White.Lightning

iTrader: (53)

I am not sure as to what pistons and head gasket I should be running to achieve my goal of 8.5-9.0:1 CR. It will be a 347ci, stock crank, Eagler H beam rods, Ross/Wiseco/Diamond piston, Z06 cam, Cometic gaskets (unsure of thickness), stock 6.0L heads mildly ported and polished, Carb style intake, 90* elbow to a 90mm Nick Williams TB.

Power adder is a D1SC pushing 15 'ish psi through an M6/Spec4/12bolt.

Current engine mods are: FLP LT's, catted ypipe, Borla catback (open), Z06 cam

(Irrelevant mods are: Whiper lid, Z06 intake, ASP crank pulley, Z06 clutch)

Questions are: (to achieve my goal CR of 8.5-9.0:1)
1. Which piston should I get and what size valve reliefs (brand and PN# would be helpful)?

2. Which thickness head gasket should I get?

3. Should I upgrade the current valve springs that were installed when the Z06 cam was put in for some Comp or Crane springs?


Thanks
Andy

White.Lightning

iTrader: (53)

Well word on the street is that by adding the 6.0L heads and GM MLS, the compression drops by nearly 1....so that would put me right at 9.0:1 roughly. I will see how that works for the interim.

Andy