Domed pistons

99dodge318La said

I am just wanting to get some feed back on these pistons before I pull the trigger and order them. The part number is
DODGE Keith Black KB Performance Piston and Ring Kits KB399KTM-020
With factory heads what compression ration would these get me up to. I have access to AV gas but I'd like to be able to run 93 if possible.

The engine is a 76 318.

Click to expand...

Go back to the UEM home page, look the pistons back up in the KB catalog, in the right hand column of info there is a range listed of "possible" compression ratios based on chamber volume

There are too many variables to give an accurate "guess".......what's your deck height......what's your chamber volume.....What heads are you running, iron or aluminum.......what head gasket are you using??????????
These are "things" that affect static compression ratio, then there is the question of what cam shaft are you running, how is it degreed as that will affect dynamic compression ratio which generally is the real "tell" as to what octane gas you need to run..........if foggy memory serves me right, 180 psi cranking compression is the limit for pump gas......those smarter than me will chime in if I am wrong.