Powerjection 3 vs, Fast EFI vs. ??? (Chatish) (1 Viewer)

[brokenparts]

I sold off my propane system and decided to go back to EFI. I think I've narrowed it down to the powerjection 3 system, Fast EFI system, and the new Holley Avenger system. Anyone here running one of those systems? Any comments, complaints, raves?

Powerjection:

Professional Products Online

Fast EFI:

Carb-to-EFI Conversion Has Never Been EZer

Holley:

Holley Performance Products Avenger EFI 4bbl Throttle Body Fuel Injection System 550-402

Also considering going back to the dynamic efi system but not sure it'll support the HP of my big block.

DynamicEFI

 

[Bret]

I have been pretty happy with my PJ3. Definately easy to set up and get running. Took more time too run fuel lines than anything else. I ended up getting a different fuel pump because the one that came with thhe kit was the high HP version and wwas a little noisy. Very likely because my fuel lines weren't big enough to support the flow on the suction side. The system can be a simple as plug and play or you can fiddle till your dizzy.

 

[lehiguy]

www.tbichips.com I have been running a modified TBI system with a chip from this guy that he made based on the datalogs I sent him. Runs extremely well and none of my parts are proprietary (all GM except the fuel pump which is Ford) which means easy replacement should something poop. Just a thought...

 

[brokenparts]

I have been pretty happy with my PJ3. Definately easy to set up and get running. Took more time too run fuel lines than anything else. I ended up getting a different fuel pump because the one that came with thhe kit was the high HP version and wwas a little noisy. Very likely because my fuel lines weren't big enough to support the flow on the suction side. The system can be a simple as plug and play or you can fiddle till your dizzy.

What size lines did you run?

 

[brokenparts]

which pump did you go with?

 

[fj40charles]

Personally, I would just buy a takeout SBC fuel injected engine and do an engine swap. The fuel injection systems in your links are going to be over $1000 in price.

I'd rather have factory fuel injection for reliability and other engine features.

 

[brokenparts]

Personally, I would just buy a takeout SBC fuel injected engine and do an engine swap. The fuel injection systems in your links are going to be over $1000 in price.

I'd rather have factory fuel injection for reliability and other engine features.

I would do that if I hadnt dropped a pretty penny on building my big block. Besides not too many 60s with a big block either. There is probably a reason for that but at this point I'm pretty set on leaving it.

 

[mookie]

454? if so i'd try to find one of the tbi versions in a junkyard and buy all the fuel injection parts off it, make an adapter plate to mount the throttle body to your manifold

 

[brokenparts]

454? if so i'd try to find one of the tbi versions in a junkyard and buy all the fuel injection parts off it, make an adapter plate to mount the throttle body to your manifold

Yes, 454 (well bored .30 over). I was thinking about going that route and using the dynamic EFI unit to tune but the more I think about it and start adding up the cost I dont think I"ll be spending that much more on a brand new system. I've gone the junkyard route before and yes you can save some money but you also drag along many headaches with it too. Fueling/cfms might also be a problem using factory components too. The holley calculator for cfms had it right at 750.

 

[brokenparts]

General details about my motor:

rebuilt (rings, crank polish, bore 30 over, etc) mid 80's 454 w/~ 9.5 to 1 compression
-x4 262 cam (lift: .505/.515 duration 262/270 lobe sep 111)
-2.19 1.88 stainless valves
-shaved, pocket ported 049 heads
-ported dual plane E-brock intake
-forged flat top pistons
-decked block
-Roller tip rockers

 

[mookie]

bygawd son, sounds like some serious whompow right there....you'd probably at least need a bigger throttle body, stage II injectors, and an adjustable fuel pressure regulator if you went with the stock seup.....hell might as well go with aftermarket from the getgo

 

[Bret]

What size lines did you run?

I have 3/8th supply and 1/4" return. I really wanted to filter the fuel going into the pump, but you need a very free flowing filter to not restrict it. I ended up with a TRE fuel pump, barely audible with no top and doors on. Fuel pump is inside pass side frame rail just in front of rear crossmember.

TREperformance.com - TRE 255 LPH Fuel Pumps - Similar To Walbro

Not the same pump I used but right company. Mine was a inline version

 

[brokenparts]

I have 3/8th supply and 1/4" return. I really wanted to filter the fuel going into the pump, but you need a very free flowing filter to not restrict it. I ended up with a TRE fuel pump, barely audible with no top and doors on. Fuel pump is inside pass side frame rail just in front of rear crossmember.

TREperformance.com - TRE 255 LPH Fuel Pumps - Similar To Walbro

awesome... I appreciate your help. Still trying to nail down the details before taking the plunge on the powerjection 3 but its looking more and more like that is what I am going to do.

 

[Bret]

It isn't a ferfect solution for everyone, but for what I wanted it is working well. My primary issue was off camber and climbs/descents. While at Chocco it idled perfectly with the front end buried and the rear in the air and did the same with the nose in the air. Side to side was also running smoothly long after my butt-muscles got tired of clenching the seat. It isn't perfect for hard launches (at least not the way I have it set up) and I still get a little fuel smell while hot rodding it around. Mileage was a little better but not near enough to use it as justification for the change.

PM sent

 

[brokenparts]

So far it fits the bill. I need something that is going to run off camber, fuel my thirsty my motor sufficiently, simple to trouble shoot, and get decent mileage. Sounds like this system will satisfy my needs. I am somewhat familar with tuning as I did some with my dybanmic efi ecm when I was running a small block. I am not a "tuner" by any means but I understand the basic features and concepts of throttle body efi.


Kinda surprised Sixty hasn't chimed in yet... that dude is a genius with the dynamic system.

 

[boots4]

I do find myself chuckling when you talk about mileage and you're going to be running a big block. The fun thing is that it won't be much worst than a out-of-tune 2F but with enormously more power. While a self learning system is nice I'd rather have more control over the tuning too. Then it can really be tailored to your vehicle and your driving style.

 

[brokenparts]

I do find myself chuckling when you talk about mileage and you're going to be running a big block. The fun thing is that it won't be much worst than a out-of-tune 2F but with enormously more power. While a self learning system is nice I'd rather have more control over the tuning too. Then it can really be tailored to your vehicle and your driving style.

I know I know... mileage. Running the pane would have MUCH MUCH worse. I just bought a 20 gallon cell so I can follow you and Clint around to trails and not have to trailer it. The nice thing about the powerjection system compared to the fast system is that you can use the self learn feature OR tune it yourself via a laptop.

 

[lehiguy]

A tweaked TBI system utilizing a TB from a 454 will keep up with your beast just fine, they are 750CFM without mods. You can have them bored even larger if you wish. I just sold one on Flea Bay a few weeks ago. It was more than my 350 horse SBC needed, I'm good with 600CFM overall although I lost a touch at high RPM, WOT but I don't care, it isn't a race car.

 

[Bret]

What are the real world costs associated with that system? What sensors are used and how expensive are they? What mods are required to the ECM/TBI and how do you change the programming? When I originally looked into the 454 TBI it didn't look like there was a "simple" answer.

 

[brokenparts]

What are the real world costs associated with that system? What sensors are used and how expensive are they? What mods are required to the ECM/TBI and how do you change the programming? When I originally looked into the 454 TBI it didn't look like there was a "simple" answer.

I agree Bret... by the time you track down all the sensors, harness, ecm, program a chip, etc. I dont think you are saving all that much money and I dont think you will get the same level of performance.

By the way... I ordered the Powerjection system although its on back order for 3-4 weeks. I've been following this thread which has a TON of info in it.

Powerjection III Install and Review - V8Buick.com