DKM vs. KKM rotary engines

[Airthrow]

The Renesis and rx-7 13B motors are KKM. DKM motors can rev to much higher RPMs (over 25,000 according to some of the sites I have read), but to replace the 3 spark plugs requires the whole engine to be taken apart.

It seems to me that there might be some interest in a DKM powered rx-7 as a total sleeper car, not neccessarily in a production car but maybe in some sort of aftermarket? Did any cars ever come in DKM? Does a DKM have the same issues with seals as a KKM?

I'm trying to learn all I can about rotaries, thanks for any info.

[fpv_gtho]

Thats funny cause i've only ever heard of the Wankel Rotary. Do you know what KKM and DKM stand for exactly?

[Airthrow]

Yeah, since Wankel was German they stand for German words:

KKM-Kreiskolbenmotor or planetary rotation motor (PLM)
DKM-Drehkolben Maschine or single-rotation engine (SIM)

from http://www.monito.com/wankel/rce.html#KKM

So did DKM ever make it into a production car? 25,000 rpms *drool*

[fpv_gtho]

judging by what i read from that link, i think the DKM would be a better race engine