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.

Thanks
:cheers:

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

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.

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.

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. :bang:

Ohhh, you are not alone :G-Dub:

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?:headspin:

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

:popcorn2:

Sweet! Goals are so stressful, though . . .

Sorry but your info is incorrect. Although puddling would be reduced with EFI, it can still occur.
People use single planes for EFI because they're easier to machine, all the runners are the same height.
Right from Keith Wilson of Wilson manifolds "if a dual plane is the right intake for a carbed application, then it would be for an EFI application as well."
Case in point, I had a single plane on my EFI'd small block Olds. I went to an EFI'd dual plane, the dual plane was head and shoulders above the single plane. It was the right intake for my application, EFI'd or carbed, plain and simple.

Here's an interesting thread I came across a while ago. Obviously you are running the Holley system rather than FAST, but the concept is the same.

http://www.cpgnation.com/forum/threa...e-plane.25871/

Vacuum is a factor as well. Modern engines tend to have less overlap to make the same power.