Edelbrock Pro Flo XT

[6872n73]

Has/Does anyone have any dyno results of Edelbrock Pro Flow ET EFI manifold vs a single plane manifold?

I see a few people have used them because of fitment or appearance but I have not seen any dyno comparisons.

Runner length has to have some sort of impact, but how much?

 

[j-c-c-62]

 

[Derwud]

No Dyno results, but drivability sure improved over a Standard 4BBL intake and Carb.

 

[Dennis H]

No Dyno results, but drivability sure improved over a Standard 4BBL intake and Carb.

Same here.

 

[Derwud]

Same here.

And I blame this guy for my Pro-Flo 4 obsession..

 

[RemCharger]

Engine masters tried to document/ dyno the difference between carb/ efi HP and concluded that the carb made more power due to the fuel cooling the port walls... it was enlightening , but not surprising. A well tuned efi should have way nicer driveability though

 

[j-c-c-62]

And I blame this guy for my Pro-Flo 4 obsession.

Your point here is not clear.
Care to elaborate?

 

[6872n73]

I agree drivability is going to better with the pro flo but some of that is EFI.
Dual plane or single plane - Carb vs tbi - the carb will have more max power every time, that's well documented.
I'm would like to see if anyone has done A to B comparison: ie; ran a pro flo or single plane and then installed the pro flo XT on the same base engine, heads, cam ect.
Edelbrock has a video on youtube with a lot of music and numbers with no specs and a wonky torque curve.

Engine Masters where are you?

 

[451Mopar]

I think Edelbrock had a comparison like 20 years ago that it might be 15-20 HP gain, but don't recall what the baseline induction was?
The original XT kit (like 20 years ago) was really expensive, like over $4,000 and came with a really basic non-learning, narrow-band O2 ECU so tuning was harder and limited.
They had two versions, I think one had 35 pound injectors and the other had slightly larger injectors, maybe 44 pound?
Needed a long Lokar throttle cable, a 90-degree type thermostat outlet, and custom intake tubes and filter. The hard part to find was the intake tube to throttle body adaptor, I think it was an odd size? Maybe 4-1/4"?
I changed out the original ECU with a FAST 2.0 ECU with the wideband O2 sensors. That made the total investment really expensive.
This is what is on the Convertible.

For the hardtop, I wanted EFI, high output alternator, A/C, P/S, and serpentine belt drive. I bought a complete Gen III Hemi with transmission for less than the Edelbrock XT EFI.