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  #1  
Old 10-08-2015, 10:24 AM
Yadkin Yadkin is offline
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Default Efi

I'm starting to think about my next mod, and that would be electronic fuel injection. Professional Products has a throttle body system that looks nearly foolproof, Powerjection III. Remanufactured kits are about $1100. I figure another 2-300 for supply and return lines and their fuel on demand module, which would reduce the pump noise at idle. Not really sure how I would install the return on my existing tank though.

http://professional-products.com/fue...olished-finish
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Old 10-08-2015, 10:00 PM
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franklin franklin is offline
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Please keep us posted on your project! I would love to do something with F.I.
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Old 10-09-2015, 10:06 AM
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This won't be for a while, as I need to iron out some other issues and let my wallet rest a bit. I'd like to know what others have experienced with these systems.

I intended to install an oxygen sensor in the exhaust to help me tune the carburetor, and I actually have one with a bung to weld on when I change out my mufflers. But I'm afraid my old carburetor isn't long for this world. The E85 gas is probably eating it up; as I'm experiencing really poor fuel mileage.

Instead of buying a new after market carburetor I'd rather spend a little more for better starting and driveability.
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Old 10-09-2015, 09:46 PM
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I just looked at a youtube video about that system and the guys says $1650 to $1750 to get it up and running but that's a pretty good price considering the Holley EFI is about $2300.
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Old 10-09-2015, 10:43 PM
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Summitracing.com is about the only good vendor who KNOWS EFI systems. You should talk with them.

They sold me a unit, made by a company who ONLY makes EFI systems. FAST (Fuel, Air, Spark Technology). I looked at Holly, Edelbrock, MSD, and many more. Then, I bought a FAST Fuel Injection EZ-EFI Self-Tuning Fuel Injection System.

The price depends on what components you need. If you have a programmer or an electric fuel pump the price drops dramatically.

When I install it, I will post pictures. - Dave
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Old 10-10-2015, 10:19 AM
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The price also depends on if you get a remanufactured unit. Pro products advertise these on their site for about 60% of new.

Dave, why did you choose the FAST system?
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Old 10-11-2015, 03:05 AM
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The FAST system bolts right on our 4X4 intake manifolds. A few tasks are sometimes too much for the typical backyard mechanic:
Welding the bung into the exhaust,
Mounting an electric fuel pump system
Running a return fuel line.

The return line can be small. Very small. My fuel tanks have a vent that I can simply tap into so that part is easy. I weld and I fabricate. I prefer to put the pump inside the fuel tank but that isn't necessary for this conversion.

EFI atomizes the fuel under 50+ psi so a lot more of the fuel is burned. The oxygen sensor maintains 14.7:1 air-to-fuel ratio which does a few things:
Correct mixture optimizes horsepower which optimizes economy. This system pays for itself in fuel savings alone. EFI opens the door to accessories like 'remote start' and it puts an end to vapor lock forever. These systems are like modern cars where you simply turn the key and forget having some days where your engine runs better than others. Temperature, humidity, altitude.. none of this matters anymore. When is the last time you heard of a EFI engine flooding? Those days are gone too.

I personally spoke with the Ford Racing guys, Edelbrock guys, and many more at the last Detroit Autorama. All the systems are good. Let's just say they all beat the crap out of carburetion. Some systems cost more than others and some systems are meant for highly specialized engines, such as racing applications. I don't have that. This system simply asks if I have a stock cam, mild street cam or hot cam. That's it. The injectors are part of the throttle body as well as temp, barometric pressure and wide open throttle sensors. I can even use my stock air cleaner and nobody will be the wiser.

Summit recommended this system. They sell all the different systems but this one has the fewest returns and the greatest customer satisfaction. So, I try. - Dave
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Old 10-11-2015, 08:37 AM
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There is a vent on the top of my tank now. I have a rubber hose from that to my vapor recovery system. Is that where you ran your return? How do you keep the tank from running a vacuum?
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Old 10-11-2015, 10:10 PM
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Seriously? If your tank is vented, how can it run a vacuum OR a positive pressure? If you're not sure, use a vented gas tank cap.

My tank vents come off the top of the tank, go into the trunk with a high loop than exit just beside the filler neck. If I open my fuel filler door I can see the vent hole.
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Old 10-12-2015, 05:23 PM
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Mine's vented through a carbon canister. I have a sealed cap, the filler tube is vented just below the cap with a 1/2 hose. The small tank vent is an additional vent, probably not needed now, so I can run the return to it.

The FAST system has a lifetime warranty. The Performance Products is only 90 days.

What about an in tank fuel pump? How difficult is that to install with the OE sending unit? Does the pump just roll around on the bottom of the tank?

Last edited by Yadkin : 10-12-2015 at 11:46 PM.
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