Head Gasket Discussion One More Time
Thread Starter
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
Head Gasket Discussion One More Time
Hey guys,
I've noticed a lot of you are running the FelPro 1094 shim gaskets with aluminum heads.
A lot of you say not to run this gasket with aluminum heads due to electrolysis.
Can we have a check in on this again?
I'm ready to order up a couple of sets of them for some engines I'm building.
The pistons are already .022 in the hole and I'd like to use them to get the quench down as well as possible.
What say you guru's of gaskets?
I've noticed a lot of you are running the FelPro 1094 shim gaskets with aluminum heads.
A lot of you say not to run this gasket with aluminum heads due to electrolysis.
Can we have a check in on this again?
I'm ready to order up a couple of sets of them for some engines I'm building.
The pistons are already .022 in the hole and I'd like to use them to get the quench down as well as possible.
What say you guru's of gaskets?
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
OOPS! It's a 1003, not 1053. .41 compressed thickness. Fel Pro also makes a 1014, at .38. Someone correct me if I'm wrong. These are for 350 Chavy w/aluminum/Iron heads. Will not work on the LT1. Hope this helps
Thread Starter
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
Oh no.......
.041 ans .022 = .063 = Bad Quench.
Need thinner gaskets.
I have used the steel shims on numerous engines with iron heads.
Never had any aluminum ones back in 'the day'.
Several folks on here are reporting running the 1094 which is the .015 thick steel shim gaskets WITH aluminum heads and are having no problems.
I'd just like to confirm that before ordering them up.
.041 I'm not going to be too happy with as I'm going to be right up against 10.5:1 compression anyway.
Sooooo , need to minimize the quench area.
.041 ans .022 = .063 = Bad Quench.
Need thinner gaskets.
I have used the steel shims on numerous engines with iron heads.
Never had any aluminum ones back in 'the day'.
Several folks on here are reporting running the 1094 which is the .015 thick steel shim gaskets WITH aluminum heads and are having no problems.
I'd just like to confirm that before ordering them up.
.041 I'm not going to be too happy with as I'm going to be right up against 10.5:1 compression anyway.
Sooooo , need to minimize the quench area.
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Melting Slicks
Joined: Dec 2001
Posts: 2,437
Likes: 1
From: Gainesville Fl
i heard that impala gaskets bump up compression .3:1 so.... if your motor (LT1) is 10.5:1 stock then it should bump it up to 10.8:1! that would be a halfway decent increase in power i would think. mine is 10.8:1 stock so i would be at 11.1:1 with the gaskets. i hope that gives me as much power as it would seem like!
Drifting
Joined: Oct 2003
Posts: 1,594
Likes: 0
From: CALGARY ab
Originally Posted by VetNutJim
Oh no.......
.041 ans .022 = .063 = Bad Quench.
Need thinner gaskets.
I have used the steel shims on numerous engines with iron heads.
Never had any aluminum ones back in 'the day'.
Several folks on here are reporting running the 1094 which is the .015 thick steel shim gaskets WITH aluminum heads and are having no problems.
I'd just like to confirm that before ordering them up.
.041 I'm not going to be too happy with as I'm going to be right up against 10.5:1 compression anyway.
Sooooo , need to minimize the quench area.
.041 ans .022 = .063 = Bad Quench.
Need thinner gaskets.
I have used the steel shims on numerous engines with iron heads.
Never had any aluminum ones back in 'the day'.
Several folks on here are reporting running the 1094 which is the .015 thick steel shim gaskets WITH aluminum heads and are having no problems.
I'd just like to confirm that before ordering them up.
.041 I'm not going to be too happy with as I'm going to be right up against 10.5:1 compression anyway.
Sooooo , need to minimize the quench area.
Race Director
Joined: Aug 2003
Posts: 11,043
Likes: 3
From: San Jose Pat Tillman - American Hero
Originally Posted by 1996man
i heard that impala gaskets bump up compression .3:1 so.... if your motor (LT1) is 10.5:1 stock then it should bump it up to 10.8:1! that would be a halfway decent increase in power i would think. mine is 10.8:1 stock so i would be at 11.1:1 with the gaskets. i hope that gives me as much power as it would seem like!
There was some pretty decent math to back it up, so I don't believe it was just somebody talkin' out their azz...
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Perfusion
I remember a recent thread about this... The experts' opinions were that the bump in compression wouldn't be something you would be able to feel...a few HP at best.
RACE ON!!!
Thread Starter
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
CFI-EFI....
I was thinking the same thing.... Steel Bolts, Aluminum heads...
That "should" keep everything at the same potential as far as galvanic activity is concerned.
Another thought is the steel shims are a lot harder (are they?) than the aluminum head. Will this cause a thing called brinnelling (sp) ?
I'd like to get squish right but don't want to sacrifice a good set of heads to find out if these gaskets will work.
Come on in guys, I know there's some of you out there running them 'cause I did a search on it and FOUND YOU!!
Come on and check in here and let is all know about your experience with those gaskets.
I just checked the gasket that came off a standard iron head L98 and it's a composite .047 thick gasket.
Guess quench doesn't matter much when you're running 8:1 compression
I was thinking the same thing.... Steel Bolts, Aluminum heads...
That "should" keep everything at the same potential as far as galvanic activity is concerned.
Another thought is the steel shims are a lot harder (are they?) than the aluminum head. Will this cause a thing called brinnelling (sp) ?
I'd like to get squish right but don't want to sacrifice a good set of heads to find out if these gaskets will work.
Come on in guys, I know there's some of you out there running them 'cause I did a search on it and FOUND YOU!!
Come on and check in here and let is all know about your experience with those gaskets.
I just checked the gasket that came off a standard iron head L98 and it's a composite .047 thick gasket.
Guess quench doesn't matter much when you're running 8:1 compression
Thread Starter
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
I used to spray them up with aluminum paint to help the sealing.
Never had any problems using them with iron heads.
They were 'the' gasket to use in HP applications.
Never had any problems using them with iron heads.
They were 'the' gasket to use in HP applications.
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
I did use the copper SCE .021" on one engine, sprayed them with the copper gasket sealer/adhesive and put them on, started the engine and got it up to temp for @ 15 minutes, then let it cool back down and retorqued the heads, no problems.