Edelbrock Pro Flo 4 EFI

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Mopar73340 said:
Been a while since I have visited here but wanted to let those who are following this thread know that I installed a Pro Flo 3 system on one of my vehicles last year and am working on the Pro Flo 4 system currently. Anyone contemplating the small block version BEWARE that the intake manifold does not fit in the area of the distributor and needs to be modified or plainly put a grinder needs to be used unless something has changed in the last month or two. How Edelbrock can screw this up is beyond me. Same issue with both kits a year apart.
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That's good info!

For a small block, I have worried that the intake + throttle body would be too tall and the air cleaner would have interference with the hood. Any experiences with that?

Do you have pictures of the problem area with the distributor and what needs to be done or what areas need to be ground off?

Thanks!
 
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I was running the RPM Airgap so I didn't notice any difference as far as the air cleaner and hood clearances. The manifold is slightly taller but the throttle body is a little shorter than a carb so the difference is minimal if any. Attached picture of interference with distributor installation.
 
Mopar73340 said:
View attachment 1715235612 I was running the RPM Airgap so I didn't notice any difference as far as the air cleaner and hood clearances. The manifold is slightly taller but the throttle body is a little shorter than a carb so the difference is minimal if any. Attached picture of interference with distributor installation.
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Wow! You'd think Edelbrock would get that right. I mean, they already make small block mopar intakes. Don't they follow the same pattern?
 
JoesEdge said:
Wow! You'd think Edelbrock would get that right. I mean, they already make small block mopar intakes. Don't they follow the same pattern?
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You would think so. When I called they claimed that I was the first with this problem. As you can see there is more than the required amount of "Meat" in this area. Why is the intake cast back that far? When I asked those questions again the answer was they had never heard of this problem. I sent them the same picture as I posted here. The real kicker is between the Pro Flo 3 and Pro Flo 4 now a year later there have been some mods to the intake mold in the front to the water temp ports but this problem persists.

It's not that big of a deal to grind off the excess material. I just want everyone who is interested in the small block kit to know they may have some additional work to do before assembly unless Edelbrock has changed something in the past few months.
 
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Mopar73340 said:
You would think so. When I called they claimed that I was the first with this problem. As you can see there is more than the required amount of "Meat" in this area. Why is the intake cast back that far? When I asked those questions again the answer was they had never heard of this problem. I sent them the same picture as I posted here. The real kicker is between the Pro Flo 3 and Pro Flo 4 now a year later there have been some mods to the intake mold in the front to the water temp ports but this problem persists.

It's not that big of a deal to grind off the excess material. I just want everyone who is interested in the small block kit to know they may have some additional work to do before assembly unless Edelbrock has changed something in the past few months.
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I know that the Pro Flo 3 and Pro Flo 4 have different computers, but what was your experience with the Pro Flo 3? Was it worth it? I'll be looking forward to your experience on the Pro Flo 4 once you have it running.
 
JoesEdge said:
I know that the Pro Flo 3 and Pro Flo 4 have different computers, but what was your experience with the Pro Flo 3? Was it worth it? I'll be looking forward to your experience on the Pro Flo 4 once you have it running.
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I like the Pro Flo 3 so far. It is really nice to be able to start the car and have it idle like a new car. You can set idle rpm target, spark curve and Idle timing targets, fuel targets, and several other parameters. Overall it runs good and also to be upfront I only have about 500 miles on it. I do have a minor issue with running at low RPM in 4th and 5th gears as it seems like it is not getting quite enough fuel. I'm still tweaking on it and it is still learning so hopefully I will get it ironed out.

I also believe that if the transmission was an automatic I wouldn't notice this issue and all would be good as the torque converter would not let the engine operate in the rpm range where I notice the issue. If I had to to it over again I would with the exception of waiting a year for two reasons unknown at the time, 1) Waiting for the possible improvements of the Pro Flo 4, and 2) The price reduction of the kit over the past year. Other than that I have no regrets.
 
Mopar73340 said:
You would think so. When I called they claimed that I was the first with this problem. As you can see there is more than the required amount of "Meat" in this area. Why is the intake cast back that far? When I asked those questions again the answer was they had never heard of this problem.
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Well, having just bought a SB ProFlo4 I had to check mine out after seeing your post! Turns out Edelbrock may actually have to concede that this really is an issue that they have with these units. While it may just be possible to install the distributor without grinding I’ll definitely be tidying up the rough radius that they supplied mine with! Good time for me to do this is probably when I modify above the ports to allow the rocker covers to sit correctly - from what I’ve read this is an issue with the Super Victor style manifold. I’ve posted some images below,
1 - ProFlo4 manifold out of the box,
2 - For those that wish to compare the relative height difference between their existing combo and the ProFlo4 this photo shows the vertical height measurement from the top of a cast rocker cover rail to the very top of the throttle body - 6.340” (apologies for the poor focus)
3 - RPM Airgap for comparison and just to show that Edelbrock do know how to get it right

23E6B3E5-1A06-4ECF-BF89-678E6A4CC54B.jpeg


AD605DBE-FC4F-4411-84DA-B867D7531884.jpeg


8A4DA8C6-4B55-4666-92AD-4821085E769E.jpeg
 
Greg Spooner said:
Well, having just bought a SB ProFlo4 I had to check mine out after seeing your post! Turns out Edelbrock may actually have to concede that this really is an issue that they have with these units. While it may just be possible to install the distributor without grinding I’ll definitely be tidying up the rough radius that they supplied mine with! Good time for me to do this is probably when I modify above the ports to allow the rocker covers to sit correctly - from what I’ve read this is an issue with the Super Victor style manifold. I’ve posted some images below,
1 - ProFlo4 manifold out of the box,
2 - For those that wish to compare the relative height difference between their existing combo and the ProFlo4 this photo shows the vertical height measurement from the top of a cast rocker cover rail to the very top of the throttle body - 6.340” (apologies for the poor focus)
3 - RPM Airgap for comparison and just to show that Edelbrock do know how to get it right

View attachment 1715236207

View attachment 1715236208

View attachment 1715236209
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I agree with the rough opening for the distributor as this should not be the issue as it seems to be. Edelbrock has been making manifolds for many years and I've used several in the past that fit correctly without looking like they were produced by kids. It appears as though your distributor will fit but just barely but I still can't believe the unit ships looking like it does in that area.

