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.

 

[dodgeboy440]

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?

Yes ….

Engine Masters ! Good & Talented Automotive
Enthusiast Bunch Who were Willing to Devote
Their Time & Resources To The Horsepower Wars …

Great Series on Mechanical Engineering &
Experience…..

Have U Evey Contemplated The Time / Effort
& Financial Investment !?

What was the last study you read?

Why don’t U be the leader of the band &
Set one up !

You posed the testing parameters.

Let’s see some results…….

Can U start please with a Horsepower Per
Dollar comparison…..

Then calculate drive ability torque curve
Per cubic inch displacement in residential traffic simulation with utilization of blended EPA Approved fuel at 87 octane at 98.5 degrees ambient temperature at sea level .

Publish In the Automotive Society Of Engineering Next Issue . Then Compile A
Couch potato Comparison Based On Domestic VS Foreign Manufacturing.

Sounds like we’re off to a good start …..

I’ve got a fresh batch of popcorn waiting for the documentary to start ……

U Asked Remember.

Mopar2ya!

VaasaaRooommmmmmmmm……….

 

[451Mopar]

Anyone willing to fund / help fund a 512 Low deck vs. 512 tall deck comparison? pretty much only difference is rod length.
I pretty much have everything for a 440 based 512 stroker, and the crank and rods and a few other parts for a 400 based 512 stroker. Still need pistons and bearings.
The 440 version is planned to be very mild pump gas daily driver. 27cc dished pistons, the 440 source CNC ported stealth heads, 1.6:1 rocker arms, and likely a hydraulic roller cam of maybe 230 @ 0.050" duration. For the 400, 440 source has 24 cc dished pistons so a slight compression difference, but could swap the heads and cam from one engine to the other.
Would need some intakes that are about the same for a comparison, maybe the Edelbrock RPMs or the knock off of those?
Have a Holley street dominator and the Edelbrock XT for a 440, only standard port low deck intake I have is stock 4bbl, and a old Weiand small single plane, I think X-cellerator?
Also have different cylinder heads that could be interesting, like the small chamber Brodix b1-B/S heads (that would really bump the compression ratio), and then the Edelbrock Victor MW heads (intakes would be an issue with that one too.)
Also have many carbs, FiTech and Sniper EFI, but it would cost a ton to test all of those variations.