onebadZ28

i have a set of prc 220cc 5.3L stage 2.5 cnc ported heads, and a torquer v3 camshaft. Now my question is can i use the stock size head gasket or do i need to get a thicker one? if i need a thicker one how thick should i get it? also what would be a good brand to go with? come on chime in guys and help me on this one

99blancoSS

iTrader: (115)

Why would you need a thicker gasket?

PREDATOR-Z

@ questions:
1- are the valves sunk in the heads?
2- What LSA/ICL is the cam?

DONAIMIAN

iTrader: (18)

And are the heads milled?

onebadZ28

yes, the valves are sunk in the heads. The LSA is 112. The heads are not milled, but i hear in order to optimize the setup i should get them milled. Is this true, and if so how much should i get them milled. Thanks guys

99blancoSS

iTrader: (115)

I would leave them the way they are. You'll have raised comprssion as it is with the smaller chambers. I went with prc 2.5's my first time around, never had them milled and put up real good hp and torque numbers. 410hp 385tq on a mustang dyno.

PREDATOR-Z

I agree with Blanco, if you mill, you flycut.