Subject: [FlyRotary] Re: OMP Plumbing
Tracy,
OK, here's the rest of the story...
I have come to believe the Lancair wing fuel tank design may have been
partly responsible for the damage to my apex seals. Lancair uses a
wet wing and there are ribs forming 4 separate fuel bays per wing.
The ribs have "mouse holes" to allow fuel to pass from section to
section. Years ago, when I used to run mogas, I used a fuel trailer
and would add 2-stroke when filling. It would be well mixed by the
time I pumped it into my a/c tanks. I was forced to switch to 100LL
when the beaurocrats started blending ethanol in all auto fuels
(ethanol is non-compatible with the Jeffco adhesives). I now have to
fuel at the airport(s), so the process is to pour the 2-stroke into
the wing as I pump the fuel. This isn't easy to do and I seldom
finish pouring the oil at the same time the tank is reaching full.
Pouring oil while fueling surely helped, but in retrospect I suspect
it still didn't mix thoroughly due to the ribs in the tanks. I can't
figure a way to get the fuel thoroughly mixed, so I decided to switch
over to the OMP system.
Maybe the answer is to do both. I can run the OMP (with 3-lines) and
also add some additional 2-stroke (1/2 oz./gallon) to the wing tanks.
Not perfect, but much better than the alternative.
Mark
On 4/9/12, Tracy <
rwstracy@gmail.com> wrote:
> Hope I didn't give the impression I was an expert on the Mazda oil
injection
> system. I only remember where the 4 lines went on the 13B from
> disassembling so many of them. Only 2 of the ports (secondaries I
believe)
> got the oil lines so only 4 needed. Don't think I've ever seen a 20B
OMP
> setup (my 20B engine was built from new parts). I can't imagine why
there
> are 4 lines on a 20B setup. I think there are only 2 lines used on 3rd
gen
> 13Bs. Only the rotor housings are fed, not the manifold. Since the 20B
is
> essentially a 3rd gen engine, I would have thought it would have a
similar
> setup with 3 lines (one to each rotor housing).
>
> I'm still of the opinion that you can't do better (from a functional
> standpoint) than premixing the oil so I've never played with the
injection.
> It just isn't practical for most people in car use. That's why 95%+ of
OMP
> adapters are purchased by car guys.
>
> Tracy
>
> PS: I thought I sent that updated EC2 installation guide to you before I
> left home (I'm in Colorado until early May) The main difference from
last
> one you have is that Both A & B are programmed when running on A
controller.
> When using B, only B is affected by programming changes.
>
> Sent from my iPad
>
> On Apr 9, 2012, at 10:12 AM, Mark Steitle <
msteitle@gmail.com> wrote:
>
>> Tracy,
>>
>> How should I plumb the 4 lines for the 3-rotor. From your
>> explanation, it seems it should have 6 lines (2 per rotor)? Even the
>> 20b OMP only has 4-ports. Should I split the 4th line into three
>> separate lines? Do you know of anyplace where I could read about how
>> OMPs are connected from the factory?
>>
>> Thanks,
>> Mark
>>
>> P.S. Were you going to email me a copy of the updated EC-2 manual?
>>
>>
>> On 4/9/12, Tracy <
rwstracy@gmail.com> wrote:
>>> Two into the rotor housings, two into the intake manifold just upstream
>>> of
>>> the ports in the block.
>>>
>>> Tracy
>>>
>>> Sent from my iPad
>>>
>>> On Apr 9, 2012, at 5:42 AM, Mark Steitle <
msteitle@gmail.com> wrote:
>>>
>>>> Steve, that's why I'm asking the experts on this. I'm still trying to
>>>> figure this out. The older 13b OMP has 4 ports. So did the 20B OMP,
>>>> with
>>>> only three lines. I was planning on not using the 4th port. Where
does
>>>> the 4th line go to on the 13b setup?
>>>>