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  #1  
Old 01-22-2017, 03:07 AM
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DBasher DBasher is offline
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Default Single or dual plane manifold?

I've got the newer Sniper set up and was wondering which intake style to run. I had always thought dual plane was more street friendly and the single was for power at higher rpm...I've recently started seeing these TB style injection units being installed with the single plane intakes and it got me thinking (dangerous)

Any thoughts on this?
It's a mild 302 and I've got an older performer or a Victor JR to choose from.

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Old 01-22-2017, 09:02 AM
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There's an episode of the show Engine Masters where they compare carb and TB injection on an LS. They started with a dual plane but couldn't get the injection to work with it due to air signal or something. They had to swap to a single plane and it worked fine. Not sure if it was only because it's an LS or what

That said, I ran TB injection with an air gap on my SBC for a few years without much of an issue. I think you'd be fine and like the longer runners for street driving but I'd keep an eye out for anything goofy going on
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Old 01-22-2017, 08:21 PM
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With a carb, the single plane isn't as efficient at low speed (street driving)due to a weak signal to the carb (low speed air not drawing fuel through the carb). With efi, fuel delivery is not dependant on a vacuum signal, so fuel will be consistent at low speed. With mpfi there isn't even any fuel in the intake runners so fuel puddling in the intake is non existent. The single plane works very well with efi.
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Old 01-23-2017, 07:06 PM
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I agree with the above, the single plane works well on the street with EFI. I'm running a TBI on top of a Victor Jr and have no complaints with the street performance.
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Old 01-23-2017, 08:13 PM
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Thanks all, looks like I'm cleaning up the Victor Jr. and going that route. I swear every time I go in the garage I either go backwards or it costs me money.
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Old 01-23-2017, 10:02 PM
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Ohhh, you are not alone
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Old 01-24-2017, 10:51 AM
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Because I'm old, I seem to recall the old Holley Pro-Jection setup needing a single-plane manifold. A world of problems seems to disappear after you give up carburetion . . .

Does this mean that you'll have a working hotrod soon?
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Old 01-24-2017, 05:19 PM
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Quote:
Originally Posted by rustomatic View Post
Does this mean that you'll have a working hotrod soon?
It means I'll be one hurdle closer to making Thunderhill in April.
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Old 01-24-2017, 07:08 PM
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Quote:
Originally Posted by DBasher View Post
It means I'll be one hurdle closer to making Thunderhill in April.
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Old 01-25-2017, 12:24 PM
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Sweet! Goals are so stressful, though . . .

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It means I'll be one hurdle closer to making Thunderhill in April.
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