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TA Intake Manifold 340-6
#3050880
06/16/22 07:57 AM
06/16/22 07:57 AM
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Joined: Jan 2006
Posts: 2,368
White Plains, NY
VCODE
OP
top fuel
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OP
top fuel
Joined: Jan 2006
Posts: 2,368
White Plains, NY
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Does anyone know why they list a different Part # in the Mopar parts Book for a 1970 340-4 and a 1970 340-6 intake gasket.
Is it the port size or just because it's an aluminum manifold ?
Bob
Mom & Dad let me buy a brand new 70 Challenger R/T 440 Six-Pack Super Trac Pack when I was 17
(Robert what is a 440 Six-Pack)
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Re: TA Intake Manifold 340-6
[Re: ph23vo]
#3050957
06/16/22 12:56 PM
06/16/22 12:56 PM
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Joined: Jan 2006
Posts: 2,368
White Plains, NY
VCODE
OP
top fuel
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OP
top fuel
Joined: Jan 2006
Posts: 2,368
White Plains, NY
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iirc one is composite and one metal... Ok, so I think the TA 340-6 gets composite because it's aluminum Thanks Bob
Mom & Dad let me buy a brand new 70 Challenger R/T 440 Six-Pack Super Trac Pack when I was 17
(Robert what is a 440 Six-Pack)
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Re: TA Intake Manifold 340-6
[Re: VCODE]
#3050995
06/16/22 02:27 PM
06/16/22 02:27 PM
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Joined: Jan 2010
Posts: 1,442
NW Chicago suburban area
Mopar Mitch
pro stock
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pro stock
Joined: Jan 2010
Posts: 1,442
NW Chicago suburban area
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Aluminum notoriously has flatness and porosity problems... fiber-faced always is the better choice to give allowance for flatness and seal porosity issues.
ALSO... most people are unaware of the core-shift in the ports of the six-pack manifolds. An embossed steel gasket may, depending on the core shift of the ports -- as cast and finished from the factory -- allow the raised embossing to fall inside an intake port, in particular at the valley area, but anywhere possible... and then have sealing vacuum problems at that area. I've witnessed this problem on several six-pack manifolds ... especially the factory original manifolds... but same can be present on the MOPAR-Edelbrock aftermarket castings.
So... best to use the fiber-faced gaskets... (example being the Fel-Pro MS 90109 gaskets (fiber faced... but with embossing)... or better yet... their PERFORMANCE RACE gaskets (and trim open the center exhaust cross-over ports if you desire).
I'm a former Fel-Pro engineer from their aftermarket division... I know the history very specifically on this subject.
Mopar Mitch
"Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers!
Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
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Re: TA Intake Manifold 340-6
[Re: Mopar Mitch]
#3051009
06/16/22 02:56 PM
06/16/22 02:56 PM
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Joined: Jan 2006
Posts: 2,368
White Plains, NY
VCODE
OP
top fuel
|
OP
top fuel
Joined: Jan 2006
Posts: 2,368
White Plains, NY
|
Aluminum notoriously has flatness and porosity problems... fiber-faced always is the better choice to give allowance for flatness and seal porosity issues.
ALSO... most people are unaware of the core-shift in the ports of the six-pack manifolds. An embossed steel gasket may, depending on the core shift of the ports -- as cast and finished from the factory -- allow the raised embossing to fall inside an intake port, in particular at the valley area, but anywhere possible... and then have sealing vacuum problems at that area. I've witnessed this problem on several six-pack manifolds ... especially the factory original manifolds... but same can be present on the MOPAR-Edelbrock aftermarket castings.
So... best to use the fiber-faced gaskets... (example being the Fel-Pro MS 90109 gaskets (fiber faced... but with embossing)... or better yet... their PERFORMANCE RACE gaskets (and trim open the center exhaust cross-over ports if you desire).
I'm a former Fel-Pro engineer from their aftermarket division... I know the history very specifically on this subject. Thank you very much for this info Bob
Mom & Dad let me buy a brand new 70 Challenger R/T 440 Six-Pack Super Trac Pack when I was 17
(Robert what is a 440 Six-Pack)
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Re: TA Intake Manifold 340-6
[Re: VCODE]
#3051023
06/16/22 04:07 PM
06/16/22 04:07 PM
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Joined: Jan 2003
Posts: 28,595
Shopping @ HoBo Fright
340SIX
Doc Flappergas's Evil Twin
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Doc Flappergas's Evil Twin
Joined: Jan 2003
Posts: 28,595
Shopping @ HoBo Fright
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Like the post says above hard to get much better, so I use the good Fel-Pro on the heads 1008 and intake these on the intake
Last edited by 340SIX; 06/16/22 04:09 PM.
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