Thread: Detop swapping the GS???

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  1. #1 Re: Detop swapping the GS??? 
    GTX Level Member Andrew_99GTP's Avatar
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    Isn't the lower compression in the shape of the heads? Also where do you get a 4.2" pulley? If you are talking a SS kit my GS came s/c'd from the factory.
    Red 2dr 99 GTP"Old" Z7 t66, A/A IC'd, Custom Heads, 65# Inj, ST2 Cam, Meziere Elec Pump, JP Double Roller(with machined crank gear), Plogs, PLX W/B, Powrtuner SOLD

    "New" 2007 Duramax ccsb with a few mods
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  2. #2 Re: Detop swapping the GS??? 
    TDCRacing
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    you got a tuner right? After reading some on hpt and talking with brian...I added a whole bunch of timing into the cruise cells of the low and high octane tables... i went from getting 18mpg at best in the city to 22...and 19mpg at best on the highway to 31-32. I am pushing 45* of timing advance in the cruise cells and that is what is netting me this gain. If you have hpt or think my table will help you lemme know and i will send ya a copy.All of this is with the mods in my sig...if you have less your gain may be more
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