Single plane vs dual plane with TBI

[JWMcCrary]

Single plane manifolds have a higher RPM operating range than dual plane, so using a dual plane always made sense for rock crawling since "most" people are light on the throttle and want torque at low RPM, plus you want to line up with your camshaft. Was reading on Holley's forum that a lot of people have found that single plane manifolds work much better with the throttle body injection overall, such as idle, low end, wide open etc.

Curious what some of you think of that? Could a single plane work better on a rock crawler at low RPM with throttle body injection? Has anybody used both and have experience?

Main reason I'm asking is because I have both manifolds, been using the dual plane. Don't need any practice changing manifolds if this is not a swap that would make and difference for the better.

 

[ZOSO]

here is another for backing that single plane is better for TBI.

https://www.youtube.com/watch?v=2sQJPZYSoUI

 

[Broncobowsher]

here is another for backing that single plane is better for TBI.

https://www.youtube.com/watch?v=2sQJPZYSoUI

That's the only reference point I have as well.

 

[Lohman]

Don't know if this means anything but the Chevy 305 & 350's with tbi that I have worked on were single plane manifolds. These were stock engines with stock manifolds.

 

[Bart]

I heard, many years ago, that a single plane manifold will starve some cylinders at low rpms. Interesting about the stock GM running singles.

 

[bax]

Im looking for a 400 intake that is single plane. Something like a torquer but they dont make them any more. Im going to give this a try

 

[Seventee]

Im looking for a 400 intake that is single plane. Something like a torquer but they dont make them any more. Im going to give this a try

I've always heard that the old Edelbrock SP2P manifolds are good for that.

 

[JWMcCrary]

Im looking for a 400 intake that is single plane. Something like a torquer but they dont make them any more. Im going to give this a try

Holley Street Dominator, there is one on ebay.

 

[bax]

Holley Street Dominator, there is one on ebay.

Looked at that one. All the threads in the intake are stripped. Still looking. Thanks

 

[Lohman]

Edelbrock used to make a manifold called Streetmaster. It was a single plane with small runners. I had one on a 351 in my 75 Bronco. It had plenty of low end torque. I still have the manifold and might just use it with something like fi-tech.

 

[ZOSO]

There is also this one for comparison. Although it is with a carb and not a TBI.

https://www.youtube.com/watch?v=i2DvnoHWagk