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Ziegelsteinfaust · 06-22-2018, 09:30 AM

I helped a friend put a 411 Vortec fuel injection kit into his truck, and all in he spent about $2000. He used alot of Craigslist finds to get it done, and it took about a year before the swap.

He got a suburban that needed a transmission for the parts. Rebuilt the engine/transmission, and put them in his truck with a carb setup he already had. Then he carefully removed the harness, and found a 411 pcm from a van. Purchased a HP tuners kit, and found a single plane with injectors cheap. Fixed that up nice, and made a elbow for the throttle body. Got the throttle body ported, and modified the harness to work with the injectors. Installed some fuel pump into the tank, and began the swap.

Everything bolted up easily, and there was a few snags with tuning. Getting a program that he could modify was the hardest part. Then he just started writing his own stuff till it would run well enough to dial in. Which took a couple days of free time. After that it ran amazing.

It was about a 400/415TQ motor, and it could get 20 pretty easy on the highway. The single plane probably was to big by a bit, and a dual plane would of bumped the torque up quite a bit.

06-22-2018, 09:30 AM	#3
Ziegelsteinfaust Registered User Join Date: Dec 2012 Location: Temple City Posts: 3,666	Re: '79 GMC Carb to EFI? I helped a friend put a 411 Vortec fuel injection kit into his truck, and all in he spent about $2000. He used alot of Craigslist finds to get it done, and it took about a year before the swap. He got a suburban that needed a transmission for the parts. Rebuilt the engine/transmission, and put them in his truck with a carb setup he already had. Then he carefully removed the harness, and found a 411 pcm from a van. Purchased a HP tuners kit, and found a single plane with injectors cheap. Fixed that up nice, and made a elbow for the throttle body. Got the throttle body ported, and modified the harness to work with the injectors. Installed some fuel pump into the tank, and began the swap. Everything bolted up easily, and there was a few snags with tuning. Getting a program that he could modify was the hardest part. Then he just started writing his own stuff till it would run well enough to dial in. Which took a couple days of free time. After that it ran amazing. It was about a 400/415TQ motor, and it could get 20 pretty easy on the highway. The single plane probably was to big by a bit, and a dual plane would of bumped the torque up quite a bit.