Re: Head gasket question
[Re: Cab_Burge]
#2755204
03/23/20 08:33 PM
03/23/20 08:33 PM
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Joined: May 2016
Posts: 630 Ct
Wirenut
OP
mopar
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OP
mopar
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Do NOT use those gaskets on any block that the bore will be bigger than 4.320 They where designed to be used on the 38 and 426 W blocks, not the 400 and 440 blocks Look at the standard Fel Pro # 8519 or a better race gasket from Cometic, SCE or one of the other race gasket companies that offer the bigger bore sizes When Mopar started using the 440 blocks in 1973 in the trucks and motorhome chassis they change head casting and blocks with those holes to allow water to circulate around the exhaust ports and valves for better cooling The early 1009 gaskets didn't come with them either so you have a late set See......that’s why I ask questions. This thing ran 2 seasons that way. Yes the bore is 4.373 and these gaskets hole look two small . cab throw me a part number for a decent gasket if you know off hand. This is a budget bracket motor runs on methanol if that matters . As always thanks very much. G
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Re: Head gasket question
[Re: Cab_Burge]
#2755553
03/24/20 07:09 PM
03/24/20 07:09 PM
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Joined: May 2016
Posts: 630 Ct
Wirenut
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on a budget? try the fel-pro 8519. I've used a bunch of them on pump gas street motors with aluminum heads and less than 10.8 to 1 compression ratio with good results I”ll look at it thanks to both of you . Think it’s an ok piece for na 12-1?
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Re: Head gasket question
[Re: Wirenut]
#2755572
03/24/20 08:14 PM
03/24/20 08:14 PM
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Joined: Feb 2005
Posts: 105 Baltimore, MD
MadMax58
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8519 is not a good # on the fel pro site.
When Fel pro specifies bore size are they talking gasket bore or cylinders bore?
How much larger do you want the gasket bore vs the cylinder bore? G The head gasket is Felpro 8519 PT-1
Last edited by MadMax58; 03/24/20 08:15 PM.
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Re: Head gasket question
[Re: MadMax58]
#2755577
03/24/20 08:28 PM
03/24/20 08:28 PM
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Joined: May 2016
Posts: 630 Ct
Wirenut
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mopar
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OP
mopar
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Posts: 630
Ct
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8519 is not a good # on the fel pro site.
When Fel pro specifies bore size are they talking gasket bore or cylinders bore?
How much larger do you want the gasket bore vs the cylinder bore? G The head gasket is Felpro 8519 PT-1 Thanks got it
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Re: Head gasket question
[Re: Cab_Burge]
#2755680
03/25/20 07:39 AM
03/25/20 07:39 AM
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Joined: May 2016
Posts: 630 Ct
Wirenut
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OP
mopar
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I don't think I would use that gasket in your motor, to much of a chance of detonation above 12.0 to 1 compression ratio which could take the gasket out between the cylinders and ruin the block and head Been there and done that once, a long time ago Look at SCE and some others for a gasket designed for that compression ratio with the correct bore size Thanks Cab will do. Gary
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Re: Head gasket question
[Re: Wirenut]
#2755682
03/25/20 07:49 AM
03/25/20 07:49 AM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
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I've safely used a fel-pro 1039 at 12.5:1. main thing is keeping the fire ring away from the cylinder bore.
I've changed the number to 1039. 1059 was wrong.
Last edited by lewtot184; 03/25/20 09:33 AM.
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Re: Head gasket question
[Re: lewtot184]
#2755686
03/25/20 08:21 AM
03/25/20 08:21 AM
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Joined: May 2016
Posts: 630 Ct
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I've safely used a fel-pro 1059 at 12.5:1. main thing is keeping the fire ring away from the cylinder bore. Thanks L is there a rule of thumb for how far away ?
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Re: Head gasket question
[Re: lewtot184]
#2755693
03/25/20 08:51 AM
03/25/20 08:51 AM
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Joined: May 2016
Posts: 630 Ct
Wirenut
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I've safely used a fel-pro 1059 at 12.5:1. main thing is keeping the fire ring away from the cylinder bore. I’m guessing you meant 17059. Looks like it would be fine with my 4.373 bore. Thanks for all of the help G
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Re: Head gasket question
[Re: Wirenut]
#2755700
03/25/20 09:28 AM
03/25/20 09:28 AM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
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I've safely used a fel-pro 1059 at 12.5:1. main thing is keeping the fire ring away from the cylinder bore. Thanks L is there a rule of thumb for how far away ? i had to get my fel-pro catalog out to check the number. the number is 1039 not 1059, my mistake. this gasket was an easy/ reliable choice for a big bore and alum heads. rule of thumb on distance of fire ring from bore? I never came up with one but I know from experience the 1009 is a no-no. the 1039 has a 4.590" bore, per the catalog and the fire ring is comfortably distanced from the bore on a 400 or 440 block. I used the 1039 on a 4.375 bore 470.
Last edited by lewtot184; 03/25/20 09:32 AM.
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Re: Head gasket question
[Re: lewtot184]
#2755717
03/25/20 09:56 AM
03/25/20 09:56 AM
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Joined: May 2016
Posts: 630 Ct
Wirenut
OP
mopar
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OP
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Joined: May 2016
Posts: 630
Ct
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I've safely used a fel-pro 1059 at 12.5:1. main thing is keeping the fire ring away from the cylinder bore. Thanks L is there a rule of thumb for how far away ? i had to get my fel-pro catalog out to check the number. the number is 1039 not 1059, my mistake. this gasket was an easy/ reliable choice for a big bore and alum heads. rule of thumb on distance of fire ring from bore? I never came up with one but I know from experience the 1009 is a no-no. the 1039 has a 4.590" bore, per the catalog and the fire ring is comfortably distanced from the bore on a 400 or 440 block. I used the 1039 on a 4.375 bore 470. 1039 looks like great gasket. My only concern is the additional.020 ish in thickness. How might this affect the pushrod length. Solid roller. Also may be worth mentioning thes are iron 440-1 heads. Thanks for all your insight. I think I’m leaning towards the 17059 . Same thickness as the 1009 previously used on this engine, but a larger bore . It seams guys have used them with the 12-1 ratio. G
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Re: Head gasket question
[Re: Wirenut]
#2755770
03/25/20 12:16 PM
03/25/20 12:16 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
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master
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I've safely used a fel-pro 1059 at 12.5:1. main thing is keeping the fire ring away from the cylinder bore. Thanks L is there a rule of thumb for how far away ? i had to get my fel-pro catalog out to check the number. the number is 1039 not 1059, my mistake. this gasket was an easy/ reliable choice for a big bore and alum heads. rule of thumb on distance of fire ring from bore? I never came up with one but I know from experience the 1009 is a no-no. the 1039 has a 4.590" bore, per the catalog and the fire ring is comfortably distanced from the bore on a 400 or 440 block. I used the 1039 on a 4.375 bore 470. 1039 looks like great gasket. My only concern is the additional.020 ish in thickness. How might this affect the pushrod length. Solid roller. Also may be worth mentioning thes are iron 440-1 heads. Thanks for all your insight. I think I’m leaning towards the 17059 . Same thickness as the 1009 previously used on this engine, but a larger bore . It seams guys have used them with the 12-1 ratio. G I've never used the 17059 so I can't honestly comment on it. the 1039 is the head gasket indy cylinder threw at us and it was a real problem solver. I was thinking the 1039 was .012" thicker than the 1009,...? I wouldn't buy push rods for .012", unless your on the ragged edge with push rod geometry. maybe your just going to have to gather some gaskets up and mock it up to see what's the best fit,....?
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