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Please talk me into Edelbrock PRO FLO 4

CharlesC83

CharlesC83

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Dear CK5, I'm aware of "The Injection Section" I've read the Pro Flo 4 thread twice. I still want anybody here with experience with this kit to chime in. And tell me it will be the best thing I will ever place upon this truck. No, I'm not going to LS swap any time soon.

Current Vehicle and Setup is as Follows.

1979 K10 Step Side short Box
D60/14BFF 5.13's
38" TSL
5"ish of lift
SM465/NP205
350 with barely 400 miles since rebuilt by me.
.040" over Flat top pistons,
Comp Cams 0.480 int./0.498 exh. 226 int./234 exh. Lobe Separation (degrees):111
1.5 ratio roller tip rockers
Edelbrock 5089 E street heads
Hedman headers

Ran Gm TBI on an edelbrock 2701 intake, it ran poorly after the rebuild and cam/heads, attempted to try some adjustments, no success. Did try a few chips from the guy who made my kit and some data logging. It liked to rolling stall and run lean. And did not want to rev up into the 5K range.


In true moron fashion I swapped to an Edelbrock 7501 Air Gap and AVS 650 carb. Runs like shit cold, when it warms up its OK.

I want the Pro FLO 4. I May have even ordered it by the time the thread gains any momentum. I've been close to ordering it for a While. I love this truck and it drives well for what it is and the engine pulls hard when it is warmed up.

If I order it, I will be losing the fuel tank in the back and switch to a fuel cell that I want to run in the Bed with an In tank pump. Current tank is not baffled and is in the rear where the spare tire used to be, the saddle tanks are gone. but this tank is close to my rear axle. And it would be nice to have the pump and stuff easy access.

Let me know what a Tard I am. Sorry for the long windedness. Hope anybody read this far.:flipoff7:

Posted this in the Garage with hopes it will see more traffic.
 
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The drivability of my PF4 system is great. Fuel mileage has improved. I'm still trying to nail cold start. It doesn't start the greatest if coolant is below 100° and I frequently have to apply some gas pedal to shift into gear and stay running.

I think I'm the only one on CK5 that's happy with the Sniper EFI on my 454 crew cab. It starts right up in any temperature and just runs. Negative to that system was I needed to have the ECU replaced in the first year but since it's been running good.

All that being said, after running these 2 systems I would probably buy a Terminator Stealth the next time I need to do an EFI conversion.
 
The biggest thing with these aftermarket EFI systems is to get the install right. Fuel system functioning properly, wire power straight to the battery, keep all the sensor wiring away from ignition interference, and properly grounded motor/battery/chassis.
 
Bent77 said:
Running a ep381. It’s rated at 215lph, but hit recommends 255lph

mine also has the 31 gal TBi tank behind the axle

had a k5 with the tank in the bed. I’ll never waste that space again
Click to expand...


Nice, appreciate the advice! They do make the same tank I am currently (25 gal) running for an 87 blazer with TBI so it has a baffle tray around where the pump will sit. And it is way less than any fuel cell.

I just would wanna know I can stuff the correct pump inside it for the PSI pro flo wants. I hear you on bed space. Plus my bed is still running the Wood from 1979.....:eek2:

I suppose I could run a 31 If it wont hit my axle. I will check tonight. I am moving my rear axle back an inch after work today.
 
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mrk5 said:
The drivability of my PF4 system is great. Fuel mileage has improved. I'm still trying to nail cold start. It doesn't start the greatest if coolant is below 100° and I frequently have to apply some gas pedal to shift into gear and stay running.

I think I'm the only one on CK5 that's happy with the Sniper EFI on my 454 crew cab. It starts right up in any temperature and just runs. Negative to that system was I needed to have the ECU replaced in the first year but since it's been running good.

All that being said, after running these 2 systems I would probably buy a Terminator Stealth the next time I need to do an EFI conversion.
Click to expand...

I am super leery of any TBI style at this point. I have had old holley pro jection and it sucked, then GM TBI that is OK if on a flat stock 350. No, I never got into burning my own PROMS. I like GM TBI do not get me wrong. I have a Howell kit on my CJ5 and it runs great, all stock 258 though.
 
