i have a 2004 gto A4, LS1, with a mti g1 cam (228/232 .588/575 113) ,homemade intake using 2002 corvette tube to get the filter in the front of the radiater, long tube headers, 3" exhaust no cats and dumped at the IRS. i have spent the past two weeks tuning but im lost. where should i go from here?