427 Head Gasket
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Instructor
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427 Head Gasket
Just wondering what brand/type you guys are using for the head gaskets ? I see some of these replacement ones have different water passages that require drilling the block which I don't want to do.
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The ones you are referring to 1045 are for a small block Chevy not a big block Chevy .
also there are issues with some of the gaskets and cooling passages for the big blocks that I hear people might not be aware of and cause overheating .
also there are issues with some of the gaskets and cooling passages for the big blocks that I hear people might not be aware of and cause overheating .
Melting Slicks
Joined: Mar 2010
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From: Randolph nj
Im sorry we just put some heads on my buddys small block last month ,,go on summit and look them up ,when I did my 454 we used 1027 felpro check the bore size
Last edited by forman; Jan 29, 2020 at 07:42 PM.
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I am asking on this thread as I hear there are some gaskets that are for parallel flow and some for series flow cooling passages.
Wondering what people have actually used without drilling out their blocks.
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Le Mans Master
Joined: Sep 2001
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From: Unreconstructed, South Carolina
The 1027 Fel Pro gaskets are only for aluminum heads. I have a L71 with iron heads.
I am asking on this thread as I hear there are some gaskets that are for parallel flow and some for series flow cooling passages.
Wondering what people have actually used without drilling out their blocks.
I am asking on this thread as I hear there are some gaskets that are for parallel flow and some for series flow cooling passages.
Wondering what people have actually used without drilling out their blocks.
What year is your block?
What does bore measure?
How thick do you require?
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Le Mans Master
Joined: Sep 2001
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From: Unreconstructed, South Carolina
Those are felpro Performance
below is felpro OE replacement type ... that'd be my pick ... unless you really Need something more
head gasket 8180 PT-2 ... $19 each at summit ... versus $45 each for the 1071-1
https://www.fme-cat.com/overlays/par...0CORVETTE&vin=
for reference ... OE replacement full gasket set for rectangle port 427 is sealed power 260-1081 or felpro 2601081 ... price diff! g'luck!
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Safety Car
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From: Clymer PA
How far down in the bore is the piston? If it is all original (the block hasn't been decked), typically the piston is like .020" down in the bore. Optimal quench for an engine is usually around .040", have you considered running a .020" steel shim gasket? That would get you to .040" quench and it would also pick you up a little bit of compression if you were running a .040" gasket. You would obviously want to check piston/valve clearance on this if you decide to try that. Just an idea.
Drifting
Joined: Jun 2015
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From: Doctors Inlet Florida
How far down in the bore is the piston? If it is all original (the block hasn't been decked), typically the piston is like .020" down in the bore. Optimal quench for an engine is usually around .040", have you considered running a .020" steel shim gasket? That would get you to .040" quench and it would also pick you up a little bit of compression if you were running a .040" gasket. You would obviously want to check piston/valve clearance on this if you decide to try that. Just an idea.