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09-21-2019, 07:34 PM | #1 |
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Unusual carburation on Flathead V8’s
Hey gang it might be fun to talk about and share pictures of unusual carburetor choices on Flathead Ford engines. I’m really talking about anything other than the normal 3 bolt 94 Holley/Fords and Stromberg 97’s.
I’ve looked on several occasions at some Italian “Vee” engine’s with their Weber and Del’Orto carbs and thought hmmmm??? Carbs like those ^^^ are often designed for 60 degree V6’s and V12’s which have narrow intake manifolding like our Fords. So I’m curious if any of you have strayed from the beaten path. I’ll bet there’s a few that have used a Rochester 2GC, another good one. What about Autolite 2100’s and 4100’s that came on small Ford V8’s in the 60’s. Let it rip fellas if you have anything to say about this. Very interested to hear what you’ve done or plan to do in the future. Thanks! |
09-21-2019, 07:39 PM | #2 |
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Re: Unusual carburation on Flathead V8’s
I've seen one barrel Marvels with a Stromberg/Holley type base. Someone told me they were replacements. Same CFM, just one large single throat vs. two if I recall correctly.
I also think there were some 3 bolt Strombergs that had "L" backdraft horn that were used on Studebaker's of some sort. I could be wrong on this. |
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09-21-2019, 07:46 PM | #3 |
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Re: Unusual carburation on Flathead V8’s
This is probably not what you wanted to see, but here are some pictures of my attempt to put a Quadrajet on a flathead. I figure if the would run on a 3.8 liter Buick, they could be made to work on a 3.9 liter flathead. I only had a couple of junk Quadrajets, and I couldn't get it to run worth a shit. I have a bunch of other stuff going on, so I abandoned the project.
I do plan to get back on it some day. |
09-21-2019, 07:48 PM | #4 |
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Re: Unusual carburation on Flathead V8’s
Probably should have used an adapter that had 4 holes in it, not the open one.
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09-21-2019, 07:54 PM | #5 |
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Re: Unusual carburation on Flathead V8’s
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09-21-2019, 07:56 PM | #6 |
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Re: Unusual carburation on Flathead V8’s
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09-21-2019, 08:05 PM | #7 |
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Re: Unusual carburation on Flathead V8’s
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The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
09-21-2019, 08:30 PM | #8 |
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Re: Unusual carburation on Flathead V8’s
Mike Davidson from Austrialia use to offer a dual or single quad set up. The base used tops from Offy OHV V8 manifolds.
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09-21-2019, 08:39 PM | #9 |
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Re: Unusual carburation on Flathead V8’s
I saw this one at a car show a few years ago. Looks like a quadrajet on it. I never heard it run but pretty sure he drove it to the show.
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09-21-2019, 09:07 PM | #10 |
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Re: Unusual carburation on Flathead V8’s
I can't see it very clearly, but I think that's a 4G.
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09-21-2019, 09:32 PM | #11 | |
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Re: Unusual carburation on Flathead V8’s
Quote:
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09-21-2019, 10:09 PM | #12 |
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Re: Unusual carburation on Flathead V8’s
JMO but a quadrajet on a flathead is just plain wrong.
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09-21-2019, 10:55 PM | #13 |
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Re: Unusual carburation on Flathead V8’s
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The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
09-22-2019, 12:41 AM | #14 |
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Re: Unusual carburation on Flathead V8’s
Can't be wrong if it runs right! A Q-jet from a 3.8 Buick etc. should be jetted right ,or at least close, and the small primary throttle bores are ideal. Those huge secondaries have an adjustable air valve above the throttle plates so no danger of over-carburetion. Just find or make a good flowing adapter and you're good to go with a little tuning (which you should do with any carb).
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09-22-2019, 12:43 AM | #15 |
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Re: Unusual carburation on Flathead V8’s
Not true, IMO.
