Fel-Pro Head gasket 8347PT 1 or 1013 or ???

Fel-Pro Head gasket 8347PT 1 or 1013 or ???

Joined: January 26th, 2011, 10:15 pm

April 1st, 2012, 5:11 pm #1

I purchased the Fel-Pro gasket set for my new build and it came with the 8347PT 1 head gaskets. I was going to buy the 1013's, but if these are good gaskets I'll use them and save $80.

I did a search and it's unclear if the 8347's compress to .047 or .041. Does anyone know for sure or should I call Fel-Pro?

My pistons are in the hole .025. A .72 quench seems really big and I read may cause performance issues.

Thanks.


Jim
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Joined: November 18th, 2003, 6:49 am

April 1st, 2012, 9:18 pm #2

I used the 8347PT for years and never had an issue, but last build, 5 years ago, i used the 1013 for a change, and still havn't had an issue. I'd just run the ones you got and save the bucks.
I have allways used .041 compressed when working numbers with the 8347PT
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Joined: December 5th, 2004, 11:36 pm

April 1st, 2012, 9:35 pm #3

I once measured the compressed thickness of the felpro 8347PT1 and came up with 0.047.

Did it on the engine with the head torqued to 110 ftpnds.

I cut a section out of a used once gasket wide enough to fit a feeler gauge between the head and deck right thru into the chamber. Torqued the head and measured.

This was when I was having piston to valve issues and was chasin every thou.

Also just measured an un-compressed brand new 8347PT1 for reference to your gasket and came up with 0.056 toward the edge of the gasket.

Hope it helps!
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Joined: January 10th, 2002, 5:53 pm

April 2nd, 2012, 3:10 pm #4

I purchased the Fel-Pro gasket set for my new build and it came with the 8347PT 1 head gaskets. I was going to buy the 1013's, but if these are good gaskets I'll use them and save $80.

I did a search and it's unclear if the 8347's compress to .047 or .041. Does anyone know for sure or should I call Fel-Pro?

My pistons are in the hole .025. A .72 quench seems really big and I read may cause performance issues.

Thanks.


Jim
Never had a problem with them.

1967 Falcon 4 door 351C-4V
1970 Mustang 351C-2V
http://raceabilene.com/kelly/hotrod
Owner built, owner abused.
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Joined: March 9th, 2004, 3:37 pm

April 2nd, 2012, 5:20 pm #5

I purchased the Fel-Pro gasket set for my new build and it came with the 8347PT 1 head gaskets. I was going to buy the 1013's, but if these are good gaskets I'll use them and save $80.

I did a search and it's unclear if the 8347's compress to .047 or .041. Does anyone know for sure or should I call Fel-Pro?

My pistons are in the hole .025. A .72 quench seems really big and I read may cause performance issues.

Thanks.


Jim
I rebuilt with the 8347PT gaskets. I blew one head gasket because of a faulty advance limiter on the stock dizzy. I replaced that side with a 1013. That was 5 years ago and countless attempts to find the weak link...

No problems, yet. I think either gasket will work fine.
Good luck,
James P.
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Joined: January 26th, 2011, 10:15 pm

April 14th, 2012, 3:54 am #6

I went ahead and purchased the 1013's since I had a funny feeling the 8347PT1 was really .047.

We'll the 1013 came in and I got the digital calipers out. Here are my measurements uncompressed

1013: 46, 46, 48, 46
8347PT1: 52, 54, 54, 53

I measured 4 different areas on the gaskets.

The 1013 avg is .047 and 8347PT1 is .053

This puts them .06 differnce and since the 1013 is .041 compressed I would assume the 8347PT will be around .047 compressed.

Anyway, I just throught Id share.

Fel-Pro 1013 Top & Fel-Pro 8347PT1 Bottom


Fel-Pro 8347PT1 over laying the Fel-Pro 1013 (Bottom)


I wonder why these are so different ??? :-O

Jim
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Joined: December 16th, 2003, 1:59 am

April 14th, 2012, 8:37 am #7

the chamber ring on the 1013's is upside down for the valve notches... then where you'd want the ring to follow the notch in the bore, ya gotta wonder if it's gonna seal?

there'll be phantoms, there'll be fires on the road... and the white man dancing
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Joined: November 18th, 2003, 6:49 am

April 14th, 2012, 9:55 am #8

The catalouge say not to be used on 2V heads, so maybe they are designed for a closed chamber?

""ya gotta wonder if it's gonna seal?""

hahaha, They seal, trust me.
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Joined: January 26th, 2011, 10:15 pm

April 14th, 2012, 12:48 pm #9

Dion, What catalouge are you refering to and which one says not to be used on 2V heads?



Jim
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Joined: November 18th, 2003, 6:49 am

April 14th, 2012, 11:34 pm #10

I read it on the Felpro or Fed Mogul site a while ago, but can't find it now.
But different sites also say not to suit 2 barrel heads. see below.
But other run them with 2V heads so i just don't know. I do run them with AFD 2V heads, but they are closed chamber obviously.

[url=http://www.oreillyauto.com%7cwww.checkerauto.com/site/c/detail/FEL1/1013.oap?ck=Search_N0581_FEL_-1_-1&mc=FEL&mn=Fel-Pro&pt=N0581&ppt=C0225]http://www.oreillyauto.com%7cwww.checkerauto.com/site/c/detail/FEL1/1013.oap?ck=Search_N0581_FEL_-1_-1&mc=FEL&mn=Fel-Pro&pt=N0581&ppt=C0225[/url]
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