P72(VTiR)head +PR3(B16A) 81mm piston +B18Cblock=???

[ALLMTR996]

Why not use ITR pistons with B18c(P72)head? We tested a very similar setup, B18c block with ITR pistons and P72 head around about 12:1 comp. It went 13.4@103MPH, alot more potential.

Not worth going for b16a pistons.

If you have P30 and PR3 B16a pistons they will make more compression than B18C ITR ones.
PR3 Piston 6.01cc dome
P30 Piston 6.93cc dome
P73 JDM Piston 5.96cc dome

ALLMTR996