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#1 |
Senior Member
Join Date: May 2010
Posts: 2,871
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Interested in the Fordbrainers collective experience with 4 barrel flathead manifolds. I would be running it on a 59L 3&5/16" X 4", with a L-100 or 1007B cam in a '40 coupe. Are their any performance difference between any of the older, common 8BA type manifolds, like Edelbrock or Offy. I would prefer an older original Navarro, but they don't seem to be available, and I don't want to buy a new one.
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#2 |
Senior Member
Join Date: May 2010
Location: Michigan
Posts: 466
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Google hot rod flathead Ford intake smack down...the offy was the best if I remember correctly..
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#3 |
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Join Date: May 2010
Location: East Hartford, Ct
Posts: 5,898
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Can't say if the Offy is the best but that's what I am running.
Started with a 390 Holley and dumped it for a 500 CFM Edelbrock. (better tune ability) The only anomaly with the Offy is that the generator mount flange is offset 7/8" to the drivers side. And I didn't buy the manifold new.
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DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES |
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#4 | |
Senior Member
Join Date: May 2010
Location: East Shore of LAKE HOUSTON
Posts: 11,136
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![]() Quote:
http://www.hotrod.com/how-to/engine/...old-smackdown/ |
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#5 |
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Join Date: May 2010
Location: Chester Vt
Posts: 8,923
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Yes, the 500 Edelbrock is very tunable, and with a SBC dist gives good power and great
economy. Start with the #8 jet pack |
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#6 |
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Join Date: May 2010
Posts: 3,019
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Count me in on the Offy 4 brl intake........of course I really lean to the ancient Rochester 4 Barrel carb on top. Modern wise the 500 cfm AFB/Edelbrock carb kicks butt....OMHO. Charlie ny |
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#7 |
Senior Member
Join Date: Jul 2010
Posts: 2,593
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Ron,
Didn't Richard end up with the #11 setup? Ruscc, That manifold test is an eye opener. They didn't optimize timing for the individual setups, so there was performance left on the table. If you read John's book (JWL), he dyno'd a couple of 4 bbl manifolds and some dual 2bbl's, there is a quite a significant power difference (relatively) with ignition timing optimized for different setups. Its all in the book, if you ain't got it, do so. Martin. |
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#8 |
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Join Date: Oct 2012
Location: Eastcoast
Posts: 867
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Not to high jack the thread but I have a nos 500cfm Rochester 2 bbl from the late 70s. Would that be a good flathead carb?
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#9 |
Senior Member
Join Date: May 2010
Posts: 2,871
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Thank you all. I originally read the flathead manifold test in HRM, but forgot about it. Thank you for the reminder. I have John's book, so I will dig it out and check the tests.
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#10 |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,450
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It's probably a "Large-base" 2GC and you will probably have to stack adapters just to get it mounted. A better bet would be a "Small-base" 2GC from the late '50's early '60's. These will bolt right on to a Merc four bolt manifold, but the throttle bores are larger than the manifold. I have this set up, and I bored the Merc manifold out to match the 2GC. I had enough "meat" in the manifold. I hear you can't bore a Ford manifold out that far without hitting the exhaust chamber. Mount it backwards, and the linkage, fuel line, and automatic choke (yep, Merc's had them) will almost fall into place.
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#11 |
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Join Date: Feb 2012
Location: Las Vegas, NV
Posts: 1,260
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Edelbrock 500 & intake works great.
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#12 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,450
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Edmunds and Fenton also made 4 BBL manifolds (I have one of each). I am planning on running period carbs (4G and WCFB) on them. I heard somewhere that the Fenton was the best of the lot, but don't quote me on that. I had an Offenhauser with a 390 Holley on a 276' Merc in a '36 that worked just fine.
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#13 |
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Join Date: May 2010
Location: Ballston Spa, NY
Posts: 789
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My 35 coupe is a period correct hotrod which requires old school. I have a Fenton with a 4 jet Rochester.
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#14 |
Senior Member
Join Date: May 2010
Location: NJ
Posts: 6,277
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Curious, when was the first 4 bbl. intake offered? I would think around '55-ish since that was when i think the Carter and Stromberg 4 bbls. entered the market. Did they come out earlier with the Rocket 88's?
Seems to make a lot of sense and I've seem them look cool on some motors. One guy put an old Vette chrome louvered air cleaner on his. Hid the intake and about 1/2 of the engine, but it looked cool. |
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#15 |
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Join Date: May 2010
Location: Chester Vt
Posts: 8,923
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Yes, I guess I'm getting old and the brain isn't working well any more, so I'll refrain from making suggestions. One thing you should consider when using a 4bl on the flathead is at least an inch spacer under the carb. If your using the hat carb and have to use an adapter make it a 4 wholer amd batch the manifold to the adapter. This will improve low and mid range throttle response. Unfortunately, it's alittle much for a stock engine. Stick to the 2GC
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#16 |
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Join Date: May 2010
Posts: 3,019
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Tim,
To my ancient knowledge 4 barrel carbs were introduced in '52 adapting WW2 technology developed for aircraft. Hard to realize those monster radial engines being fed by a carb, the krauts of course utilized Bosch F I. My favorite 4 barrel based on ease of tuning and overall simplicity is the Rochester. I'll say the Stromberg and Carter were more sophisticated using metering such and such but I like the boat anchor technology of the Rochester. Gotta use an A/F meter to get these operating in a happy range......anyway I do. Charlie ny |
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#17 |
Member Emeritus
Join Date: May 2010
Location: Fitzgerald, Georgia
Posts: 2,204
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As already mentioned, my book contains the real facts about manifold performance. And, I too like the Rochester carb. I was able to buy one, nicely restored, from Richard(in Fl.) which was originally used on a Cadillac. My preference for the Rochester is not related to "best possible performance".
