Mine With The Overdrive , Was Running Really Strong At 19 To 20 Of Boost On Just 93 Sunoco, All I Had To Do Was Take Timing Out Of 1st N 2nd 1.1 Degrees No Ping No Knock , Now Going With A Built Th350 With New Chip Should Be Able To Run 20 21 On 93 With My Buildup No Problem .