auzoom

Didnt see this response initially. I understood the first part, that while we have the new EMOPs, they are controlled in the same old way, ie depending on the load and throttle position determines the amount of oil metered. With the second part, are you saying that the only other differences are the actual pumps themselves, ie SI = Brand X (which just happens to be mechanical) and SII Brand Y (Which just happens to be Electric).

Also, why would they go for 2 pumps instead of one? They are downsizing on the injectors...maybe to pay for the extra MOP

Cheers

Andrew

PotatoSoup

OK, so I'm clearly not an expert on rotaries, but in regard to the 2 EMOPs, maybe Mazda have been doing some studying and analysis of the RENESIS over the years and have noticed that the two rotors/housings exhibit some differences in wear or heat issues over time.

By having an individual EMOP for each rotor/housing, maybe they can account for differences between the two (dynamically, precisely tailoring oil flow across all 6 injectors) that may not be possible with one pump?

By that I mean, for example, maybe for some particular load/throttle combinations, the rear rotor is being metered, say, 4% more oil than the front rotor.


Also, hooray for this thread + sticky!

auzoom

Thats what I would have figured, but based on MM's post about this, I would have assumed that in order to meter the pumps independantly you would have 2 seperate tables which they dont.

Also, SII only has 4 injectors

Cheers

Andrew

PotatoSoup

Yes, 4 fuel injectors and 6 oil injectors, if that's what you mean.

MazdaManiac

iTrader: (3)

Has anyone verified that it is actually two physical MOPs?
I haven't. I only know about the PCM end of it.

Easy_E1

iTrader: (2)

You didn't see this from earlier in the thread,,,? Courtesy of Ash8

MazdaManiac

iTrader: (3)

Erick - I sincerely want to thank you for that excellent technical contribution.
Unfortunately, I was not aware of that particular technical drawing or its presentation here on this forum.

I consider this elucidation of the subject to be most welcome and the clarification of the matter is, in my view, absolute in light of this particular bit of added information.

Easy_E1

iTrader: (2)

When he says it like that I don't know whether he's being sincere or sarcastic. It's the exclamation point at the end.

MazdaManiac

iTrader: (3)

Lol.

Edited.

Easy_E1

iTrader: (2)

Your very welcome Jeff. I don't know how you could have overlooked this bit of information. But it's always a pleasure to help out a fellow die hard like my self.

I just about spit my drink all over my keyboard with that comment.


Anyway if you need help with anything else Jeff, don't hesitate to ask.

swoope

iTrader: (5)

going to go with both for a thousand alex!

beers

auzoom

Doh!

Easy_E1

iTrader: (2)

According to the above diagram,, the two OMP's appear to share a common union. Seems they both rely on the same oil source.
I find it funny that I can only find 4 outlets for the oil injectors on the pumps. Where are the injection lines for the other two.?
I know Mazda loves these vague pics but is there another pic with the injection lines in relation to the pumps?

MazdaManiac

iTrader: (3)

I don't have time to read everything - I count on the concise synopsis of people like Easy!

ASH8

METERING OIL PUMP RESISTANCE INSPECTION.

1. Disconnect the metering oil pump No1 and No2 connectors (2 terminals).
2. Measure the resistance between terminals A-B using a Tester.

* If not within the specification, replace the metering oil pump.

Metering Oil Pump No1 and No2 standard resistance.
3.6 - 4.1 OHMS ( Temp 20 oC / 68 oF)

Source: 2009 RX-8 WS Manual.

I have not checked the Parts Manual, but it appears if the EMOP's are defective you renew the complete unit as there are no serviceable components.

auzoom

Is it possible that the outer injectors share an outlet hose?

Easy_E1

iTrader: (2)

Thank you, thank you,,, thank you very much

Takes a bow..

Easy_E1

iTrader: (2)

It should show up as an intermediate connector in the pic,, some where I would think.

I would like to see,, "01-11-14 Hose removal note".

MazdaManiac

iTrader: (3)

If you look very carefully at the right pump on that diagram, it shows two outlets.
They just didn't want to show double banjo fittings on that diagram, so they used a split line to designate two identical connections.
Compare this to the left pump.

Easy_E1

iTrader: (2)

I see now says the blind man. Thanks Jeff. We're doing good here tonight.
Where would they be with out us?

ASH8

Here is the only other Diagram I can find of the EMOP and the Oil Tubes (as Mazda call them), the rest you have already seen, the manual does not show the Oil Tubes on their own or in a completed series or circuit.

I am sure the Parts Manual would show in more detail.

There is a supply hose that goes from one EMOP to the OCV (No. 10) Oil Control Valve, located by the Water Pump/ Front Timing Cover.

MazdaManiac

iTrader: (3)

I dunno. Take a look at the pile-up in the Pettit threads, I guess.

Easy_E1

iTrader: (2)

I get most of my info from the parts dept on computer. Manuals are great but if you want detailed pics,, you hope. Then the parts descriptions are a must have.

Nope.

ASH8

As shown on page 2 of this thread...unfortunately there are no other complete pics of the Oil Tubes in the WS Manual.

The Hose Removal Clamp/Fitting is related to the hose interconnection of the two EMOP's, sorry I just cant find any more diagrams for you.

Easy_E1

iTrader: (2)

Thanks for what you have posted up. I'm sure everyone appreciates it as much as I do.