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Best head gasket for iron block with aluminum heads #2754978
03/23/20 12:03 PM
03/23/20 12:03 PM
Joined: Jan 2003
Posts: 5,338
Abilene, Texas
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fastmark Offline OP
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fastmark  Offline OP
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Joined: Jan 2003
Posts: 5,338
Abilene, Texas
I need a .040 head gasket for an iron block 440 with stealth heads. Can’t go any thinner. What gives the best results? I’ve heard some talk the Cometics may leak some. What about a felpro blue or maybe the better felpro gasket out there. I have new heads and a fresh cut deck.

Re: Best head gasket for iron block with aluminum heads [Re: fastmark] #2754980
03/23/20 12:08 PM
03/23/20 12:08 PM
Joined: Jan 2003
Posts: 12,980
So. Burlington, Vt.
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fast68plymouth Offline
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fast68plymouth  Offline
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So. Burlington, Vt.
Up to around 500-550hp or so, I’m perfectly happy with the 8519’s.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Best head gasket for iron block with aluminum heads [Re: fast68plymouth] #2754997
03/23/20 12:41 PM
03/23/20 12:41 PM
Joined: Dec 2013
Posts: 2,977
Wichita
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GY3 Offline
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GY3  Offline
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Wichita
Cometics here and never an issue.

I've even pulled it apart and reused them once.


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.40 @ 130mph with a 200 shot of nitrous. 6.48 @ 105mph in the 1/8th. 1.37 60 ft.

Re: Best head gasket for iron block with aluminum heads [Re: GY3] #2755032
03/23/20 01:49 PM
03/23/20 01:49 PM
Joined: Jun 2008
Posts: 3,190
usa
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lewtot184 Offline
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lewtot184  Offline
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Posts: 3,190
usa
fel-pro 8519.

Re: Best head gasket for iron block with aluminum heads [Re: lewtot184] #2755049
03/23/20 02:36 PM
03/23/20 02:36 PM
Joined: Aug 2003
Posts: 34,973
Bend,OR USA
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Cab_Burge Offline
I Win
Cab_Burge  Offline
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Joined: Aug 2003
Posts: 34,973
Bend,OR USA
Originally Posted by lewtot184
fel-pro 8519.
iagree
I've used a bunch of them on many B and RB motors with a lot of different brand aluminum heads up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Best head gasket for iron block with aluminum heads [Re: Cab_Burge] #2755057
03/23/20 02:56 PM
03/23/20 02:56 PM
Joined: Jan 2005
Posts: 1,226
Keymar, MD
DusterKid Offline
pro stock
DusterKid  Offline
pro stock

Joined: Jan 2005
Posts: 1,226
Keymar, MD
My vote would be for Cometic. I always used the real thin .018-.020 steel shim gaskets. Had to go to thicker ones and tried felpro ones and had some leaks. Switched to Cometics on it and it's been fine every since.

Re: Best head gasket for iron block with aluminum heads [Re: DusterKid] #2755063
03/23/20 03:09 PM
03/23/20 03:09 PM
Joined: Feb 2005
Posts: 15,455
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

Joined: Feb 2005
Posts: 15,455
PA.
Be careful with the Stealth head and big block Edelbrock heads as the firering
Overhangs the chamber. This is why a lot of us started using the Felpro marine gasket which worked great. I’m in the shop and can’t check the number but it was something like 11059.


1970 Duster
Edelbrock headed 408
6.143@110.85 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: Best head gasket for iron block with aluminum heads [Re: pittsburghracer] #2755072
03/23/20 03:29 PM
03/23/20 03:29 PM
Joined: Jun 2003
Posts: 51,917
Romeo MI
MR_P_BODY Online content
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MR_P_BODY  Online Content
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Posts: 51,917
Romeo MI
I sure wished my net would work out in my shop but the distance and a metal building say... nope
wave

Re: Best head gasket for iron block with aluminum heads [Re: MR_P_BODY] #2755079
03/23/20 03:47 PM
03/23/20 03:47 PM
Joined: Feb 2005
Posts: 15,455
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

Joined: Feb 2005
Posts: 15,455
PA.
Originally Posted by MR_P_BODY
I sure wished my net would work out in my shop but the distance and a metal building say... nope
wave




What kind of a cell phone do you have? If it is “hot spot” capable you can run your laptop off of it. I do it sometimes but usually have Spotify on my cell phone playing music through my stereo.


1970 Duster
Edelbrock headed 408
6.143@110.85 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: Best head gasket for iron block with aluminum heads [Re: MR_P_BODY] #2755081
03/23/20 03:48 PM
03/23/20 03:48 PM
Joined: Jun 2008
Posts: 3,190
usa
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lewtot184 Offline
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lewtot184  Offline
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Posts: 3,190
usa
the fel-pro 1009 is the problem gasket. the 8519 fire ring doesn't hang into the bore.

