V8 Aggie

In one of my last posts I talked about pinging in the 4k + RPM range after I installed my XCAL-2.

I talked to Brent, we set back the timing 3 degrees and all was good.

But at any gear, at the speed of 25 to 28 MPH I get a very loud noise. It is almost as if my subs are going off. It is obviouly my exhaust but I don't know why the tune did that. At least I think it was the tune.

Thanks

I hope I described that well enough