Hello, I'm a 4th year engineering student at the Rochester Institute of

Technology and am currently writing a report comparing the thermal
efficiencies of the 13B and Renesis engines. However I'm having a bit of
trouble and the people at Mazdatrix pointed me in your direction. The

main issue I'm having is trouble finding concrete numbers to use for my
calculations so I wanted to ask if you have any p-v or s-T diagrams for
the combustion cycles of either engine. I'm currently looking through

your website but have yet been able to find anything. Thank you very
much for any assistance you can give.


Joseph Rej

We don't have any of that on recent engines.
About the best we can do is tell you what BSFC
we are seeing in the higher power ratings.
We are seeing a BSFC of about .47 at a mixture ratio
around 17:1. This is about the same as the current
Lycoming aircraft engines.

That kind of info you mention, to my knowledge, has not been

published for years due to the competitive nature of the
auto biz.

I would love to  have a BSFC map of the RX8 engine if you
run across one.

Mazda claims a recent break through in BSFC for the 16X.


Also check out SuperTec Wankel in Germany.
Try to speak to Dankwart Eiremann.
He has been involved since Felix Wankel.

They claim .34 BSFC.

Paul Lamar


Thank you very much. I had begun to figure that the reason I wasn't
finding anything was that most of the information is company secrets.
But thank you for your time and information. I'm going to speak with my
professor and may end up changing my original idea to a black box
analysis and go from there.

Also two side notes, your website is very fascinating and as a rotary
lover I wanted to thank you for taking the time to put it together and
maintain it. And second I have received two additional e-mail from you
titled EC-2 and Kis Cruiser turbo installation and from the content I
assume they are meant for someone else so you may want to try resending
them.

Thank you again


Joseph Rej