What Compression With Stock Head Gasket?

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805moparkid

805moparkid

Slant and AFX Guy
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so i have some idea's rollin around and am wondering how much compression is safe for a factory steel shim (.021 thick) gasket?

11:1?

i will be milling so if i have to compensate for the .020 gain in head gasket i can.
 
I see no reason why it would not hold. Engines came from the factory with much more using steel shims.
 
RustyRatRod said:
I see no reason why it would not hold. Engines came from the factory with much more using steel shims.
Click to expand...

very true, guess the 12.5 motors would have been using them huh? what about the fuel/blower cars back in the day?
 
Max Wedge. 13.5 Yes, they used them.
 
I use composite head gaskets.....with Hylomar added to them.....on everything that has a composite head gasket.....I still use Hylomar on the MLS ones too.
 
cjh said:
I use composite head gaskets.....with Hylomar added to them.....on everything that has a composite head gasket.....I still use Hylomar on the MLS ones too.
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that tells me about nothing... lol

motor, compression?
 
805moparkid said:
that tells me about nothing... lol

motor, compression?
Click to expand...

If you wish to stick with a single shim steel type headgasket, with, say 0.100" shaved off the head, and flat top pistons,......make sure the surface finish is right on the head and the block.....too smooth, and it will blow....too rough, and it will blow.
I'd use Hylomar (spray pack) on the gasket, all the same.

http://media.supercheapauto.com.au/src/images/18035.jpg
 
I'm running a zero deck 170 with 38 cc chambers, with the shim gasket and no problems, even spraying over 200 hp nitrous.
 
cjh said:
If you wish to stick with a single shim steel type headgasket, with, say 0.100" shaved off the head, and flat top pistons,......make sure the surface finish is right on the head and the block.....too smooth, and it will blow....too rough, and it will blow.
I'd use Hylomar (spray pack) on the gasket, all the same.

http://media.supercheapauto.com.au/src/images/18035.jpg
Click to expand...

ive been running a steel shim for 5 yeas with .113 off the head and .025 off the block with flat tops

Charrlie_S said:
I'm running a zero deck 170 with 38 cc chambers, with the shim gasket and no problems, even spraying over 200 hp nitrous.
Click to expand...

wow thats like what... 12.5:1?
 
Kid,My engine has 13.1 with a steel shim gasket, coated with Hylomar. Later due to piston to valve clearance that made me nervous, I went with a composite at .39 compressed and coated it with gasgacinch. Still in the car.
 
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