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Old 09-10-2020, 12:38 PM   #1
Blastfromthepast
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Default 1936 dual carbs/ triple carbs

Will a stock 1936 engine be able to run well with these two set ups?
Dual carbs/ triple carbs. Will the engine support that much gas without a problem?
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Old 09-10-2020, 02:17 PM   #2
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Default Re: 1936 dual carbs/ triple carbs

Depends on the other mods you make. If you are just wanting the look, you can install a 3x2 setup and put blocker plates under the two outside carbs. If you are interested in dyno data on bolt-on type of modifications on a semi-stock engine you should read JWLs book. He starts with stock type add-ons and then goes into more involved modifications.
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Old 09-10-2020, 02:33 PM   #3
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Default Re: 1936 dual carbs/ triple carbs

I found that dual carbs on a 239 c.i. Engine don’t slow the stock engine down much but three carbs will.
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Old 09-10-2020, 03:25 PM   #4
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Default Re: 1936 dual carbs/ triple carbs

Blast, the biggest problem with fitting multi-carbs to early, pump in head engines, is generator/ waterpumps clearance. The easiest twin manifold to fit is one that allows stock generator mounting
What I've done is, using the front post of a generator, a short idler using a V8 gene pulley one end [that I can mount stock fan on], and another pulley out back that runs a separate belt to an alternator mounted off of a head. This second belt tucks in behind the waterpump
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Old 09-10-2020, 03:35 PM   #5
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Default Re: 1936 dual carbs/ triple carbs

Years ago we used the 97 Stromberg cards on multi card intakes due to the limited space. To obtain a good idle and low speed operation, use a progressive linkage. Many like the appearance of the two and three carb setup, but if you are looking for performance, your best bet is a four barrel carb sized for the displacement. At our shop we have built several engines using that carb.
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Old 09-10-2020, 07:14 PM   #6
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Default Re: 1936 dual carbs/ triple carbs

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dont be fooled to much carb is worst than not enough but having said that check out your cfm and go from there .There are lots of alternates out there and one can be made to work duals generally but not always run in pairs where triples run in progressive [ helps on smaller displacement] as you run mainly on the center the choices are endless its what you want and someone here will know how to make it work keep in touch love to see how it works out
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Old 09-10-2020, 07:44 PM   #7
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Default Re: 1936 dual carbs/ triple carbs

Thanks everyone for sharing your comments.
I have a stock 1936 Flathead and liked the look of something different.
I also was interested in the 1936 super charger look but with a stocker
I don’t know if it’s worth the investment. The car runs fine with the single carb
Just don’t want to open a can of worms. Are dual carbs
Set ups progressive? I know tri powers can be progressive linkage.
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Old 09-11-2020, 02:41 AM   #8
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Default Re: 1936 dual carbs/ triple carbs

Quote:
Originally Posted by Blastfromthepast View Post
Are dual carbs
Set ups progressive? I know tri powers can be progressive linkage.
Dual set-ups pretty much open in unison, because the way MOST manifolds are plumbed, opening a 'lead' carburetor before the other will result in half of the cylinders being fed a greater volume of air/fuel than the cylinders fed by the 'lagging', still-closed carburetor. DD
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Old 09-11-2020, 09:18 AM   #9
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Default Re: 1936 dual carbs/ triple carbs

The worst thing you can do to an engine is: running it rich, the excessive fuel washes lubrication off the cylinder walls causing ring failure to seal and diluting the crankcase oil an AF meter should be used to determine the fuel AF during cruise.
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Old 09-11-2020, 11:12 AM   #10
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Default Re: 1936 dual carbs/ triple carbs

The best running dual carb set up for a flat-head is a wide spread Super type, however, the gen has to be moved to a side mount and a fan mount similar to the cut down '39 gen like I have on my 36
Of course all of the above is a waste of time and money if you don't change the cam, heads, ignition, and exhaust.
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Old 09-11-2020, 12:32 PM   #11
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Default Re: 1936 dual carbs/ triple carbs

The Offy, regular spaced (narrow) manifold, makes the most since. The forward carb is very close to center and you can run a progressive linkage to the rear carb. You can also run the generator in the stock position and if you can find/afford a pair of 81 Strombergs, it won't hurt your performance.

That and a pair of aluminum heads and you will have "the look".
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Old 09-11-2020, 12:46 PM   #12
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Default Re: 1936 dual carbs/ triple carbs

This is what I’m running on my stock ‘36 21 stud. I did have to back the jets down as it was running very rich. I can use either the stock generator or the gen/alternator that’s on it now. It’s nice and peppy and can run all day long at 65-70 with decent fuel consumption and moderate rpms (I don’t have a tach on it but it’s not screaming by any means). The rear tires are 700x16 and it has the stock 4.10 rear end gearing and ‘36 3 sp tranny. Intake is a polished Edelbrock slingshot and the carb linkage is all direct.
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Old 09-11-2020, 02:15 PM   #13
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Default Re: 1936 dual carbs/ triple carbs

I agree with those who say that you should always run straight linkage with dual carbs. If you insist on running progressive, there are a couple of ways to minimize the problems. The first is The Edelbrock "SlingShot" as shown above, as it has a fuel distribution pattern similar to a four barrel carburetor. The second is to run what I call a "biased" manifold where the front carb is mounted in just about the same position as the carburetor on a stock manifold. and is used as the primary. That way, you will at least have normal fuel distribution most of the time. Only when you kick in the secondary (rear) carb will the fuel distribution get funky. Also, the generator relocation problem goes away. Here's what I'm talking about :
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Old 09-12-2020, 01:04 AM   #14
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Default Re: 1936 dual carbs/ triple carbs

Tubman, that is the Offy "Regular Spaced" manifold.

I believe they still make them.
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Old 09-12-2020, 01:39 AM   #15
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Default Re: 1936 dual carbs/ triple carbs

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Originally Posted by frnkeore View Post
Tubman, that is the Offy "Regular Spaced" manifold.

I believe they still make them.
Yeah, I think that picture came from the Speedway website. I have seen the same configuration from other manufacturers as well.
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Old 09-12-2020, 02:04 AM   #16
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Default Re: 1936 dual carbs/ triple carbs

Quote:
Originally Posted by 50droptop View Post
This is what I’m running on my stock ‘36 21 stud. I did have to back the jets down as it was running very rich. I can use either the stock generator or the gen/alternator that’s on it now. It’s nice and peppy and can run all day long at 65-70 with decent fuel consumption and moderate rpms (I don’t have a tach on it but it’s not screaming by any means). The rear tires are 700x16 and it has the stock 4.10 rear end gearing and ‘36 3 sp tranny. Intake is a polished Edelbrock slingshot and the carb linkage is all direct.



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