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    Give this a thought on advancing timing

    In the new GMHTP magazine there was a 350 T/A that had advanced the timing 12* and upped the fuel to 51 base lbs and changed back to the stock chip to go from like 14.00 quarter to 13.6 quarter. Previous owner seems to have done this to my truck as my timing was advanced 11-12* and fuel was set...
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    How to tune a mostly stock truck

    only mods I'm running are a external fuel pump, fuel regulator, 3"ATR exhaust w/ HF cat. It has a new tune up using the stock plugs and the fluids have been changed. I am running 45lbs BFP and am not overboosting but I still get up to 11* KR. What the F? I am also getting puffs of black smoke at...
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