The combustion chamber shape results in slower burning and higher emissions compared to modern piston engines, which necessitated careful tuning and the addition of emissions control systems in later models like the 13B-REW found in the RX-7 FD. Understanding this unique mechanism reveals why Mazda remains so obsessed with this technology despite significant challenges.
Mazda RX7 Rotary Engine Reliability and Common Issues
Performance and Driving Dynamics Driving a rotary-powered RX-7 is frequently described as a visceral experience, characterized by a scream from the engine as it climbs the rev range. The absence of reciprocating parts means the engine delivers an exceptionally smooth power delivery, free from the vibration inherent in traditional piston engines.
The FD RX-7 is frequently cited as one of the greatest sports cars ever made, praised for its handling, sound, and analog feedback. The compact physical profile allows for a lower hood line and more flexible chassis packaging, contributing to the RX-7's balanced 50/50 weight distribution.
Mazda RX7 Rotary Engine Reliability and Common Issues
Legacy and Modern Relevance The RX-7 and its rotary engine left an indelible mark on the automotive world, securing a devoted following that persists long after the model's discontinuation. The apex seals, which prevent combustion gas from leaking between the rotor and chamber walls, experience significant thermal and mechanical stress, leading to increased oil consumption and potential seal failure over high mileage.
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