Join Date: Oct 2001
Location: Willow Grove, PA
Using closed chamber pistons with open chamber heads
I'm having my 454 rebuilt and would like to get the compression up to 10.5:1. Talked to my builder today about using closed chamber pistons because nobody makes an open chamber piston that gives you decent compression with a 120cc head. He advised against it saying the dome is designed for a closed chamber and the air flow/burn would hurt horsepower. So if any of you have done this I would like to hear your results.
On another note, why don't piston manfacturers make a prodcut that their customers need? We have several choices for cyl. heads which almost all have 116cc to 120cc combustion chambers and nobody makes a piston to give you 10 to 11:1 compression??? Seems to me there is a huge need here to be filled and the first company to come up the product would clean up!
'70 Malibu, 454 w/Brodix Ovals, TH400 w/10" ATI, 12 bolt with 4:11's
'98 Camaro, M6, LS6 Intake, MTI lid, TB bypass, Ported Maf & TB, Pacesetter Headers, Catted Y, Texas Rumbler Catback, B&M shifter, FRA, !EGR