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On IMSA’s sliding weight vs. engine displacement scale, the Mazda 4-rotor came in at 1,750 lb (790 kg) and many teams had cause for concern about this, thinking that the Mazda engine had been gifted a power-to-weight ratio advantage. While the RX-792P showed occasional turns of speed, the reality was that the engine simply was giving up far ...
MADBUL, a Mazda FD RX-7 with a 26B quad rotor, naturally aspirated engine. MADBUL was given a new look in 2017 to have RX-3 front end bodywork and renamed MADBUL 7.3 due its design combination of RX-7 and RX-3; BADBUL, a Mazda RX-8 with a 20B three rotor turbo engine; HUMBUL, a Mazda FD RX-7 with a 26B quad rotor, twin turbo engine
Mazda RX-7 Spirit R Instrument panel of RX-7 Spirit R Easily the most collectible of all the RX-7s was the last model limited to 1,500 units. Dubbed the " Spirit R ", they combined all the extra features Mazda had used on previous limited-run specials with new exclusive features like cross-drilled brake rotors.
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It was then used from 1985 to 1992 in the RX-7 FC, in Naturally Aspirated or Turbocharged options, then once again in the RX-7 FD in a twin turbocharged form from 1992. It disappeared from the US market again in 1995, when the last US-spec RX-7s were sold. The engine was continually used in Japan from 1972's Mazda Luce/RX-4 through 2002's RX-7.
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The engine continued to be used in the GTS category for the spaceframe FD3S RX-7, which returned to Le Mans in 1994, backed by Mazdaspeed. The livery returned again, in 1995, in Jim Downing 's rotary-powered Kudzu DG-1 , which competed in IMSA's WSC (World Sport Car), a category with different regulations than the FIA.
The RX-7 was a direct replacement for the RX-3 (both were sold in Japan as the Savanna) and subsequently replaced all other Mazda rotary cars with the exception of the Cosmo. The original RX-7 was a true sports coupé design, as opposed to a sports car like the Triumph TR6 or a sedan with sporting intentions.