Thread: 2.93 to 3.29 gear change tuning HPtuners

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  1. #21 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GrandPrix Junkie SgtMarshal's Avatar
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    I found this, maybe it will help:

    http://www.hptuners.com/forum/showth...r+ratio+change
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  2. #22 Re: 2.93 to 3.29 gear change tuning HPtuners 
    Who is this guy? SubwayGuy's Avatar
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    Hey look, you guys were discussing me long before I even got a GP .

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  3. #23 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTP Level Member Impala131's Avatar
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    Quote Originally Posted by SgtMarshal View Post
    Thanks, going through it... I think the main thing messing me up, is that there are 2 differences to account for instead of one.
    2003 Grand Prix GTP.... the journey begins again....
    E85 Self Tune with HPT, 80# Injectors, Gen V 3.4 pulley, SD Headers, AL605 Plugs
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  4. #24 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTP Level Member Impala131's Avatar
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    Figured it out... to change a 2.93 FDR PCM file to work correctly with a 3.05 FDR car, the gear ratio calc value input must be 3.42

    Calculated gear ratio table in VCM Scanner reads 1.00 in 3rd Gear

    Please add to OP for anyone else top swapping their factory 3.05 car.
    2003 Grand Prix GTP.... the journey begins again....
    E85 Self Tune with HPT, 80# Injectors, Gen V 3.4 pulley, SD Headers, AL605 Plugs
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