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There are basically 3 different OMPs for the RX7. First was the GEN1 OMP
with two lines going somewhere into the intake manifold. Second was the GEN2
with four lines, two going to the intake manifold, the other two going into the
rotor housing using the injector valves. Sometime in 1998 Mazda switched to
control the OMP from the ECU using a new OMP, however with four oil lines like
the previous OMP. All three pumps have a different footprint. The adapters
offered by RWS are called 12A for GEN1 OMP, 13B mechanical for GEN2 OMP, and 13B
electronic for the OMP controled by the ECU.
Obviously an ECU with OMP output is needed for the 13Belectronic OMP.
Richard
Sohn
N2071U
http://www.fairpoint.net/~res12/home.html
Sent: Monday, April 09, 2012 4:52 AM
Subject: [FlyRotary] Re: OMP Plumbing
Kelly,
I have a 13b front cover/OMP installed at present, but I also have the 20b
front cover/OMP on the shelf. I planned on using the 13b pump because it
is much lighter and simpler. They don't share the same footprint. If
you go to the RWS web site and click on the OMP adapter link, you can see the
different adapters for the corresponding engines. The big difference with
the 20b OMP is that it has 9 wires and 2 large electric gizmos (I think they're
solenoids) that were controlled by the computer. I like the simplicity of
the 13b OMP, just one lever.
Mark
On Sun, Apr 8, 2012 at 10:34 PM, Kelly Troyer <keltro@gmail.com>
wrote:
Mark, Steve,
Have to admit I had not
thought of that little problem for the 20B.............Mark did your 20B
come with a OMP ??.............I have a Cosmo 13B but have not paid any
attention to the OMP
so do not know as I type if it is like the 89-91 pump or like the 93-95
13BREW pump or if the
20B pump has a completely different mount pad than the
13B..............Mark is your current
front cover a 20B ?.................
Kelly
On Sun, Apr 8, 2012 at 8:29 PM, Steven W. Boese <SBoese@uwyo.edu> wrote:
Mark,
Since the OMP 's I've seen are set up with 4 oil lines and intended for a
two rotor engine, how do you intend to adapt it to the three rotor engine in
terms of amount of oil metered and how it is distributed?
Steve
From:
Mark Steitle
Sent: Saturday, April 07, 2012 8:10 PM
Subject: [FlyRotary] OMP
Plumbing
Is
anyone running an oil metering pump (OMP) that can help me
figure out how the lines should be connected. I'm planning
on using the Mazda banjo fittings to hook up to the OMP, but
what do I do with the check valves. Do you connect the
check valves to a vacuum source or just block them off?
Will the system work properly if I plug the check valves?
I plan on locking the lever in the full open position.
Will this work for a/c use? I'll be using Richard Sohn's
adapter with a 1 gallon reservoir filled with 2-stroke
oil.
Mark
S.
--
Kelly Troyer
Dyke
Delta_"Eventually"
13B_RD1C_EC2_EM2
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