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Old 03-29-2013, 09:23 PM   #1
Flathead man2
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Default 4bbl carb on flathead?

I heard even before I got on here there are people running 4bbl's on their flatheads. What would the advantage be in looks and get up and go? I'd like to run 3 94's but Im trying to figure out when I get the engine if I go that way how to get all three to work together, but I think I might go with a Holley 390 cfm 4bbl.
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Old 03-29-2013, 09:39 PM   #2
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Default Re: 4bbl carb on flathead?

Here's mine. Runs great.
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Old 03-29-2013, 09:55 PM   #3
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Default Re: 4bbl carb on flathead?

Dont use the 94s if you plan to use all three together . Use the 81s, you will be glad you did , or use a 390cfm 4 barrel.
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Old 03-29-2013, 09:58 PM   #4
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Default Re: 4bbl carb on flathead?

3 duces are awsome looking, but the synconising problem can be a bitch, and on top of that you have to deal with alighnment problems with the off set generator bracket, you may or may not have that problem
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Old 03-29-2013, 10:04 PM   #5
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Default Re: 4bbl carb on flathead?

4 barrel easier to tune i run a edelbrock
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Old 03-29-2013, 10:05 PM   #6
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Default Re: 4bbl carb on flathead?

ford 3 how are you
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Old 03-29-2013, 10:21 PM   #7
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Default Re: 4bbl carb on flathead?

still kicking, and you?
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Old 03-29-2013, 11:10 PM   #8
Ol' Ron
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Default Re: 4bbl carb on flathead?

The 4bl carb on a flathead is the most practical modification you can make. the engine runs on the primaries until you need more power and adds more as you need it. It also is very economical in operation and trouble free. I recommend the Edelbrock 500 cfm as it's more tunable than the 390.
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Old 03-29-2013, 11:16 PM   #9
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Default Re: 4bbl carb on flathead?

The engine I am currently building for my 40 coupe is going to be using:
Holley 0-90470 470 CFM Truck Avenger Carburetor
for the same reason as the one Ol' Ron states.
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Old 03-29-2013, 11:33 PM   #10
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Default Re: 4bbl carb on flathead?

I've been running a 390 cfm Holley on mine for 15 years. Mounted it backwards on an Offy manifold and used slightly modified original linkage. Electric fuel pump delivers approx. 6 lbs. No regulator needed. After original set up, no adjustments needed and no more vapor lock. Mine looks like 40dFord's. I was after a reliable driver and that's what I got!!
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Old 03-30-2013, 12:26 AM   #11
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Default Re: 4bbl carb on flathead?

have the edelbrock 500, need the edelbrock intake and then will install.
rich
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Old 03-30-2013, 12:36 AM   #12
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Default Re: 4bbl carb on flathead?

for 3 i will be in portland 3june then down to lake tahoe can i visit on way down
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Old 03-30-2013, 08:01 AM   #13
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Default Re: 4bbl carb on flathead?

Few things beat the look of 3 carbs on a flattie. If you decide to run a 4 bbl. be aware that the OFFY intake offsets the generator mount 7/8 in. to the driver's side. Gen. pulley and fan pulley will not be "on center" with the crank pulley.
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Old 03-30-2013, 08:46 AM   #14
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Default Re: 4bbl carb on flathead?

Quote:
Originally Posted by Ol' Ron View Post
The 4bl carb on a flathead is the most practical modification you can make. the engine runs on the primaries until you need more power and adds more as you need it. It also is very economical in operation and trouble free. I recommend the Edelbrock 500 cfm as it's more tunable than the 390.

I ran a 500 cfm Edelbrock on a 256 Merc Flatty and I loved the performance.
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Old 03-30-2013, 08:57 AM   #15
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Default Re: 4bbl carb on flathead?

I have a 390 cfm Holley on my 8BA in my 29 roadster pickup.It really works good.
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Old 03-30-2013, 09:35 AM   #16
Flathead man2
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Default Re: 4bbl carb on flathead?

Thank you guys for all the great hints, I'm gonna run a 4bbl. How would the 390 win over truck avenger or vise versa? would one have more benefit over the other, I know truck avenger dont flood out, and good for offroad but where do each carb benefit the flathead?
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Old 03-30-2013, 10:01 AM   #17
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Default Re: 4bbl carb on flathead?

Thanks Ford guys!
I'm copying this thread & filing in my Ford Build Binder.
Any recommends/ comments on use with 221s,239s,255s pre or post WW2?
(i'm Pre War -1941 Dutch\Oklahoma model:::Ford Guy)
Gene Tulsa Close to old Duce Heaven
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Old 03-30-2013, 11:42 AM   #18
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Default Re: 4bbl carb on flathead?

Quote:
Originally Posted by Ol' Ron View Post
The 4bl carb on a flathead is the most practical modification you can make. the engine runs on the primaries until you need more power and adds more as you need it. It also is very economical in operation and trouble free. I recommend the Edelbrock 500 cfm as it's more tunable than the 390.
Yes, the EDELBROCK 500 works very well on my 276.
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Old 03-30-2013, 01:18 PM   #19
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Default Re: 4bbl carb on flathead?

I run 2 of the Holley 4 bbl series 4000 "Teapots" on my 32 Tudor.
They are directly linked and run very well. The 2 X 4 manifold was cast
by Ken Austin in Oregon. I think I have the only one he ever made
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Old 03-30-2013, 02:00 PM   #20
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Default Re: 4bbl carb on flathead?

Go to the Holley web site and use their calculator. I believe you will find the 390 with vacuum secondaries is what flatheads need. The flathead racers in this area use a 390 and say anything else is over carburation
I use a 390 on an offey single plane. My 8BA is still pulling smooth and strong at 5K
I think a 97 flows about 75 CMF.
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