Snip

-----

I found some original information from Mazda about the earlier oil
injection systems they have used in the past. My thoughts based on this
information is that applicable oil nozzles in the intake manifold should
work for the Series 1 Renesis engine to reduce the apparent increased
wear issues. I'm assuming that the oil system worked OK for the earlier
engines.

So if I put these style of nozzles in the intake where would be the best
place to put them? I thought that the best place would be right next to
the  main primary intake port or is there a better place to put them?
Mazda used this style of system on more than one version of the 13B
engine it must have some merit.

Attached are three files of oil lubrication systems for various RX-7
engines, normally aspirated and turbo engines. It appears these versions
of the engine had a ratio of about 100:1 at about 2000 RPM, I assume
that the ratio was 300:1 or maybe higher at idle and at higher RPM/loads
the ratio would or should have been somewhat lower.

The OMP system has been around for a long time it certainly appears to
have been a reliable system. There are millions of engines out there that
have used it for decades, having a variable ratio of oil particularly
when the highest loads are present must have benefits over a fixed
amount of oil in the fuel.

I keep looking at the OMP system. If it is maintained and checked
properly, it should prove to be a reliable system. Apart from some
computer codes that appear to more from some sort of poor adjustment
there does not appear to have been any actual mechanical failures of the
OMP on RX-8's.

Regards David

This link mentioned in the 02_LUBRICATION_SYSTEM.pdf
did not work David.

http://members.xoom.com/twinturboteddy/fsm/rx7.htm

Mazda has been very stupid about the whole Oil Metering Pump
situation. It is well known that non synthetic crankcase oil is
not the best stuff to lube the apex seals yet Mazda continues to recommend
it. Synthetic oil survives much higher temperatures so it is far superior.

I can see why they have not installed a two cycle oil reservoir as it
is just another thing the customer must maintain. The smart thing
for them to do is test a  synthetic oil for the crankcase and start
recommending it. I was told by the higher up that they simply have
not tested it.

Chevrolet recommends Mobil 1. I have been using Mobil 1 in
my street rotaries with no ill effects for over a decade.

Try synthetic Idemitsu rotary engine oil Mazda and start recommending it.

For those doubters out there put a teaspoon of oil in a small can
and bake it in your oven  for 30 minutes at 500 F. Open all windows wide :)

Paul Lamar

----

Yep the link in that PDF does not work (I think it has been online for a
longtime) I got that one from one of the Mazda RX forums.

I agree about the regular engine oil and why they did it that way they
did for a car, but on an aircraft maintaining an oil reservoir should be
a non-event it should be just part of any preflight or refuel to check
the oil at the same time.
It was the location of the nozzles in the intake manifold/s that's the
reason for the attachments.
_I have one of Richard Sohns OMP adapters to inject 2-stroke oil_.  I am
not interested in using the engine oil in the OMP system that is just
not a good idea at all for aircraft use. It's the location of the
nozzles in the intake manifold that's what I'm really interested in.
I'm looking for suggestions on where the best location might be on a
13B-MSP intake manifold. My thoughts are right next to the primary
intake port on the six port engine or is there a maybe better location?
or should I look at maybe two locations say on either side of each rotor?

Regards David

----