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The 13B-RE from the JC Cosmo series was a similar motor to the 13B-REW but had a few key differences, namely it being endowed with the largest side ports of any later model rotary engine. Injector sizes = 550 cc (34 cu in) PRI + SEC.
In 1981, Pierre Honegger rebuilt a production Mazda RX-7 for use in the GTX category of the IMSA GT Championship.The new car was named the Mazda RX-7 GTP, and featured new, wide-body bodywork, whilst using a more powerful version of the Mazda 13B Wankel rotary engine used in the road car. [1]
The Wankel engine is a type of rotary piston engine and exists in two primary forms, the Drehkolbenmotor (DKM, "rotary piston engine"), designed by Felix Wankel (see Figure 2.) and the Kreiskolbenmotor (KKM, "circuitous piston engine"), designed by Hanns-Dieter Paschke [2] (see Figure 3.), of which only the latter has left the prototype stage ...
Although Mazda is well known for their Wankel "rotary" engines, the company has been manufacturing piston engines since the earliest years of the Toyo Kogyo company. Early on, they produced overhead camshaft, aluminum blocks, and an innovative block containing both the engine and transmission in one unit.
Mazda America used the Mazda Cosmo name and offered it from 1976 through 1978, fitted with the 13B rotary engine. [6] In the United States, the Cosmo was replaced by the smaller, lighter, and sportier Mazda RX-7. Due to its poor sales as an export, the Series II version, built from 1979, was not exported and remained a Japanese domestic sale only.
This was powered by the 13B rotary engine, offered in naturally aspirated or turbocharged forms. The third-generation RX-7, sometimes referred to as the FD, was offered a 2+2-seater coupé with a limited run of a two-seater option. Some markets were only available as a two-seater. It featured a sequentially turbocharged 13B REW engine.