Why not just a regular throttle body?

Did you have a bigger cam and better heads? Im doing this on a 540 that will definately be intake/throttle body restricted. I made a adapter flange last night that will allow me to make pulls with big throttle body vs stock, did you tune for it?

you beat me to it ^^^^^^^^^^^^^^^^^^ Smitty what is the CFM rating on the peanut port 500 efi TB

To be different and try something unorthodox. I had been seriously contemplating the Edelbrock Pro-Flo XT manifold but they are pricey. We will be testing a conventional 4 barrel TB on same dominator intake, however my plan is to eventually be procharged so the single round TB makes for a clean hookup. The 102mm should flow right around 1500 cfm as well. They are also much cheaper and prevalent due to the hot LSx market. Also, will be interesting to see if the motor likes the large elbow which helps to add plenum volume as well. May also try a few spacers underneath to see effect of plenum volume changes. The large swept elbow might also make for nice straight airflow into the intake as well. Was cheap enough of a setup to try for they dyno for ships and giggles.

EFI engines like large plenum volumes and the 500efi intake is plenum challenged as well as runner lengths too long. The MPI intake has a large plenum but once again the runners kill it along with a small throttle body and sharp angles the airflow must navigate into the runners. A stock 502 MPI TB flows around 1100 CFM and the larger TPiS version flows about 1370 CFM I was told by them when they experimented with mine years ago.

Heck, I'd be interested to try an EFI tunnel ram setup too. I love a good science experiment.

When i punch in a stock 500 tb at (2) 2.25 bores into performane trends software it shows it at just under 1000cfm, when you calculate the oval tpis tb at 3.25x5.0 then convert to square inches then plug it into same software it shows 1700+cfm BUT when you punch in area of intake plenum opening even after adding weld to backside of where old flange meets plenum AFTER grinding it until you are literally starting to come into the weld its 2.9x 5.1 and that shows just under 1500cfm BUT software is calculating it as a throttle body so its slightly low since its assuming a throttle shaft.

The tpis tb area is almost a dead match for a 105 mm round tb, fwiw. I finished building a adapter to adapt a stock tb or AZSM tb to new flange on plenum to see hp difference between the 3 today also, sorta crude since it just has to work for a few pulls on dyno, mounted with just a couple 10/24 countersunk screws, mark might need to grind it a little more to line up the AZSM tb when he does his dyno testing since i didnt have a AZSM tb to match it up with. I also welded the tpis flange to plenum today, a tiny bit of match up work and plenum is done!

yes its a 540 with 360 pro 1 heads and bigger cam , it was tunned before by brad smith after by ben bowman .

Smitty, I have the intake, TB, fuel rails, injectors sitting here not being used

I have a regular 2200 cfm dominator throttle body I will be running on the open plenum intake, Ron is buying a 90 degree elbow and single tb that I am going to test just to see if there is a difference.

Im surprised since I have previously dyno tested stock 502 mpi twin 60 mm vs my twin 65 mm vs the tpis thats 68 mm and saw progressive gains as went up in size, the dyno program shows a 17 ftlb tq gain and 30 hp gain from stock 500 to the tpis, fwiw, Smitty