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Thread: Help with tune

  1. #1
    Tuner in Training
    Join Date
    May 2020
    Posts
    18

    Help with tune

    why does my truck not chop as hard as my buddys truck we have the same cam (elgin sloppy stage 2). His also idles around 750 rpm when mine idles at around 850? I would really appreciate some help with this thanks in advance.

    Cam specs are
    Cam Lift Intake: .350
    Cam Lift Exhaust: .350
    Valve Lift Intake: .595
    Valve Lift Exhaust: .595
    Adv. Duration Intake: 296?
    Adv. Duration Exhaust: 299?
    Duration @ .050 Cam Lift Intake: 238?
    Duration @ .050 Cam Lift Exhaust: 242?
    Intake Opens at: 11? BTC
    Intake Closes at: 47? ABC
    Exhaust Opens at: 57? BBC
    Exhaust Closes at: 5? ATC
    Camshaft Overlap: 73?
    Lobe Line Intake: 108?
    Lobe Line Exhaust: 116?
    Operating Power Range: 2,200-5,400 rpm
    Attached Files Attached Files

  2. #2
    Advanced Tuner
    Join Date
    Dec 2019
    Location
    MS
    Posts
    566
    So you have the cam you listed the specs from?
    Cause from what i can find the Elgin cam 1840P is a 228/230 but you have 238/242 specs listed.

    You can change the Idle Underspeed/Overspeed Spark table to make the Idle bouce back and forth faster to make the idle more choppy if thats what your after.

    Also depends on the engine sizes.. Do you and him have the same size engine?

  3. #3
    Tuner in Training
    Join Date
    Oct 2017
    Posts
    41
    Try this. A/F needs to be on point it will effect the crisp choppyness Jeremiah Truck Now chop.hpt

  4. #4
    Tuner in Training
    Join Date
    May 2020
    Posts
    18
    RDF1 we do have the same motor size.
    Ttmerc i will try that tomorrow.
    thanks guys