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Intake Manifold
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64tubtoy View Drop Down
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    Posted: Jan/15/2014 at 2:18pm
I have a 1968 290/4bbl. motor and would like to know what Aluminum
Intake will work on this engine from idle to 5500 rpms??

Thanks, Wayne
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Originally posted by 64tubtoy 64tubtoy wrote:

I have a 1968 290/4bbl. motor and would like to know what Aluminum
Intake will work on this engine from idle to 5500 rpms??

Thanks, Wayne
A stock cast iron 68-9 343/390 intake is a good upgrade.
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The Edelbrock Performer is good from idle to 5500 rpm.

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Originally posted by Sonic Silver Sonic Silver wrote:

Originally posted by 64tubtoy 64tubtoy wrote:

I have a 1968 290/4bbl. motor and would like to know what Aluminum
Intake will work on this engine from idle to 5500 rpms??

Thanks, Wayne
A stock cast iron 68-9 343/390 intake is a good upgrade.
 _________________________________________________________________________
 
Only the 68/69 390 Manifold is the better upgrade. part #3191736 F.
 
The 390 manifold is different than the 290/343 manifold. The 390 is the same design as the good, newer 401 manifold, and is taller (almost a high rise), has larger runners than the small motor manifolds. Also. The internal ribs on the 290-343 go from side to side, and on the 390 the ribs run front to rear. Its all about airflow, and the 390 flows a lot better due to a couple of different engineering improvements.
 
The 67/69 290/343 manifolds are the same. part # for 290/343 #3186925
 
JDK
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Originally posted by jackdk jackdk wrote:

Originally posted by Sonic Silver Sonic Silver wrote:

Originally posted by 64tubtoy 64tubtoy wrote:

I have a 1968 290/4bbl. motor and would like to know what Aluminum
Intake will work on this engine from idle to 5500 rpms??

Thanks, Wayne
A stock cast iron 68-9 343/390 intake is a good upgrade.

 _________________________________________________________________________

 

Only the 68/69 390 Manifold is the better upgrade. part #3191736 F.

 

The 390 manifold is different than the 290/343 manifold. The 390 is the same design as the good, newer 401 manifold, and is taller (almost a high rise), has larger runners than the small motor manifolds. Also. The internal ribs on the 290-343 go from side to side, and on the 390 the ribs run front to rear. Its all about airflow, and the 390 flows a lot better due to a couple of different engineering improvements.

 

The 67/69 290/343 manifolds are the same. part # for 290/343 #3186925

 

JDK
Sorry, I have a 70, and I know that the 360 and 390 are the same intake. I mistakenly thought that the 343 and 390 were in 68 and 69. Now that you set me straight, I remember seeing an article about picking up 12 horsepower on a 343 by installing the 390 intake. Thanks for the clarification.
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[
 _________________________________________________________________________

 

Only the 68/69 390 Manifold is the better upgrade. part #3191736 F.

 

The 390 manifold is different than the 290/343 manifold. The 390 is the same design as the good, newer 401 manifold, and is taller (almost a high rise), has larger runners than the small motor manifolds. Also. The internal ribs on the 290-343 go from side to side, and on the 390 the ribs run front to rear. Its all about airflow, and the 390 flows a lot better due to a couple of different engineering improvements.

 

The 67/69 290/343 manifolds are the same. part # for 290/343 #3186925

 

JDK
[/QUOTE] Sorry, I have a 70, and I know that the 360 and 390 are the same intake. I mistakenly thought that the 343 and 390 were in 68 and 69. Now that you set me straight, I remember seeing an article about picking up 12 horsepower on a 343 by installing the 390 intake. Thanks for the clarification.[/QUOTE]
 ___________________________________________________________________________
 
I have owned Javelins and AMX's since 1969, and I just found this out a few weeks ago! LOL. Learn something new all the time. I always knew that the 343/390 heads are the same with the same part #, and took it for granted that the manifolds where as well for the 343/390.
 
I have two 4 barrel intakes I listed of Craigslist. Someone wanted the part numbers. When I came up with two different numbers for the early 290/343/390 manifolds, I did some digging. I was VERY surprised, and even more so when I found out that a 290 and a 343 dyno'd 12 more HP with the 390 manifold.
 
So now, I all of a sudden have a stock intake that may be worth a little bit more cash!
 
Learn something new everyday with these AMC's! LOL
 
68/69 390 INTAKE ANYONE???
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Originally posted by jackdk jackdk wrote:

The Edelbrock Performer is good from idle to 5500 rpm.

 
Yes, but the Performer is only made for 70-up (304-401) V8's
 
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I don't see where there's any real difference what intake you run. It's a 290 that's only going to a max of 5000 RPM. 12 horsepower? You can wax the car and gain 12 horsepower. Can you even feel 12 horsepower? I personally would run one of the smaller tapered intake runner intakes like the Edelbrock 2131, SP-2P, or Holley Street Dominator, and pick up a little oomph on the lower end. Maybe even get a little better mileage to boot. That little 290 isn't going to be helped by a big breather intake.
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Originally posted by typhooner typhooner wrote:

I don't see where there's any real difference what intake you run. It's a 290 that's only going to a max of 5000 RPM. 12 horsepower? You can wax the car and gain 12 horsepower. Can you even feel 12 horsepower? I personally would run one of the smaller tapered intake runner intakes like the Edelbrock 2131, SP-2P, or Holley Street Dominator, and pick up a little oomph on the lower end. Maybe even get a little better mileage to boot. That little 290 isn't going to be helped by a big breather intake.
First of all I understood that the poster wanted 5500 rpm max, instead of 5000. Secondly, is the 2131 Performer a smaller tapered runner intake?

     I started to mention the SP2P and The Holley Z Street Dominator, but I didn't know how easy they were to find, plus I wasn't sure if he wanted to slot them to fit. Maybe they made a version for 67-69? One other possibility would be the Offenhauser Dual Port, which was made for pre and post 70 engines.
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Originally posted by Sonic Silver Sonic Silver wrote:

Originally posted by typhooner typhooner wrote:

I don't see where there's any real difference what intake you run. It's a 290 that's only going to a max of 5000 RPM. 12 horsepower? You can wax the car and gain 12 horsepower. Can you even feel 12 horsepower? I personally would run one of the smaller tapered intake runner intakes like the Edelbrock 2131, SP-2P, or Holley Street Dominator, and pick up a little oomph on the lower end. Maybe even get a little better mileage to boot. That little 290 isn't going to be helped by a big breather intake.
 
First of all I understood that the poster wanted 5500 rpm max, instead of 5000. Secondly, is the 2131 Performer a smaller tapered runner intake?

     I started to mention the SP2P and The Holley Z Street Dominator, but I didn't know how easy they were to find, plus I wasn't sure if he wanted to slot them to fit. Maybe they made a version for 67-69? 
 
Nope, the SP2P (like the Performer #2131) was only produced for 70-up engines.   
Former Owner of:
The Craig Breedlove "AERO AMX"

Still Owner:
SS/AMX #9 replica (THE BIG MENACE)
70 AMX 416, EFI, Nash 5 speed   
70 Javelin 401, 727 (Wife's car)
72 Gremlin Autocross Project.
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