That cam gets a bad wrap due to improper useage. As you yourself has found out in the stated wrong combo of low compression, gear etc...
An entry level bracket cam is a good description. As seen by other members postings, you can get going pretty good with it.

I have noticed that my time with that and other Purple cams is that they respond well with a good dose of compression. There not ideal for the street. The old MP catolog "Speed Tips" will be accurate if not slightly in the "sandbagging" side. Best results, like all things occur at sea level. Over @ E-town, the have seen guys run a bit faster than the "tip" section said it would.

"For the street", I myself like a wider CL than the Purple cams.
I have had good results with the Purple cams at the track.