Hi, my name is Blaine. I live in Canada. My track DA is not as bad as yours....around 4000 feet DA. I have been running the vortech v3si supercharger since 2009. I liked it... but now that I re-did the engine.....only 6 psi boost with 28 tooth pully. Specs. 419 stroker, heads, cam, headers and catless exhaust. My question is...How do you like your new vortech V2 or V1 si supercharger?