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Thread: Modified ls3 tune help

  1. #1
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    Modified ls3 tune help

    New to tuning and could use a little help. Got an ls3 with btr stage 4 f35 cam, 102mm throttle body, fitech intake manifold, 55lb injectors, full exhaust. On this tune file attatched it is running but not the best. First car im tuning and still learing. Im thinking my startup airflow and braf table are probably off but not sure how much. Also wondering if i should add a few degrees of timing. Did some maf tuning and started doing speed density tuning. Will start but i need to give it a little throttle to do so, then will idle real low. Any input would be great on things to change. I will post a log file tomorrow.
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  2. #2
    Tuning Addict blindsquirrel's Avatar
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    Step 1 is injector data. All you've changed so far is the flow rate.
    GM Gen4 Injectors v2.1.xls
    ChatGPT is the end result of someone assuming that if they gather up a large enough pile of sh*t it will spontaneously generate a pony.

  3. #3
    Senior Tuner edcmat-l1's Avatar
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    Hate to beat you up and parts selection but that's a pretty terrible combination. Especially for a newbee tuner.

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  4. #4
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    You would be better off using the stock injectors. They would cover that power easily.

    Also the throttle body will cause more issues than it's worth. I've never seen more than 1-2 rhwp on a setup like that with one.
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  5. #5
    Senior Tuner edcmat-l1's Avatar
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    Quote Originally Posted by Alvin View Post
    You would be better off using the stock injectors. They would cover that power easily.

    Also the throttle body will cause more issues than it's worth. I've never seen more than 1-2 rhwp on a setup like that with one.
    And the cam and intake will absolutely destroy the low-end torque and any sense of decent driveability.

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