5.7 TBI tuning

Discussion in 'Engine Performance + Maintenance' started by brinx182, May 31, 2020.

Car Parts
  1. brinx182

    brinx182 Newbie

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    I have a 89 c1500 with the 5.7 tbi and I want to get into tuning. This is my spare run around vehicle and I think it’s a decent platform to start considering it is all stock and I have replaced most all maintenance parts and it runs well. I’m debating between getting a chip burner or saving for the EBL flash system. I have a laptop that is more than capable, I just have a few questions.
    1. Is there much work needed on these vehicles to install the EBL system?
    2. Do I need a wideband o2, and does the EBL flash support it? I’d like to be able to safely change my fueling numbers without running too lean
    3. Do you think it is a reliable system? I keep hearing about how the earlier trucks are prone to “chip creep” but I’m unsure if a similar issue would fry the EBL
    4. Can a beginner with patience and a good amount of tuning knowledge(not experience) make decent improvements on a mostly stock vehicle?
     
  2. PlayingWithTBI

    PlayingWithTBI Desert Old Guy

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    1. No, you just send your 7747 (I'm guessing) ECM in and RBob will update it with the EBL Flash-II, it plugs right in to your harnesses. IIRC you may have to move one wire in the connector.
    2. you don't need it but you'll be able to tune it better even at WOT.
    3. Yes, the EBL doesn't use the old EPROMs it has 8 "Banks" on board that you can flash in ~4 seconds each, and switch banks on the fly.
    4. Yes, he supplies a lot of support and there's other websites that can help too. Here's one with a dedicated thread to the EBL. Started back in 2006 and still going - 95 pages strong, HTH

    https://www.thirdgen.org/forums/diy-prom/356351-tuning-ebl.html
     
  3. brinx182

    brinx182 Newbie

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    Thank you so much for the feedback! I think I may be able to get it soon and I’d love to be able to support a company that, as I’ve read, has such great customer support
     

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