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09-22-2019, 01:40 AM | #16 |
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Re: Unusual carburation on Flathead V8’s
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09-22-2019, 05:17 AM | #17 |
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Re: Unusual carburation on Flathead V8’s
Happy to be running a 4bbl. on my flathead, but even though it's a 4bbl. it is operated as 2bbl. carb. 99.9999% of the time, just as I suspect all the rest of the 4bbl. equipped flatheads are.
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09-22-2019, 05:36 AM | #18 |
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Re: Unusual carburation on Flathead V8’s
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09-22-2019, 08:11 AM | #19 |
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Re: Unusual carburation on Flathead V8’s
I think Tony Baron made a Weber intake for flatheads at one time
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09-22-2019, 11:35 AM | #20 |
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Re: Unusual carburation on Flathead V8’s
My fantasies are more toward exotic, than performance. I've been thinking about running four updrafts.
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09-22-2019, 12:40 PM | #21 |
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Re: Unusual carburation on Flathead V8’s
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09-22-2019, 12:43 PM | #22 | |
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Re: Unusual carburation on Flathead V8’s
Quote:
I don't think there is an adaptor for a spread bore four barrel carb to a small base four barrel manifold. That setup looks like the air slams into a wall. I'm sure it would cause turbulence. Sal |
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09-22-2019, 12:44 PM | #23 |
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Re: Unusual carburation on Flathead V8’s
Russ, or how about two Carter side drafts as used on a 188 Gray Marine....just say'n.
I think Interceptor Marine {Y-Block} used this set up too. m |
09-22-2019, 12:45 PM | #24 |
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Re: Unusual carburation on Flathead V8’s
One of the best setups, ever.
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09-22-2019, 03:01 PM | #25 |
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Re: Unusual carburation on Flathead V8’s
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09-22-2019, 04:01 PM | #26 |
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Re: Unusual carburation on Flathead V8’s
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But I'm lovin' the thought of I-Talian Testa-Rossa bits on your Ford. Just not lovin' that price tag.
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09-22-2019, 07:04 PM | #27 |
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Re: Unusual carburation on Flathead V8’s
The only good thing that came out of this whole thing is that when I was running the numbers on a couple of Quadrajets I had to get the proper kits, I found out one was from a 1979 390 HP 454 Corvette. I sold it on eBay for $400 (matching numbers Corvette guys). It was the best core I had; I was reduced to using a core from a very dirty '75 Oldsmobile; I don't know if it was my deficit in rebuilding it or just a bad core.
I am going to get back into this some day, but I think one of the posters above was right; the next time I dive into this I am going to make an adapter that hast four individual throttle bores instead of the open plenum I originally used. Last edited by tubman; 09-22-2019 at 07:17 PM. |
09-23-2019, 06:07 PM | #28 |
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Re: Unusual carburation on Flathead V8’s
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09-23-2019, 06:16 PM | #29 |
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09-23-2019, 06:54 PM | #30 |
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09-23-2019, 08:12 PM | #31 |
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09-23-2019, 08:52 PM | #32 |
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09-23-2019, 08:55 PM | #33 |
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09-25-2019, 01:14 AM | #34 |
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Re: Unusual carburation on Flathead V8’s
I'm using Edelbrocks new 500 CFM AVS2 4 barrel ,great throttle response and fuel economy.
Did need major tuning with AFR meter thought. Ugly and too modern , but under the hood of ´50 Conv and air cleaner I can live with it .... |
09-25-2019, 11:13 PM | #35 |
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Re: Unusual carburation on Flathead V8’s
Photos of unusual set ups on the Ford V8 engines the first one was on a V8 Coupe being raced.
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09-25-2019, 11:30 PM | #36 |
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Re: Unusual carburation on Flathead V8’s
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09-26-2019, 01:09 AM | #37 |
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Re: Unusual carburation on Flathead V8’s
I’ll try to figure out how to put pictures up. We have a Flathead we put a blower and Holley fuel injection on. Works great.
