my bad, i was referring to the mazda 787bs rotary vs LS7 racing edition
Okay, here is the difference, though, that DOES make the LS-7 quite remarkable to it's R26B competitor:
The most prominent 4-rotor engine from Mazda was used exclusively for various Mazda-built GT cars (including the 767 and 787B) in replacement of the older 13J. In 1991 this engine in a 787B became the first from outside the U.S. or Western Europe and the first (and so far only) car with a rotary engine to win outright the 24 hours of Le Mans race. It displaced 2622 cc and built 700 hp (522 kW) at 9000 rpm. The engine design originates as a single 13B with: an additional rotor and housing added at each end, continually variable geometry intakes, and an additional (third) spark plug per rotor. The R26B's rotor housing can be purchased at retail from Mazdaspeed, but no internal parts are available to the general public.
The engine wasn't even available to the public in detuned form. As for what I've seen, an R26B hasn't ever powered a passenger car. Not even it's rotor case. The LS-7, however, shares alot of parts' with the ZO6-'Vette motor.
BTW, I'm a Ford/kinda Dodge guy. I hate like hell to admit that GM has a superior product, but the chevy/GM LS series' motors, for their price, are very hard to beat.