JWL |
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#18 |
Senior Member
Join Date: Jul 2010
Posts: 2,593
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Ron,
Never stop making suggestions please. I remember stuff arse about face a lot, an I'm only half your age. I've said it before, it's your book that started my flathead life many moons ago. Your knowledge and experience is beyond amazing, so don't stop. The first 4 bbl manifolds came out in 52, a couple of months after the carbs them selves became available. Martin. |
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#19 |
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Join Date: Jun 2010
Location: Detroit suburb, MI
Posts: 3,715
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"Curious, when was the first 4 bbl. intake offered? I would think around '55-ish since that was when i think the Carter and Stromberg 4 bbls. entered the market. Did they come out earlier with the Rocket 88's? "
Carter WCFB, Rochester 4G and Stromberg 4G four barrel carbs all came out in '52. The Stromberg was available on Buicks. The other in '52 was Cadillac. In '53 a lot of other makes had 4 barrels, including the first Holley teapot on the '53 Lincoln. Sal |
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#20 |
Senior Member
Join Date: Jun 2010
Location: Detroit suburb, MI
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Sorry, the Stromberg 4 barrel was a 4A (not 4G).
Sal |
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#21 |
Senior Member
Join Date: Dec 2011
Location: NW North Carolina
Posts: 461
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I have 2 Offenhauser 4barrel intakes. Depending on the carb you plan to use you may also need an adapter plate. Both the 390CFM 4160 Holley and the 500CMF 1403 Weber/Edelbrock require an adapter plate.
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#22 |
Senior Member
Join Date: May 2010
Location: MN
Posts: 7,063
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Here's a weiand for a 8ba that I acquired from a trade with a friend. Traded a stock intake for it.
4 barrel adapter is for a large 4 barrel and they did a little porting to match the intake to the adapter. Maybe a little to much porting? Guess it ran well. I have a few stock intakes, or a couple more then i'll ever use, so I was just thinking it'd be a wall hanger for now. Last edited by Tinker; 05-05-2016 at 08:44 PM. |
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#23 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,450
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So far we have :
Edelbrock Offenhauser (Speedway has it's own version of the Offenhauser, I think) Weiand Edmunds Fenton Navarro Did I miss any? |
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#24 | |
Senior Member
Join Date: May 2010
Location: Michigan
Posts: 466
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![]() Quote:
I've seen sharp and grancor. Also one with no name that the top bolted on, you could unbolt the top portion and bolt on a 2x2 top |
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#25 |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,450
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Wow! Grancor! Anyone else seen one? (Sharp doesn't surprise me; I've just never heard of one.)
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#26 |
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Martin. |
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#27 |
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Join Date: May 2010
Location: Powell, TN
Posts: 2,520
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Nobody has mentioned the tilt that 49-53 4b manifolds have on the carb mounting surface. I have been told not to worry but it sure looks like it would play havoc with the float settings.
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#28 |
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Join Date: Feb 2011
Posts: 794
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You were told right, why it's there, is to keep the carb level, so there won't be any "havoc" with the float settings.
Last edited by 34PKUP; 05-06-2016 at 08:43 AM. |
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#29 |
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Join Date: Jul 2010
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34pickup,
I believe he's referring to using a late type (with the carb tilt) manifold in an earlier car. When this is done, the carb will take on a tilted forward lean. As the early stuff was mounted very flat rather than the tail down engine angle of the later stuff. I always thought that doing this was bad, float level n stuff, and just looks wrong. However folk I respect more than most, Ol Ron being one of them stated that it's been done for years, works no problem, and to pay it no mind. That's good enough for me. If it were mine, I'd level the carb. But this is I'm assured a purely aesthetic thing. I asked originally as I wanted to use an 8CM inlet on my 42 pickup. And wanted to know if there's easily obtained wedge plates to level the carb, and that's the answer I got. Martin. |
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#30 |
Senior Member
Join Date: May 2010
Location: NorCal
Posts: 2,617
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This is one cast by Ken Austin in Oregon who has been making manifolds since the 50's
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#31 |
Senior Member
Join Date: May 2010
Location: Chester Vt
Posts: 8,923
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Now that's one of the coolest intakes I've ever seen on a flathead
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#32 |
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Join Date: May 2010
Location: NJ
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#33 |
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Join Date: May 2010
Location: NorCal
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Hi Tim
Yes, it's mine |
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