FULL NA & WHIPPLE BOOSTED RESULTS, LS9 VS COMP, NA VS BTR. PLUS, AS ALWAYS, WE ADD MORE BOOST FROM THE WHIPPLE SUPERCHARGER! CHECK OUT PART 1 OF THIS VIDEO DETAILING THE FIRST MODS WE MADE TO A GM PERFORMANCE B15 LSX CRATE MOTOR. THE B15 STOOD FOR 15 PSI, BUT WE TOOK IT WAY PAST THAT! HOW FAR YOU ASK? HOW DOES 23 PSI SOUND?