| Re: Cylinder Head Gasket Thickness. |
Subject: Re: Cylinder Head Gasket Thickness. by rklessdriver on 2012/7/3 22:31:44 ROL 31600 is steel shim .025 thick gasket with a 4.150 bore.... You'll have to drill the steam holes but that is really easy. Cometic will make anything down to .027 thick. Fel Pro 1010 is .039 and 4.166 bore but again you'll have drill the steam holes. Target quench in a normally aspirated 400 SBC depends on how much piston rock you get as it goes across TDC . Piston to cyl wall clearance, piston expansion rate, and engine RPM determine that.... but knowing what it all adds up to is just experience. I personally like to run them as tight as I think I can get away with.... in most N/A racing 4.155 bore engine I've built that's about .040.... but your never going to get it that tight because no one makes a head gasket thin enough without you decking the block. Looks like the tightest you can get it, is .050 if your willing to run a shim gasket and drill 4 holes. It would be a lot easier to just deck the block since you already know what the current deck clearance is. Will |
