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Bogger01999

01-01-2019 08:58 AM

Head gasket thickness

Looking for correct head gasket for my stock carb’d vortec 5.7 with gm 395 cam. I’ve read lots of post with people saying .015 to.038 compressed thickness.

I order the felpro 1094 before doing any research 🙄 now I’m having second thoughts.

BillK

01-01-2019 05:48 PM

In my opinion you should not use the 1094. It is a steel shim gasket and if you have the stock Vortec heads in my opinion they are too flimsy to seal real good with those.

Truthfully all you need is the stock replacement Mercruiser or FelPro marine gasket. They should be .038 thick.

dereknkathy

01-03-2019 06:28 AM

The .020 may be a half a point of compression. Around 2hp loss.

Bogger01999

01-03-2019 07:51 AM

I’ll just have to pull the head and see how far down the piston is. I was hoping to increase compression a little with a thinner gasket. Was hoping some has done this with the same engine

Bogger01999

01-05-2019 02:23 PM

Quote:

Originally Posted by dereknkathy (Post 4666542)

The .020 may be a half a point of compression. Around 2hp loss.

pulled the head and deck height is .025, the gasket appears to be .020 after putting the numbers in an online compression calculator stock this engine is 9.4:1 and using a .015 will bring it up to 9.5:1

Bogger01999

01-05-2019 02:29 PM

Quote:

Originally Posted by BillK (Post 4666273)

thanks for the imput. this engine used a .020 head gasket.

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