Originally Posted by Cosworth Bassie
Std head unskimmed measures 139 mm.
My head is 138.6 mm and the combustion chamber measures 46 cc.
Std 4 wd Piston Dome Volume is 19 cc, and my new pistons have 24 cc Piston Dome Volume.
Hi,
Thats odd,
my 4wd head has 44.5-45cc across them @ 138.2mm,
and yours being a 2wd head has got more CC as std, but with 138.6mm its only 1-1.5cc more than mine.
i measured 2x std 4wd pistons @ 19.5cc, the ones in my engine are 20.25cc.
i want to know for reference and to know what my c/r was before and now.