What would you spend for......

[heyoldguy]

I personally did the FBBO dyno test with the log manifolds and the HP ones. Gained 2 lb-ft of torque at 2,700 rpm from 403 to 405 and 4 HP from 272 to 276 @ 4,300 rpm.

 

[twostick]

I personally did the FBBO dyno test with the log manifolds and the HP ones. Gained 2 lb-ft of torque at 2,700 rpm from 403 to 405 and 4 HP from 272 to 276 @ 4,300 rpm.

So basically zero noticeable improvement.

Kevin

 

[70bigblockdodge]

I personally did the FBBO dyno test with the log manifolds and the HP ones. Gained 2 lb-ft of torque at 2,700 rpm from 403 to 405 and 4 HP from 272 to 276 @ 4,300 rpm.

Sorry for the wrong numbers glad you piped up the record straight.

 

[Fratzog]

So basically zero noticeable improvement.

Kevin

They would make sense as part of a modest upgrade package for the street i.e. better pistons, rockers, cleaned up heads, intake and exhaust manifolds, 2.5" exhaust with cross over. All in you might gain 10-15% better output over stock. Just as a single add on item hardly worth it. But as mentioned they look cool....

 

[Turboomni]

What do these things look like??

 

[polara66hardtop]

383-440 HP C body manifold

 

[Turboomni]

383-440 HP C body manifoldView attachment 84079 View attachment 84079 View attachment 84080

Are they much different from what I have on my 69 440 when viewed from above?

 

[300rag]

Are they much different from what I have on my 69 440 when viewed from above?View attachment 84083

Those look like HP to me.

 

[Turboomni]

Really? How can I prove it if true??

 

[Turboomni]

Well then I will ask what stock manifolds look like then?

 

[bluefury361]

Really? How can I prove it if true??

A 7 digit casting number should be visible on the side......

 

[Turboomni]

So what numbers would confirm that? Or any numbers would in that position on the manifold??

 

[300rag]

Well then I will ask what stock manifolds look like then?

Maybe it's the angle of the picture, but yours looks like it has the arc up from #1. This is the regular log - fairly level across the top.

 

[Turboomni]

Here is a pic from the other side. I don't know if it will confirm anything. Looking at how high the manifolds rise on the valve covers ,,maybe they are . Never occurred to me. From this pic it looks like the manifold could really cook the oil inside the valve cover.

 

[300rag]

Here is a pic from the other side. I don't know if it will confirm anything

View attachment 84089

Notice how your manifold come up about midway on the valve covers? That's a giveaway. The regular logs run about even with the bottom of the covers.

 

[Turboomni]

I see,,,thankyou for the info.

 

[polara66hardtop]

look at the number in the picture. The HP is 2863409. The log is 2463107( 66-69 383-440 LP driver side)

 

[live4theking]

Are they much different from what I have on my 69 440 when viewed from above?View attachment 84083

The number that is by the dip stick in this picture. Write it down and look at the photo further back in the post. It will tell you what it is and what body styles it was intended to be used on.

 

[Turboomni]

Thanks for all the info. I will write down the numbers today.

 

[commando1]

Dual snorkel, Super Commando, hi-rise exhaust manifolds....
It should be fairly obvious.
318 big block Max Wedge Hemi.