Mark,
That thing have drag radials or something on it?
I know my M/T ET Street radials need to get really hot to hook. Once they do, look out. Took my 60 ft from a 2.20-2.30sec to a 1.71sec in a 4600 lb truck with a manual trans. It was at the point where it would bog up to about 4500 rpm launch. Before the ET streets it would blow the tires off at anything over idle. At 4500 rpm and 12 psi, it just hooks and goes with no wheelspin.