thicker metal head gaskets

[smoker]

I skimmed 40thou of my head when I rebuilt so i reckon my CR is 8:5 - 9.0:1. No problems with detonation so far, i plan on using water injection if I hear any when I up the boost further.

[sideways danny]

I make that about 8.7:1

[30psi]

Yeah I make it 8.65:1 with 83mm pistons, and with 84mm pistons 8.85:1

[sideways danny]

Originally Posted by 30psi

Yeah I make it 8.65:1 with 83mm pistons, and with 84mm pistons 8.85:1

do you know the exact chamber size? I had to reverse engineer the calculation to work that out.

[30psi]

I used reverse technology as well to provide a combustion size of 64.61cc.

[CNHSS1]

the only reverse technology i use is to get off the driveway in the mornings

[smoker]

Originally Posted by 30psi

Yeah I make it 8.65:1 with 83mm pistons, and with 84mm pistons 8.85:1

I'm using 0.5mm oversize pistons so I guess I have 8.7$:1, hope to gain more power with less boost pressure & lag....or it might blow a hole in a piston
Tested the mileage again and it's come out at 36mpg so i think it's helping the economy a bit