Oh, the RX-7s are known for that. Even the turbos without overlap will go momentarily rich on deceleration (especially when using a open-air blow off valve, with the stock air meter). The rotary engine's exhaust is so hot it has no trouble igniting when it reaches the oxygen-rich atmosphere.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris