ELSpool

I'm building up a Y8 for boost. I have SRP 9:1 comp pistons, however, I want my compression to be higher as I want to make my power on pump.

Sorry if I'm not using the correct term, but how much can the head be milled/decked to raise the compression safely to around 9.8:1

Are there any side affects to doing this, could cause more chances of det?

Thanks

SOHC_MShue

something you could do to make your compression a little higher is to just use the center layer of your headgasket. I believe its the center layer or something like that. Basically making it even thinner than the stock y8 head gasket. Not sure if this will raise your compression higher than you would want though.

kommon_sense

I don't know if you can mill the head enough to get that much of a bump in compression. Is it too late to just get the SRP 10.5:1 pistons and a thicker head gasket?

ELSpool

I asked because I bought them at a crazy price. So I would not bother with getting new pistons, and 10.5:1 is alittle too high for my boost project.

JDMCRX

iTrader: (2)

Im not sure but .10th is like .2th on the comp ratio i dunno anyone can help??

JDMCRX

iTrader: (2)

You would have to CC the head I believe the difference between the Z6 head and the Y8 head is 2cc so mill the head and CC it and there u go.