Any good reason you wanna stick with the stock tune. 30 and 60 both would be good tow tunes. With true stock tuning from the factory I'm saying, the VGT is closed up like that in the 90% range. You just don't hear the whistle because of all the emissions. I think you're mistaken about seeing VGT near zero with a whistle tune, cuz whistle tunes close the VGT and they'd be in 90% range as I said with a,whistle tune. So my advise is try the 30 or 60 hp tune. Set your spool to mild, 23 timing, and 1850 rail pressure. Maybe running the stock with delete tune is the problem. I agree there shouldn't be a problem with that, but maybe try another setting, cuz like I said a true stock tune has the VGT closed up like that. Other than that for sure look into warp with Ray and custom tunes will get you happy for sure.
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