Re: Best head gasket for iron block with aluminum heads [Re: pittsburghracer] #2755086
03/23/20 03:54 PM
03/23/20 03:54 PM
Joined: Jun 2003
Posts: 51,917
Romeo MI
MR_P_BODY Online content
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MR_P_BODY  Online Content
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Joined: Jun 2003
Posts: 51,917
Romeo MI
Originally Posted by pittsburghracer
Originally Posted by MR_P_BODY
I sure wished my net would work out in my shop but the distance and a metal building say... nope
wave




What kind of a cell phone do you have? If it is “hot spot” capable you can run your laptop off of it. I do it sometimes but usually have Spotify on my cell phone playing music through my stereo.


My phone barely works out there.. I have to be next to the only window in the shop
wave

Re: Best head gasket for iron block with aluminum heads [Re: pittsburghracer] #2755095
03/23/20 04:15 PM
03/23/20 04:15 PM
Joined: Jan 2003
Posts: 12,980
So. Burlington, Vt.
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fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
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Joined: Jan 2003
Posts: 12,980
So. Burlington, Vt.
The early Stealth heads indeed had some chamber overhang issues.

The ones I’ve seen in recent years have been fine with 8519’s.
But I always check it on any heads I’m installing.

I don’t ever use a 1009 on any 440 or 400 blocks.
Ive seen several examples of them getting torched when the fire ring slips inside the chamfer at the top of the bore.

The 8519 doesn’t have this problem.

The marine gasket should also be good.

Cometics will work fine as well, but on this type of mild street application, IMO..... they don’t work any “better”.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Best head gasket for iron block with aluminum heads [Re: MR_P_BODY] #2755098
03/23/20 04:27 PM
03/23/20 04:27 PM
Joined: Jan 2003
Posts: 3,110
Auburn WA
Dave_J Offline
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Dave_J  Offline
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Joined: Jan 2003
Posts: 3,110
Auburn WA
Originally Posted by MR_P_BODY
I sure wished my net would work out in my shop but the distance and a metal building say... nope
wave


Originally Posted by pittsburghracer
What kind of a cell phone do you have? If it is “hot spot” capable you can run your laptop off of it. I do it sometimes but usually have Spotify on my cell phone playing music through my stereo.


Originally Posted by MR_P_BODY
My phone barely works out there.. I have to be next to the only window in the shop
wave


Sounds like you need to run a Cat5e or Cat6 cable out and put a second wifi router out there. Then just use a ethernet cable from the house router to a RJ-45 jack on both ends of the cable. Done this 100's of times for ADSL customers when I was working.


Retired, US ARMY 1973-1994
ASE mechanic, Electrical 1994-1997
Retired GTE/VERIZON/FRONTIER 1997-2015


Posting cheap tech help (CRAP) here since Nov 97, 1000's of posts, some may be good.

03 Suzuki Burgman 650(Burger King) Scooter
65 Formula S Cuda
78 Little Red Express Truck
98 Buick Regal (wifes car)
Re: Best head gasket for iron block with aluminum heads [Re: Dave_J] #2755101
03/23/20 04:37 PM
03/23/20 04:37 PM
Joined: Jun 2003
Posts: 51,917
Romeo MI
MR_P_BODY Online content
Master
MR_P_BODY  Online Content
Master

Joined: Jun 2003
Posts: 51,917
Romeo MI
I didnt mean to disrupt Marks post... its not that much to just walk back into the house to
use the net
wave

Re: Best head gasket for iron block with aluminum heads [Re: MR_P_BODY] #2755129
03/23/20 05:31 PM
03/23/20 05:31 PM
Joined: Jan 2003
Posts: 20,704
Rio Linda, CA
John_Kunkel Online content
Too Many Posts
John_Kunkel  Online Content
Too Many Posts

Joined: Jan 2003
Posts: 20,704
Rio Linda, CA
Originally Posted by MR_P_BODY
I sure wished my net would work out in my shop but the distance and a metal building say... nope
wave


If your shop is on the same electric power supply as the house modem, try a power line ethernet adapter.

https://www.youtube.com/watch?v=ywQeJCa3jl8


I'm supposed to respect my elders, but its getting harder and harder for me to find one now.
Re: Best head gasket for iron block with aluminum heads [Re: John_Kunkel] #2755141
03/23/20 05:48 PM
03/23/20 05:48 PM
Joined: Jun 2003
Posts: 51,917
Romeo MI
MR_P_BODY Online content
Master
MR_P_BODY  Online Content
Master

Joined: Jun 2003
Posts: 51,917
Romeo MI
Thanks.. the wife will research it
wave

Re: Best head gasket for iron block with aluminum heads [Re: fastmark] #2755147
03/23/20 06:00 PM
03/23/20 06:00 PM
Joined: Feb 2003
Posts: 910
Massillon, Ohio
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cudatom Offline
super stock
cudatom  Offline
super stock
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Joined: Feb 2003
Posts: 910
Massillon, Ohio
Been using Mr Gasket MLS for 5 yrs on my 512 with no issues. I run Edelbrock heads and have 11.5 cr. If I remember right there are 3 different bore sizes and all are .040.


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