The new TBI systems are nothing like the old pro-jection. There's also the MSD Atomic EFI.

If you don't want TBI, about the only option I'm aware of is the PF4 unless you want to spend over $3k for a Holley system.

A lot of it also depends on how much fiddling you like to do. If you like to have the ability to modify and do a lot of tuning the PF4 doesn't offer near as much as the Holley. For me the PF4 is kinda like an Apple phone and the Holley is kinda like an Android phone. The PF4 is pretty much all set up and ready for you to run and a majority of people won't have a problem with it. The Holley might not be as consistent and you may have to do some additional tweaking but it also allows you to do a lot more beyond the cookie cutter system and you can do a lot more things than the PF4 will let you.

It sounds like your mind is already made up so good luck with the PF4. I'm sure you'll enjoy it. :thumb:
 
mrk5 said:
The new TBI systems are nothing like the old pro-jection. There's also the MSD Atomic EFI.

If you don't want TBI, about the only option I'm aware of is the PF4 unless you want to spend over $3k for a Holley system.

A lot of it also depends on how much fiddling you like to do. If you like to have the ability to modify and do a lot of tuning the PF4 doesn't offer near as much as the Holley. For me the PF4 is kinda like an Apple phone and the Holley is kinda like an Android phone. The PF4 is pretty much all set up and ready for you to run and a majority of people won't have a problem with it. The Holley might not be as consistent and you may have to do some additional tweaking but it also allows you to do a lot more beyond the cookie cutter system and you can do a lot more things than the PF4 will let you.

It sounds like your mind is already made up so good luck with the PF4. I'm sure you'll enjoy it. :thumb:
Click to expand...

I am open to any persons experience here that is honest on our style of trucks. I am not a huge tune all the time guy, I honestly hate it. I am an auto tech for a living and really like to take off in my own rig once in a while and just drive. I am aware that this is not a standard rig and will have to be messed with constantly, but it would be nice to have a user friendly EFI.

One thing I did not research and learned After the fact, is that Air gap intakes are not good for cold climates. So, i felt shitty after i learned that after installing one. Makes me wonder If the Holley sniper would run on top of the air gap for beans cold? Then the rest of me says get the Pro Flo.....
 
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I think you would be happy with the PF4 system and it should work nicely with your engine. Your heads seem to flow well so the 1000cfm TB will help with some power and the system just works out of the box. I've been having good luck with cold starts and drivability. The Edelbrock tech's are helpful. I know its more expensive some others but you get more in the box. I'm probably one of the few that has put mine on the dyno to see if the timing and A/F ratio would help tweaking. The system was spot on and my tuner was impressed with it that I tuned it myself. I figured with the drivetrain loss, 440 at the crank with a SBC 406, AFR heads. I got the PF4 without the tablet and like using a used Android Note phone which can be had cheap these days or you can just any android phone for tuning. The PF4 digital gauges are nice and nice to have at all time on the phone/tablet. You can also interface other gauges such as the Banks or Dakota to interface with the PF4 ECU. Overall I've been impressed with the system.20200922_120150.jpg
20200922_121801.jpg
 
Shawn said:
I think you would be happy with the PF4 system and it should work nicely with your engine. Your heads seem to flow well so the 1000cfm TB will help with some power and the system just works out of the box. I've been having good luck with cold starts and drivability. The Edelbrock tech's are helpful. I know its more expensive some others but you get more in the box. I'm probably one of the few that has put mine on the dyno to see if the timing and A/F ratio would help tweaking. The system was spot on and my tuner was impressed with it that I tuned it myself. I figured with the drivetrain loss, 440 at the crank with a SBC 406, AFR heads. I got the PF4 without the tablet and like using a used Android Note phone which can be had cheap these days or you can just any android phone for tuning. The PF4 digital gauges are nice and nice to have at all time on the phone/tablet. You can also interface other gauges such as the Banks or Dakota to interface with the PF4 ECU. Overall I've been impressed with the system.View attachment 366054
View attachment 366055
Click to expand...

I can search also, but what coil are you running? I have a new MSD blaster SS lying around. I also have new MSD 6 Off Road, I am assuming the PF4 will play with the MSD? Any thoughts?
 
