George Lendich wrote:

Paul,
I was at the local mazda parts supplier the other

day going through the different housings and came
across a later model 13 B ROTOR housing with a small
hole

just about the inlet manifold position - this was

a direct oil injection into the rotor seals.

My question is what year/years were this - was

there a marked benefit and has the Renesis engine
followed this injection principle.

I think that was started about 1985 or there abouts. When Mazda went to fuel
injection from carbs. Could be even earlier. I am not sure.
The RX8 engine has two oil injection ports per rotor housing near
the ends of the apex seals. The apex seals in the RX8 engine probably
run much cooler than the 500 degree F the current seals run as hot
exhaust gases do not pass by them on the way out the side exhaust ports.
Therefor it is not as important to inject the oil in the center of the rotor
housing as a major function of the oil is to cool the apex seals.
Probably less oil is now required to cool the RX8 apex seals as they
have a much easier time of it.

Paul Lamar

Is it better to have the oil-mix or this oil
injection? BOTH?! Thanks.

IMHO it lubes better if mixed with the fuel.

Paul Lamar
 
The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2004 All world wide rights reserved.