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09-26-2019, 12:16 PM | #38 |
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Re: Unusual carburation on Flathead V8’s
REALLY nice pictures, Ian!!! Awesome!
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09-26-2019, 01:30 PM | #39 |
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Re: Unusual carburation on Flathead V8’s
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09-26-2019, 01:36 PM | #40 |
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Re: Unusual carburation on Flathead V8’s
I would say, probably so.
My guess is was originally a '32 manifold, made to look like a later 2 barrel Probably shorten, too. I think it would have been higher than the hood, to show them off!! |
09-26-2019, 01:43 PM | #41 |
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Re: Unusual carburation on Flathead V8’s
2X2 "y" adapters are available,so I think it was just stretched
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09-26-2019, 08:23 PM | #42 |
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Re: Unusual carburation on Flathead V8’s
Probably cause some ruckus. But I always remember quada-jet = quadra-junk. Yikes... just a old saying. Probably not true.
4 barrels are a good "non-tradition" carb. Not, show cool. But, go cool. . |
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09-26-2019, 09:43 PM | #43 |
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Re: Unusual carburation on Flathead V8’s
Yes, I would have to say Quadrajets are not really Quadra-junk. They just don't look as pretty as a Holley. Actually have better driveability for the street in my opinion.
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09-26-2019, 10:50 PM | #44 |
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Re: Unusual carburation on Flathead V8’s
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09-26-2019, 11:24 PM | #45 |
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Re: Unusual carburation on Flathead V8’s
It is not a 32 manifold which has a single throat down draft carburettor and the generator on a 32 manifold has a single pole mount generator I would say it was a 34 manifold.
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09-27-2019, 12:56 AM | #46 |
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Re: Unusual carburation on Flathead V8’s
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09-27-2019, 01:14 AM | #47 |
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Re: Unusual carburation on Flathead V8’s
Regarding Q-jets, my best friend was a true GM lover but, had a Camaro with one on it. He rebuilt it, because it flooded, at least 3 times. He disliked Holley's, because that was what most performance Fords had on them.
I always encouraged him to use Holley's but, No Way! One day, when he was working on the Q-jet, I talked him into trying a Holley. I told him if he didn't like it, I would take it. WELL, I found him a spread bore Holley and after installing it, he thanked me over and over, for at least the next 10 years. That was in the early '80's. I'm sure they must have, finally fixed the problem but, the main thing I disliked about the Q-jets, is the lack of a smooth air flow, threw the secondary's, same with the AFB's. Frank |
12-28-2019, 09:43 AM | #48 |
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Re: Unusual carburation on Flathead V8’s
I've been running a 1958 Carter WCFB 4bbl on my 8ba for the last 75K miles. It sets on a Offy 4bbl intake. I put it and a MSD 8573 ready to run dizzy on the motor when I rebuilt it & have never had ANY problems.
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12-28-2019, 10:22 AM | #49 |
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Re: Unusual carburation on Flathead V8’s
Here’s one I have.
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12-28-2019, 11:00 AM | #50 |
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Re: Unusual carburation on Flathead V8’s
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12-28-2019, 06:52 PM | #51 |
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Re: Unusual carburation on Flathead V8’s
I just got this setup.
What kind of performance can I expect? |
12-28-2019, 06:53 PM | #52 |
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Re: Unusual carburation on Flathead V8’s
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The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
12-28-2019, 07:15 PM | #53 |
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Re: Unusual carburation on Flathead V8’s
I was thinking of running an updraft, but need to get mine running first with the stock stuff.
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12-28-2019, 07:47 PM | #54 |
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Re: Unusual carburation on Flathead V8’s
#52 Pete,
You will love that setup. I have the same on my '41 p'up. 6 years with no maint except when a fly ended up in the bowl and plugged one primary jet ( the boot surrounding the acc pump shaft had rotted away). The Rochester carb so easy to tune vs any Holley or Carter. Charlie ny |
12-28-2019, 08:07 PM | #55 | |
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Re: Unusual carburation on Flathead V8’s
Quote:
Charlie - You mean #52 should be RalphM....