This is the coil I ended up using with the Edlebrock Pro-FLo 4. MSD Part # 8223. This one makes it easier for the coil wire and is available at most parts stores. Since the coil is close to distributor I tried a very short 4" wire but that did not turn out well and is way too short. Ended with a longer one that does half circle around distributor to the coil. Same thing as the Blaster 2 but with a different terminal. Just be sure its on their approved list. First one I bought was not.
https://www.summitracing.com/parts/msd-8223

I use to have the MSD 6 off-road until I tried to start the engine and found it to be bad. You can see it in the picture below. Not sure what happened. When reading up, it appears many to have issues going bad for no reason. Its all epoxied inside so you can't even open it. Seem other MSD multi-spark models also have issues. I might get another one down the road but for now, the coil alone works fine. The PF4 works with these systems.
k5engsm.jpg
 
Just checked and its a no-go on your SS coil unless its safe to use it with multi-discharge box.

If not using a coil from this list, ensure that the coil’s primary resistance is at least 0.6 Ohms and inductance is at least 6.0mH. Pro Flo 4 can NOT directly fire low resistance, low inductance coils that are intended for use with a CDI box otherwise severe damage may result. If choosing to use a CDI type coil, a CDI box must also be used. Damage caused by improper coil selection is not covered under warranty. A CDI box is recommended for high horsepower and high rpm (>6,500 rpm) engines.

Note that Edelbrock ignition coils part #22740, #22741 & #22742 are intended for use with the Edelbrock Max-Fire distributors only and are NOT compatible with the Pro Flo 4. Using these coils with the Pro Flo 4 may damage the system.

Example of an UNACCEPTABLE coil that will damage your Pro Flo 4 ECU is the MSD 8207 Blaster SS coil: https://www.holley.com/products/igni...ils/parts/8207 Its primary resistance is 0.355 ohms and is below the minimum primary resistance spec.
 
Shawn said:
This is the coil I ended up using with the Edlebrock Pro-FLo 4. MSD Part # 8223. This one makes it easier for the coil wire and is available at most parts stores. Since the coil is close to distributor I tried a very short 4" wire but that did not turn out well and is way too short. Ended with a longer one that does half circle around distributor to the coil. Same thing as the Blaster 2 but with a different terminal. Just be sure its on their approved list. First one I bought was not.
https://www.summitracing.com/parts/msd-8223

I use to have the MSD 6 off-road until I tried to start the engine and found it to be bad. You can see it in the picture below. Not sure what happened. When reading up, it appears many to have issues going bad for no reason. Its all epoxied inside so you can't even open it. Seem other MSD multi-spark models also have issues. I might get another one down the road but for now, the coil alone works fine. The PF4 works with these systems.
View attachment 366060
Click to expand...
excellent info. My MSD 6 is the new version, not saying its better, but I have had that box you show there 14 years ago, it worked ok for me then.

I am seeing if I can piece together a cheaper blazer style fuel tank with the right pump for less still and will most likely order the system tonight from Summit. I have talked to edelbrock tech myself at least 3 times about my AVS carb. And the guy Mike there always wants me to "plop" a PF4 on top on my new engine.....yeah 1800$ plus another tank/pump setup. So, i just wanna do homework and ask questions before making more mistakes.
 
CharlesC83 said:
Nice, appreciate the advice! They do make the same tank I am currently (25 gal) running for an 87 blazer with TBI so it has a baffle tray around where the pump will sit. And it is way less than any fuel cell.

I just would wanna know I can stuff the correct pump inside it for the PSI pro flo wants. I hear you on bed space. Plus my bed is still running the Wood from 1979.....:eek2:

I suppose I could run a 31 If it wont hit my axle. I will check tonight. I am moving my rear axle back an inch after work today.
Click to expand...

the 31 will fit, you just need to keep it moved toward the back of the truck. I run that tank on my SWB K10 with the 381 pump anf FiTech.

for the pump you can run the Walbro GSS342 if you don't want to run the Delco 381. Both have proven to work fine but I chose to run the Walbro with the PF4 and a 31 gallon TBI tank and sending unit.
https://www.amazon.com/Walbro-GSS34...61&imprToken=aS5TFiypYCHq2qlDa0Kc.w&slotNum=0
 
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