2013 GMC EXT CAB 6.2 1/8 times tonight
#34
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Join Date: Nov 2005
Location: Eugene, Oregon
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Before you drop all the money on the headers or gears try an underdrive pulley...I expect that to get you in the 8s. I went from an average of 14.45 @ 98.1 (2 runs) to 14.05 @ 100.7 (2 runs) with just an underdrive pulley installation . Keep in mind that these are per my old g-tech meter and were in 4wd to negate wheel spin. My other mods at the time were diablosport 92 tune, MIT/Filter, & ported throttle body, but the installation of the UDP was the only difference between the runs. I now have a BB tune and am not running the ported tb any more since I'm not convinced that it did anything other than require more fuel.
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Ok guy's finally got some good air and the truck went 8.98 at 79.95 with some tire spin,was going to make another pass but the track was packed,if I don't put it up for sale going to do some other bolt ons headers etc but I think there's still some left like it is just by playing with the tune will see.THANKS