Thread: just got my hp tuner...questions!!!!

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  1. #1 Re: just got my hp tuner...questions!!!! 
    SS-DD Level Member IndeedSS's Avatar
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    Special VCM Controls

    Cylinder Balance: The cylinder balance test calculates % of efficiency using current RPM. RPM is gauged with all injectors running normally. Injectors are then cut 1 cylinder at a time and the new RPM is compared to the pre-test RPM to determine % of efficiency. To use this test the main scanner must be stopped. You must also control the IAC steps as well for consistency.

    Cylinder Balance Test - How-To

    Bring the engine up to full operating temp (at least 180*)

    Open the Scanner

    Sectect VCM Controls and then Special

    The scanner need to be connected but stopped and no log file opened.

    Set the IAC to around 800 to 900 RPMs

    Set the IAC steps to 60

    Click Begin



    Idle (IAC) Control RPM: Force a desired idle RPM.
    Idle (IAC) Control Steps: Force the IAC motor to this position. This control is also used for the cylinder balance test.

    CASE Learn: To use the CASE learn function please follow these steps:
    Put the vehicle into park (auto) or neutral (manual).
    Turn off all accessories and A/C.
    Apply the parking brake.
    Press the brake pedal. Keep the brake pedal depressed during the entire procedure.
    Press Begin.
    Gradually rev the vehicle to fuel cutoff (around 4000-5000 RPM's) over a period of about 4 seconds. When fuel cuts out, immediately release the throttle.
    Allow the engine to come back to an idle.
    Turn the ignition off for at least 15 seconds. This step is required for the VCM to store the newly learned configuration.
    Last edited by IndeedSS; 02-26-2008 at 08:43 PM.
    04 Indy SS build #972 - Traded
    2010 Camaro SS LS3
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  2. #2 Re: just got my hp tuner...questions!!!! 
    SS-DD Level Member IndeedSS's Avatar
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    just some quick reading generalized

    Tuning Tips
    04 Indy SS build #972 - Traded
    2010 Camaro SS LS3
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  3. #3 Re: just got my hp tuner...questions!!!! 
    TDCRacing
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    cool thanks for all the info and help....hey can u explain a cylinder ballance test in some other words maybe?? like for ppl that dont know what the hell there doing yet?? What is its purpose? lol sorry...and does anybody know about the map conversion to boost psi that was discussed above by any chance?
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  4. #4 Re: just got my hp tuner...questions!!!! 
    SS-DD Level Member IndeedSS's Avatar
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    Not sure I can say much more than described.

    It is just a tool, and a very basic one at that. Since it cuts one cylinder out of the picture at a time, it allows you to see if there is a problem with that cylinder. All of the percentages should be within 3% of each other iirc. It's just fun to watch and feel the control over the engine. If one percentage is way off though, you will have to figure out what the problem is.

    I believe my cylinders, when tested, were all around 93%.

    As far as the brackets in the boost conversion, I believe the answer is yes, from other custom PID's I've seen. Try it out and let us know. If it doesn't work then it's not going to hurt anything.
    04 Indy SS build #972 - Traded
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