So how are you going to modify above the ports for the covers to fit correctly? I just shaved the covers on my "LA" engine to fit. I would be interested to see your solution.
 
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Mopar73340 said:
So how are you going to modify above the ports for the covers to fit correctly? I just shaved the covers on my "LA" engine to fit. I would be interested to see your solution.
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I’m still to have a good look at this, I’ll let you know, where and how far did you shave your covers?
 
Greg Spooner said:
I’m still to have a good look at this, I’ll let you know, where and how far did you shave your covers?
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I have the Aluminum MP covers on my "LA" engine. It took quite a bit of time to remove enough aluminum from them to clear the intake runners with stock heads. I just removed material at the intake runners. The other engine I installed the EFI system on has Magnum EQ heads and MP aluminum covers and they fit with no issues.
 
Mopar73340 said:
I have the Aluminum MP covers on my "LA" engine. It took quite a bit of time to remove enough aluminum from them to clear the intake runners with stock heads. I just removed material at the intake runners. The other engine I installed the EFI system on has Magnum EQ heads and MP aluminum covers and they fit with no issues.
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Magnum EQ heads for the win!!! That's what I have on my LA as well (the Mopar valve covers too). Good to know!
 
Dennis H said:
Need to source a Lokar throttle cable. Intake too high to modify existing.
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Also, it's unclear if we will be able to alter the initial timing to 18* or more while keeping the total limited to 34-36*; or if the motor even still wants that timing that worked well with the carb.

Should know more this weekend.
 
jbc426 said:
Also, it's unclear if we will be able to alter the initial timing to 18* or more while keeping the total limited to 34-36*; or if the motor even still wants that timing that worked well with the carb.

Should know more this weekend.
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You have a Magnum engine in yours right? With the Magnum EFI? You've been on the Friday Spring Fling and/or Fall Fling cruises to Malibu? I think I have seen your car, but I might be mistaken.
 
jbc426 said:
Also, it's unclear if we will be able to alter the initial timing to 18* or more while keeping the total limited to 34-36*; or if the motor even still wants that timing that worked well with the carb.

Should know more this weekend.
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Please elaborate more on the timing? If your asking weather you can move the idle timing to 18* or not the answer is yes. The computer has inputs to set idle timing target and total timing all in by *** RPM.
 
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JoesEdge said:
You have a Magnum engine in yours right? With the Magnum EFI? You've been on the Friday Spring Fling and/or Fall Fling cruises to Malibu? I think I have seen your car, but I might be mistaken.
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Yes, the Coronet will miss Fall Fling this year. Was running the Edelbrock RPM and 850 Demon. First time in years.
 
JoesEdge said:
You have a Magnum engine in yours right? With the Magnum EFI? You've been on the Friday Spring Fling and/or Fall Fling cruises to Malibu? I think I have seen your car, but I might be mistaken.
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Yes, the Sunfire Yellow '68 Barracuda with a 408"Magnum running a reflashed Mopar ECM. Been on both cruises several times.

Spring Fling (Medium).PNG


Airbox2.JPG
 
Mopar73340 said:
Please elaborate more on the timing? If your asking weather you can move the idle timing to 18* or not the answer is yes. The computer has inputs to set idle timing target and total timing all in by *** RPM.
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Excellent, yes, this is what I was asking. DennisH's 440 liked about 18* initial and 34 total with the carb. Just wondered if we can set that up with the Proflo 4.
 
jbc426 said:
Yes, the Sunfire Yellow '68 Barracuda with a 408"Magnum running a reflashed Mopar ECM. Been on both cruises several times.

View attachment 1715237151

View attachment 1715237152
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Yeah, I love how you have the Magnum serpentine setup including A/C. One of these days I'll have to pick your brain how you got those A/C hoses and stuff because we're thinking of adding Vintage Air to our Duster because it gets hot in the summer.

The thing is, I want to change my LA front timing cover over to a Magnum setup. I have the timing cover already. I also have the brackets for the alternator and A/C too.

Going the Fuel Injection route will make having a mechanical fuel pump pointless, therefore it seems like it would be a perfect time to switch over to a Magnum serpentine setup (since there is no mechanical fuel pump provision in the timing cover). Besides, it will go perfectly with my EQ Magnum heads. ;)
 
jbc426 said:
Excellent, yes, this is what I was asking. DennisH's 440 liked about 18* initial and 34 total with the carb. Just wondered if we can set that up with the Proflo 4.
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I haven't got that far with the Proflo 4 but with the Proflo 3 you can set the idle timing target to at least 25* (I haven't gone farther than that) along with total in by xxxRPM. There is also a vacuum advance that is adjustable if you want to use it. Hard to believe this would have been taken away with the Proflo 4. Idle RPM is adjustable and so are the AFR ratio targets, pump shot, starting fuel can be added or subtracted, and cold idle fuel can be added or subtracted. I'm sure I'm forgetting something but it has plenty of user adjustments.
 
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