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12-28-2019, 08:18 PM | #56 |
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Re: Unusual carburation on Flathead V8’s
Like Charlie says, you're gonna love that thing. I ran one on a little 265 Chevy (similar cubic inches) for several years and it was a sweetheart. The one I had came off of a Buick. DD |
12-28-2019, 10:05 PM | #57 |
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Re: Unusual carburation on Flathead V8’s
Thanks,
It looks pretty clean, but if I need to can I still get a kit for this one? Also I’d like to run this on a 59AB engine. |
12-28-2019, 10:45 PM | #58 |
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Re: Unusual carburation on Flathead V8’s
RalphM,
How much modification to replace the 9510 Teapot? What model Rochester? Would it work with the distributor found on the 53' Merc with a Merc-O-Matic? |
12-28-2019, 11:31 PM | #59 |
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Re: Unusual carburation on Flathead V8’s
I would think it would just be a matter of swapping the intakes on the 53, should have enough vacuum for the dist, but I’ve never tried it.
I’ve never used this setup before, but I’d like to give it a go. |
12-29-2019, 12:04 AM | #60 |
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Re: Unusual carburation on Flathead V8’s
I have one of those setups (small base 4GC on an aftermarket manifold). I haven't had a chance to use it yet, but it came with a plate that mounts under the carburetor with a bell crank linkage on it so that the movement of the throttle linkage is reversed. I have a couple of 2GC's running on a couple of engines and the throttle on those also pull the wrong way. On those, you just mount the carburetor backwards on the manifold and everything falls into place. It may be that simple on a 4 BBL, but it's something to be aware of.
BTW, the reason that I'm not using the 4BBL setup is because the 2 BBL versions on a bored out Merc manifold work so well. If I were to replace a stock 4 bolt Holley with anything, it would be a small base Rochester 2 BBL, not the little Ford carb. Last edited by tubman; 12-29-2019 at 10:16 AM. |
12-29-2019, 05:55 AM | #61 | |
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Re: Unusual carburation on Flathead V8’s
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12-29-2019, 08:37 AM | #62 |
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Re: Unusual carburation on Flathead V8’s
I tink the Weber is a direct bolt on to the flathead. The reason is Kenny Web ran one at Danbury and the rules stated that you could run any carb that bolted on the stock intake.
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12-29-2019, 01:46 PM | #63 |
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Re: Unusual carburation on Flathead V8’s
Rochester 2GV on a '50's Merc 4 bolt manifold. As tubman said,the carb mounts backward and the linkage lines up nicely. This carb is from a late '60's Chev.
As for any carb other than stock working with the late flathead distributor, that's going to be a no-go. The stock load-a-matic distributor used a combination of venturi and manifold vacuum sourced from unique drillings in the stock carb. Ported vac will not work properly and neither will full manifold vac. A distributor swap will be needed to make things right. Terry
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12-31-2019, 11:04 AM | #64 | |
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Re: Unusual carburation on Flathead V8’s
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12-31-2019, 11:32 AM | #65 |
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Re: Unusual carburation on Flathead V8’s
Just a side note. While a small base Rochester 2G will bolt directly on to a Mercury manifold, the throttle bores in the manifold are smaller than the carburetor (1 5/i6" vs. 1 7/16"). I bore the manifolds to 1 7/16" all the way down with a "Rota-Broach" using a special guide I made. As mentioned above, the throttle linkage and fuel line are positioned correctly if the carburetor is mounted backwards. Unfortunately, this puts the manual choke in the wrong position. However, the Mercury automatic choke mechanism is positioned exactly right for use with a 2G. I have done both the on-carb choke (2GC with an early manifold) and the divorced choke version (2GV on a later manifold) and both require only minor modifications to make them work.
And of course, all of this precludes using the original distributor. |
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