head gasket options
Thread Starter
Staging Lane
Joined: Jun 2014
Posts: 98
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From: brainerd mn
head gasket options i have a ls1 bored to 3.905 was thinking ls9 gaskets but would like a lil more compression then they give
ls1 3.905 bore 4in stroke -7cc pistons piston sticks out .015 317 heads 72cc chamber when they block was at the shop they didnt put any special finish on it if they even milled it at all just told them to clean it up if needed heads arnt done yet so i can get them done any way was looking at the commetic .040 thick gasket over the ls9 .051 but heard u need almost a mirror finish for that gasket
thanks for any input shooting for around 10.5:1 boosted setup on e85
ls1 3.905 bore 4in stroke -7cc pistons piston sticks out .015 317 heads 72cc chamber when they block was at the shop they didnt put any special finish on it if they even milled it at all just told them to clean it up if needed heads arnt done yet so i can get them done any way was looking at the commetic .040 thick gasket over the ls9 .051 but heard u need almost a mirror finish for that gasket
thanks for any input shooting for around 10.5:1 boosted setup on e85
Teching In
Joined: Jul 2014
Posts: 24
Likes: 0
From: CT
Here's some input only imo....from what I've read .040" is pretty ideal quench. With the pistons out of the hole .015" the ls9 gaskets look like the better option. They'll still put you at .036" vs the .025" with the cometics. I would do ls9 gaskets and not look back.
Last edited by 02blksscmro; Apr 14, 2015 at 08:13 PM. Reason: Sorry Drinkin'
IMO, the Cometic MLS gasket is the best on the market. It does need a better finish than most gaskets. But any decent machine shop should be able to handle that.
Never use the head gasket to adjust compression. The very small change in static compression won't gain you anything.
Use the gasket to set quench. That's where you can make huge gains in performance, efficiency, and longevity. All part of the blue printing process.
Never use the head gasket to adjust compression. The very small change in static compression won't gain you anything.
Use the gasket to set quench. That's where you can make huge gains in performance, efficiency, and longevity. All part of the blue printing process.
