Edelbrock Pro-Flo 4 EFI

[AMRE2ME2]

Anyone using this EFI? Pros/cons? And how does it compare to the Holley Sniper.

[cc2Arider]

I'm using it for my build, but haven't run it yet...FMan has good info on his decision :)

Craig C

[Mike.Bray]

I haven't used it but have a lot of experience with EFI. I can tell you the Pro Flo is miles ahead of the Sniper. It's not even close.

[dalves]

I've been planning out an EFI build, so this is my understanding based on research not actual experience. Take it with an appropriate dose of salt :)

Holley Sniper:
+Least expensive option
+More vintage look since you don't have visible fuel rails, looks somewhat like a carb
+ Can do data logging and manual tuning in addition to the automatic tuning
- EFI mounted on the engine which means lots of vibration and potentially electromagnetic interference
- Lots of reported problems (may have gotten better with the Sniper 2)
- uses Throttle Body Injection (TBI), injects fuel in one central place instead of right at each cylinder, which is simpler but less precise

Pro Flo 4:
+ uses Multi Point Fuel Injection (MPFI), so separate injectors for each cylinder right near the intake valve: means more precise control
+ Consensus seems to be that it's a well-engineered and well-built product without major flaws -- "just works"
- No data logging available
- visible fuel rails means it doesn't have that vintage carb look

Holley Terminator X (and friends):
+ MPFI, so separate injectors for each cylinder right near the intake valve: means more precise control
+ Data logging
+ Lots of features and flexibility, e.g. can do traction control, adjust tune for different stages of acceleration in a drag race, etc. (Terminator X Max / Dominator has even more features)
- visible fuel rails means it doesn't have that vintage carb look
- Most expensive option

[Mike.Bray]

Anyone using this EFI? Pros/cons? And how does it compare to the Holley Sniper.

What engine are you planning?

[AMRE2ME2]

Haven’t completely decided yet but probably Blueprint 347. I’m at 8500’ in Colorado. So I think FI would be better than carb. Waiting to order the MK5.

[Mike.Bray]

Haven’t completely decided yet but probably Blueprint 347. I’m at 8500’ in Colorado. So I think FI would be better than carb. Waiting to order the MK5.

EFI is always better than a vintage carburetor for drivability and performance.

If I was doing a 347W I would probably build a multiport system myself.

https://www.summitracing.com/parts/hly-300-276

https://www.summitracing.com/parts/hly-112-588

https://www.summitracing.com/parts/hly-565-201bk

https://www.summitracing.com/parts/hly-550-936

Add some injectors and pretty much ready to go. You would have a top notch system.







Holley Terminator X

[narly1]

I used one on my 302 build. There is a video of it running elsewhere in this forum. It went pretty straightforward, my first engine build and I got it running so it can't be that bad.

There are some cable management and hose routing tricks that you can use to tidy up those aspects of the installation.

Earl

[Jrmotorsports55]

I have it and love it. I have a bunch of videos on the install and tuning. Port injection is so much better than the TB injection.

[MB750]

I have it and love it. I have a bunch of videos on the install and tuning. Port injection is so much better than the TB injection.

You've got a lot of videos on it. Could you please help me narrow it down to the ones where you're actively tuning the Pro-Flo? Thanks

[mburger]

I ran the Pro Flo 4 for about 26,000 miles on my Blueprint 347. It made 439hp and 420lbs at the flywheel. Somewhere I have the video on the dyno from Mike Forte.
It ran well and with a turkey pan, it disappears. Edelbrock support isn't the best, but there is a user forum that can be helpful. I really like the sequential injection and the Bluetooth connectivity using whatever device you like, IOS or Android based. It pays to get to know the system because you likely won't find a tuner that will work with it. Most shops are familiar with Holley.
My engine and car went through a ton of changes throughout my ownership so that's why the differences in how the engine looks.
I have a list of off the shelf parts that interchange with the Edelbrock stuff. There are some tips as well when first setting it up but the most important is following the install directions to a T. If the manual says run + and - to the battery, do that.


https://thefactoryfiveforum.com/attachment.php?attachmentid=153234&d=1631304786

https://thefactoryfiveforum.com/attachment.php?attachmentid=141261&d=1611430002

https://thefactoryfiveforum.com/attachment.php?attachmentid=208656&d=1736172169

[Jrmotorsports55]

