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Old 01-29-2020, 11:54 PM   #1
verdirick
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Default Dual updraft intake manifold install

Has anyone out there run a dual updraft Zenith carburetor setup, Synchronizing etc. Appreciate any feeback.
Thanks
Rick Jensen
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Old 01-30-2020, 02:57 AM   #2
Synchro909
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Default Re: Dual updraft intake manifold install

I've never even seen such a setup. I very much doubt it could be fitted to a RHD car but because these cars are so forgiving, I wouldn't over think it. If the two carbs are individually good, I can't see synchronising as the be all and end all. In fact, I'd almost expect that at an idle, one is better than two.
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Old 01-30-2020, 07:25 AM   #3
Hoogah
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Default Re: Dual updraft intake manifold install

Verdirick, if you do Facebook, there’s a group called “Model A Modified”. One of the members recently posted a photo of twin Zenith B carbs hooked up via a Vortex intake manifold. His name is Eddie Pond. Could be a starting point? Good luck!
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Old 01-30-2020, 08:15 AM   #4
miff
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Default Re: Dual updraft intake manifold install

i have a Vortex set up with twin model B carbs on my speedster.The carb next to the firewall . The fuel adjustment value is preset. The cold start and chocking is done with the front carb.My Voltex came with the linkage set up with it . I have been running this setup since 2015.Hope this helps
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Old 01-30-2020, 08:41 AM   #5
alexiskai
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Default Re: Dual updraft intake manifold install

It's an older thread, so a lot of the pics don't work, but there's good info here:
https://www.fordbarn.com/forum/showthread.php?p=740845
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Old 01-30-2020, 10:04 AM   #6
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Default Re: Dual updraft intake manifold install

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I have the vortex with dual Zenith B carbs. In my experience synching was not a big deal, you just have to get the idle stops to match. I made no changes to the jet sizes.

My butt dyno says there is an increase in power. The only downside I found was it tends to be a bit cold blooded at startup so I need to get the engine warmed up before setting off, but it is great when up to temp.
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