I don't think there's parasitic loss with the turbo below 3000 rpm. There's just no big gains below 3000.

My prediction is that the stage 2 turbo (intercooled) will be competitive with RIPP below about 2500-3000 rpm, and completely blow RIPP (and Magnuson) out of the water above about 2500-3000 RPM. Stage 2 will be the fair comparison because it is intercooled like the superchargers are, and it is competitively priced against the superchargers.

The stage 1 kit (no intercooler) is $1000 less, so it's a more affordable option with opportunity to upgrade later, but still has huge gains in the upper half of the RPM range. For stage 1, I predict that it will beat the RIPP above 3000 rpm, then drop back down near RIPP's peak output at redline. Stage 1 turbo will overtake Magnuson at slightly higher RPM (probably before 3500 rpm) and significantly outperform Magnuson from there all the way to redline.

According to Prodigy's dyno results, the stage 1 turbo produces over 300 ft-lbs torque from 4000 to just under 5500 rpm. That's HUGE! JeepLab's results show RIPP peaking at 280 and Magnuson at 254. Of course, Prodigy used a different dyno, so who knows how valid it is to compare them.

Again, these are just my personal predictions based on publicly available info about all these systems. All I can say for sure is that the turbo is fun and makes me smile, and hasn't given me any reason to wish I would have gone another route. I have not driven a jeep with any other forced induction system, so I cannot compare them based on any personal experience.

Nothing is certain until we get dyno results from all these systems on the same dyno. Hurry up JeepLab! You need to get a local volunteer to try the STS turbo and the ProCharger supercharger now!

Anyway, let's end the derailment of this thread. Head over here to continue any turbo-specific discussion: http://jeeplab.com/showthread.php?13...bo-DIY-Install