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    1. #1
      Join Date
      Aug 2011
      Location
      Sevierville, TN
      Posts
      524
      Country Flag: United States

      Stand alone fuel management

      I'm throwing this out to get some ideas, opinions, and make a decision one way or another.

      I currently have a carbureted LS1 in my 68 C10. The carbed setup utilizes an MSD ignition control box to fire the coil packs based off the cam sensor and crank sensors. I'm considering making a switch to EFI within a year or so. Most will tell me to just use a factory ECM/PCM and electronics, which I don't really have a problem with. It's most certainly a tried and true system with many benefits.

      Here's what I want to know, though. MSD offers a harness that allows use of an EFI system, but still allows timing controls without entering an ECM/PCM, which should allow the use of a stand alone fuel management system. The problem is I don't know enough about EFI and which system is best, and which one I should look into for doing this. Also, is there any major advantages of doing this over the factory EFI system?

      Matt Kenner

      68 C10 stepside

      If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue


    2. #2
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      16,117
      Country Flag: United States
      Quote Originally Posted by Slick68 View Post
      I'm throwing this out to get some ideas, opinions, and make a decision one way or another.

      I currently have a carbureted LS1 in my 68 C10. The carbed setup utilizes an MSD ignition control box to fire the coil packs based off the cam sensor and crank sensors. I'm considering making a switch to EFI within a year or so. Most will tell me to just use a factory ECM/PCM and electronics, which I don't really have a problem with. It's most certainly a tried and true system with many benefits.

      Here's what I want to know, though. MSD offers a harness that allows use of an EFI system, but still allows timing controls without entering an ECM/PCM, which should allow the use of a stand alone fuel management system. The problem is I don't know enough about EFI and which system is best, and which one I should look into for doing this. Also, is there any major advantages of doing this over the factory EFI system?
      Your best bet is to sell the MSD box and and add a stock manifold and related EFI items, including a stock ECU. If you have a carbed LS1 now, I would add a LS6 intake and throttle body. I bet you will gain 30-40 lb/ft of torque on the low end.

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
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      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    3. #3
      Join Date
      Aug 2011
      Location
      Sevierville, TN
      Posts
      524
      Country Flag: United States
      Quote Originally Posted by andrewb70 View Post
      Your best bet is to sell the MSD box and and add a stock manifold and related EFI items, including a stock ECU. If you have a carbed LS1 now, I would add a LS6 intake and throttle body. I bet you will gain 30-40 lb/ft of torque on the low end.

      Andrew
      That's probably the route I'll take. I'll most likely use the Edelbrock intake, though since I have my coil packs relocated to the back of the engine.
      Matt Kenner

      68 C10 stepside

      If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue


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