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The only free ride is supercharging by an exhaust driven system or (typo edit) a belt driven pump. You get your power and at whatever RPM you want it at.

Kevin
Ok, I should have seen that. The reason i asked is that someone i was talking to at an automotive show claimed that Nissan was experimenting with a combination positive displacement/tubocharger system. As this did not make a whole lot of sense to me,i have been looking for information,to see if it actually exists and how it functions.

TommyM
Cold fusion will never work in a hot engine. <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/smile.gif" alt="" />

Over the hill but still climbing.
88 Montero 2.6L auto, manual hubs, cooling fan conversion gps,recurved distributor,LSD Diff.