You've got a lot of videos on it. Could you please help me narrow it down to the ones where you're actively tuning the Pro-Flo? Thanks

Start with these: https://youtu.be/TcWRJGWxUuQ?si=Twapt7Pcb_3kJHEU

https://youtu.be/IKGpPlTsafE?si=ChSYXi14c-9XMKTs

https://youtu.be/vuEHCYO5ux8?si=CqGvCLQGUKdGVGpz

[Fman]

Anyone using this EFI? Pros/cons? And how does it compare to the Holley Sniper.

I have 7k miles on my Pro Flo 4, installed in 2021 when I finished my car. Up to this point not much to complain about, it runs good and is very easy to set up. I never took my car for a professional tune just used the 500 mile learning mode and set up with the PF4 wizard. The only issue I have had is the 7" tablet screen that came with the PF4 took a crap on me so I picked up Amazon Kindle 9" for $50 on Amazon and it works fine. I also updated my software and my iPhone now has the PF4 app on it to run the diagnostic screen which is nice. I also am running a CDI box which came recommended from Gordon Levy, not required by Edelbrock but so far has been good with the PF4.

[Dave Tabor]

Can you run the throttlebody part reversed like some do running carburetors to get the throttle cable to have a nice, wide curve?

Thanks,
Dave
Gen III Coupe #17

[mburger]

Can you run the throttlebody part reversed like some do running carburetors to get the throttle cable to have a nice, wide curve?

Thanks,
Dave
Gen III Coupe #17

I used the solid mechanical throttle linkage which Edelbrock does not recommend. Caused no issues whatsoever for me.

[Jrmotorsports55]

I have mechanical linkage on mine as well, no issues.

[Dave Tabor]

Can you run the throttlebody part reversed?

[mburger]

Can you run the throttlebody part reversed?

Sorry, I don't know what you mean by reversed.

[Dave Tabor]

My fault for being vague - sorry - i mean flipped 180 degrees.

A few of us carburetor folks do this so that the throttle arm is on the passenger side of the car and the throttle cable makes a nice gentle arc.

Thanks,
Dave

[mburger]

If you mean turning it on its center vertical axis so the brake booster port is facing forward instead of to the rear, there's absolutely no reason why you couldn't do that. The throttle body is just an air box. Its only purpose in life is to control the amount of air flowing through it. Using the hardware throttle linkage I never did that.

[Dave Tabor]

If you mean turning it on its center vertical axis so the brake booster port is facing forward instead of to the rear, there's absolutely no reason why you couldn't do that. The throttle body is just an air box. Its only purpose in life is to control the amount of air flowing through it. Using the hardware throttle linkage I never did that.

Great - thank you - that is what I was after.

Dave
Gen III Coupe #17

[Valkster]

My son and I are using a ProFlo4 on our build, on an old-school 428FE engine. We have about 30 miles on it (go cart mode) and so far, we like it. Installation was easy. We have had to start the reteach over a few times because we had some exhaust leaks that were tricking the O2 sensor to run really rich, but that was not the fault of the EFI.

-Mark

[canuck1]

I have been running it since beginning of last summer. I had been living with tuning my old Mass-Flo-EFI system when I had to adapt to a number of engine upgrades. There isn't much in the way of support left anywhere for 2005 era Mass-Flo-EFI, so I splurged for PF4.

I'd run an earlier version (PF3?) before as well, but the tuning capability didn't match my camshaft requirements. PF4 is much more plug and play than the old system, but there are still elements of EFI tuning you need to understand and address to make sure it's 'learning' properly. I like it, especially that (once I was confident it was on the right base map and learning was correctly underway) I don't really think about it too much anymore. Very reliable and mostly all easily available components. UPDATE to earlier comment above, the latest version of Edelbrock's E-Tuner4 (included with PF4) DOES include a datalogging function. It doesn't allow you to make changes through the software, only view running parameters and sensor outputs etc.

Sean

[weendoggy]

I haven't used it but have a lot of experience with EFI. I can tell you the Pro Flo is miles ahead of the Sniper. It's not even close.

Two completely different delivery systems.