fuel injection upgrade

[skipjack99]

looking for opinions on upgrading to fuel injection. I have a 71 Barracuda with a 383 that I am rebuilding, I need to get a new intake manifold for this engine because it was missing. I was looking at some of the kits offered by Holly with the hyperspark distributor and sniper throttle body but also Elderbrock's kit with the port injection. What are you guys using or your recomendations?

 

[Chryco Psycho]

My opinion is Multi port is the better option if you can handle the cost , virtually every new car is multiport not throttle body injection .
I built a system for a customer using components from various suppliers , 1200 CFM throttle body , SDSEFI computer , Bosch injectors , Walbro fuel pumps , , crank trigger , it had a small hand held computer you could adjust while driving if you sat in the passenger seat while another person drove . The system was great cold starts etc .
the easiest is obviously Throttle body injection , you need to swap the fuel tank / pump for the pressure & then you run a wet intake system bolted to virtually any intake .

 

[KarenL]

I have the Edelbrock ProFlow 2 fuel injection system. It has been installed for over 10 years on my 70 challenger 340. I really like it. The mechanic did say the system computer adjustment is in between the allowable settings, but it runs well. The idle is little high upon cold weather starting, but then comes down to normal idle after driving for 5 minutes.

 

[Xcudame]

What sucks is there isn't any 383/400 intake manifold with fuel injector bungs. But the great thing is the 384/400 likes single plane intakes as they like to rev! So pay the money and have someone weld in bungs into a single plane aluminum intake for your 383 and multiple port fuel injection with that! I'm using an old Edelbrock TM6 for my 383! (One of those many projects I'm working on!)

 

[540HemiCuda]

My opinion is Multi port is the better option if you can handle the cost , virtually every new car is multiport not throttle body injection .
I built a system for a customer using components from various suppliers , 1200 CFM throttle body , SDSEFI computer , Bosch injectors , Walbro fuel pumps , , crank trigger , it had a small hand held computer you could adjust while driving if you sat in the passenger seat while another person drove . The system was great cold starts etc .
the easiest is obviously Throttle body injection , you need to swap the fuel tank / pump for the pressure & then you run a wet intake system bolted to virtually any intake .

I completely agree that retrofit throttle body EFI is really nothing more than an electric carburetor and is as archaic as a carburetor as far as the OEs are concerned.

While designing, installing, and tuning an EFI system may be within your abilities, wouldn't it be prudent to ask the OP what his abilities are BEFORE going into details that may have no application to him?

I see a good number of these retrofit EFI kits for sale on Marketplace as well as other sites. The OP may be able to save some money by checking them out.

My opinion is that these retrofit systems are no better than a well tuned carb. And a carb professionally tuned for the particular application is cheaper and easier to install to boot.

Now, modern multi point systems engineered and employed by the OEs are vastly superior to any central point, wet manifold system. But let's be honest, that type of system is far beyond most car guy's abilities.

.

 

[MoparCarGuy]

looking for opinions on upgrading to fuel injection. I have a 71 Barracuda with a 383 that I am rebuilding, I need to get a new intake manifold for this engine because it was missing. I was looking at some of the kits offered by Holly with the hyperspark distributor and sniper throttle body but also Elderbrock's kit with the port injection. What are you guys using or your recomendations?

There are many considerations in deciding to go to EFI. Do your research. As some have said, this is a knowledge-intensive upgrade that is expensive as well.
Check out EFI Systems Pro. They have a lot of information in the Pro Hangout section and their technicians are available via phone.

That being said, I went with the Holley Terminator X Stealth system.
Hyperspark ignition box, Hyperspark coil & distributor, Tanks Inc EFI fuel tank/sending unit with Walbro fuel pump, Aeromotive SS filter housing with 10 micron filter, and a Holley Pro Billet regulator.
The benefits of the Terminator X are well worth the extra $ with number one being the ECU is not located within the Stealth throttle body. The ECU is separate and can be located under your dash. The wiring harness is perfect for E-Body installations. My ECU is under the dash on the driver's side cowl. My ignition box is under the dash above the transmission tunnel (lower interior firewall). The ECU is not exposed to underhood temps.
The other benefits include constant AFR adjustment and full Hyperspark control of the timing.
Search this forum for Terminator X and you will find more information.

Good luck on your project. EFI self-installation requires a good amount of electrical and fabrication knowledge.

 

[Katfish]

Good input about asking the OP what the goal is.
I did EFI on my 340 10yrs ago using FiTech system. Easy install and was big improvement over the carb. I didn’t know how, or the interest, in fiddling with the carb endlessly.
It wasn't cheap, as mentioned, you need to upgrade the tank and fuel system.
I used it as a stepping stone, as my end goal was a 3G swap, so I knew I needed to do all the fuel delivery updates eventually.

Be honest with yourself, how much, and how are you going to drive the car?
Once a month to local car show or to get ice cream? Don't bother.
The only reason to go EFI, would be if you at least drive the car enough to actually require changing the oil because of mileage. Most of these cars go less than 500 miles a year, why bother?
You could easily be into it for $4-5k before you blink.

 

[skipjack99]

My opinion is Multi port is the better option if you can handle the cost , virtually every new car is multiport not throttle body injection .
I built a system for a customer using components from various suppliers , 1200 CFM throttle body , SDSEFI computer , Bosch injectors , Walbro fuel pumps , , crank trigger , it had a small hand held computer you could adjust while driving if you sat in the passenger seat while another person drove . The system was great cold starts etc .
the easiest is obviously Throttle body injection , you need to swap the fuel tank / pump for the pressure & then you run a wet intake system bolted to virtually any intake .

I was looking at that one from edelbrock but I can't find one that will fit on a 383

 

[skipjack99]

There are many considerations in deciding to go to EFI. Do your research. As some have said, this is a knowledge-intensive upgrade that is expensive as well.
Check out EFI Systems Pro. They have a lot of information in the Pro Hangout section and their technicians are available via phone.

That being said, I went with the Holley Terminator X Stealth system.
Hyperspark ignition box, Hyperspark coil & distributor, Tanks Inc EFI fuel tank/sending unit with Walbro fuel pump, Aeromotive SS filter housing with 10 micron filter, and a Holley Pro Billet regulator.
The benefits of the Terminator X are well worth the extra $ with number one being the ECU is not located within the Stealth throttle body. The ECU is separate and can be located under your dash. The wiring harness is perfect for E-Body installations. My ECU is under the dash on the driver's side cowl. My ignition box is under the dash above the transmission tunnel (lower interior firewall). The ECU is not exposed to underhood temps.
The other benefits include constant AFR adjustment and full Hyperspark control of the timing.
Search this forum for Terminator X and you will find more information.

Good luck on your project. EFI self-installation requires a good amount of electrical and fabrication knowledge.

View attachment 155722

Thanks! I sent EFI systems and email to build a system

 

[skipjack99]

Good input about asking the OP what the goal is.
I did EFI on my 340 10yrs ago using FiTech system. Easy install and was big improvement over the carb. I didn’t know how, or the interest, in fiddling with the carb endlessly.
It wasn't cheap, as mentioned, you need to upgrade the tank and fuel system.
I used it as a stepping stone, as my end goal was a 3G swap, so I knew I needed to do all the fuel delivery updates eventually.

Be honest with yourself, how much, and how are you going to drive the car?
Once a month to local car show or to get ice cream? Don't bother.
The only reason to go EFI, would be if you at least drive the car enough to actually require changing the oil because of mileage. Most of these cars go less than 500 miles a year, why bother?
You could easily be into it for $4-5k before you blink.

this would be a daily driver, The engine has no carb or intake manifold so I need to start with something