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#21
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Weren't those based on the Stromberg carb?
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DragStarLeMans |
#22
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Well from this thread we know at least 2 of these were cast. I love the foundry stamp! I personally prefer to see rolling museum art to wall art. Hope that beauty ends up on a running PONTIAC ENGINE. Very cool.
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#23
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Here’s the 6 carb set up from Edelbrock for a Pontiac.
This shot it out of my 1971 catalog, so even then they where still offering that intake. It was made for Holley carbs. I am willing to wager that if you had one of these that they ran better on only 4 carbs by not even having the center carbs bolted up. All I can say is that since I am now 68 and have yet to see one of these in person Edelbrock must of sold very few of them!
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I do stuff for reasons. |
The Following User Says Thank You to 25stevem For This Useful Post: | ||
#24
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I have seen several Pontiac Man-A-Fre set ups. 4 carb installations.
Plenty of air capacity for a street car. Very cool looking and a low hood profile. Cool Pontiac Street Rod stuff. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#25
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Interesting article about Man-A-Fre direct-port-injection systems ....
https://www.motortrend.com/how-to/me...look-like-new/ .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
The Following User Says Thank You to Steve C. For This Useful Post: | ||
#26
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The Edelbrock manifold appears to be a cross ram design where each carb feeds ports on the opposite bank, while the Man-A-Fre has each carb feeding directly into the ports below it.
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The Following User Says Thank You to Stuart For This Useful Post: | ||
#27
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Did the motion mods to friends holly on 427 camaro. Also on the program the guy brings cars back from the junkyard. He did an OHC tempest. He put a man-a-fre intake on it. Didnt know that existed for the ohc.
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#28
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Thanks for the article. Good info and great pics. Wish there was a little more about how the system actually performed.
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#29
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"Good carburetion is fuelish hot air". "The most expensive carburetor is the wrong one given to you by your neighbor". If you truly believe that "one size fits all" try walking a mile in your spouse's shoes! Owner of The Carburetor Shop, LLC (of Missouri). Current caretaker of the remains of Stromberg Caburetor, and custodian of the existing Carter and Kingston carburetor drawings. |
The Following User Says Thank You to carbking For This Useful Post: | ||
#30
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never heard of or saw anything like this before, and at my age too.....
Just so cool |
#31
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I was reading a discussion over on the HAMB board about a fellow who casted a three carb manifold for a GMC 302ci six, and in it someone else posted a photo of what appears to be a Man-A-Fre manifold for a Pontiac OHC 6. https://www.jalopyjournal.com/forum/...1280973/page-2
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The Following User Says Thank You to Stuart For This Useful Post: | ||
#32
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I can see where this thing would be a bear to tune for the street.
The carb on the left front feeds cylinder #1 then 270 crankshaft degrees later #3 then 450 degrees later #1 again. The carb on the right front feeds #2 then 270 crankshaft degrees later #4 then 450 degrees later #2 again. The carb on the left rear feeds #5 then 90 crankshaft degrees later #7 then 630 degrees later #5 again, with both intake valves open at the same time for quite a while. The carb on the left rear feeds #6 then 450 crankshaft degrees later #8 then 270 degrees later #6 again. ... but, it really looks good!
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My Pontiac is a '57 GMC with its original 347" Pontiac V8 and dual-range Hydra-Matic. |
#33
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With a open plenum intake between the 4 carbs, it is no different than a typical
Dominator intake manifold. Many Individual Runner intake manifolds pull fuel from a carb bore and then "go to sleep" until the next time it needs to provide fuel to the cylinder. You would have to set it up like a IR intake/carb calibration and it would be more "drive-able" vs a true IR intake set-up. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#34
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There was a Man-A-Fre for an OHC-6 on ebay auction only a few weeks ago. I think it sold for decent money.
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#35
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Patent document
The 2896597 patent is attached for the curious. I see some of these were cast with the patent number 2766743 which is earlier work by different inventor. Looks like a similar set of inter-connections .
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#36
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So ARE there plenums running between the 4 carb pots?
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My Pontiac is a '57 GMC with its original 347" Pontiac V8 and dual-range Hydra-Matic. |
#37
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Manafree
Those are "log" manifolds and different than an IR setup.
Quote:
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#38
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Bill, Flat-bill IS CORRECT. IT IS a log manifold, not a IR manifold. And we are now discussing
a 6 carb Edelbrock manifold vs a 4 carb Man-A-Fre manifold. The Edelbrock intake has TWO Plenums, 3 Balance Runners, and 6 Carb Mounts. The 4 carb Man-A-Fre manifold has 4 carb mounts (with 8 throttle plates feeding a COMMON plenum). Somewhat like "a crushed flat" tunnel ram intake plenum. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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