku

 

whats wrong with them besides more compression? cant i just run less boost and make the same power?

 

Is that a serious question?

 

In these engines? no, sorry but those pistons are just asking for trouble

 

om well since there pistons are 3.810 and stock is 3.800 do i just need to buy new pistons... i have stock pistons lying around can i make them work? so these pistons are probley the reason i couldnt get the thing to run good withut it knocking...

 

bingo

 

well that sucks... i guess race gas will have to do... lol