it seems like everyone one wants to use some standalone setup but that means i get to mix oil with my gas all the damn time. Can i swap into my FC and say, aviod this? I am in now why wanting to premix a damn thing.

 

Why?
Pre-mixing is superior to injecting crankcase engine oil into the engine.

I think the Haltech E11 can still control the stock 20B electronic oil injection pump...


-Ted

 

I know motec can. They are kinda pricey though.

-Destin

 

can you use an FC manual omp?

 

No.
The 13B OMP's are only designed to handle 4 channels of oil injection.
Even if you do split it out for all 3 rotors, the OMP's are design for metering specific amounts of oil per oil injection channel.

That, and it doesn't bolt onto the front cover for the 20B.


-Ted

 

What Ted said....the E11 can do it.

 

Hi, Ted. Not being argumentative, just looking for clarification.

A few years ago, the Hitman (from Australia) wrote to me that the S4 front cover with mechanical OMP could be used on a 20B. By the time I got the info, though, Peter Farrell had already re-built and installed the motor. I filed the information away, in case I had to do a re-build down the road.

Hitman seems to be very knowledgable, so why do we have two differing opinions?

 

First question. What is the pre-mix formula?

Second, why are people getting rid of the oil pump? I'm not familiar with this idea and would like to know a little about this. If you eliminate the oil pump what effect does that have on the engine's ability to pull oil from the oil pan?

 

I use 25 ml of 2-stroke oil for each 1 gal of gasoline.

I think your confusing the OMP (Oil Metering Pump) with the engine oil pump. You still have and need the engine oil pump.

 

Ahhhhh! Haynes calls it a Metering Oil Pump. I really didn't think people were removing that.

FYI, I'm not really this stupid. But small items like this one loose me. And plus I bought my Rx7 with a blown NA motor. I haven't started tearing it apart yet so I don't know all the fun little parts and what they do yet.

 

That's odd.

Personally, I wouldn't think the mechanical OMP would provide adequate oil injection for a 20B.
There's an SAE paper which shows Mazda did a lot of R&D on the minimum required amount of oil that needs to be injected to prevent premature wear.

Now the question is...
Are the oil injectors the restriction or is the OMP the restriction?
If the oil injectors are the restriction, then yes, PFS is right.
If the oil metering pump is the restriction, then it's asking for disaster waiting to happen.
I'm assuming Mazda didn't call the unit an oil *metering* pump for nothing.

I don't like injecting engine oil into the motor, and I highly recommend pre-mixing to everyone.


-Ted

 

Yes, the S4 NA front cover fits if you grind down a very small amount of material off a portion of the edge of the cover. The S4 TII front cover doesn't fit.

 

Thanks. At least we know it's doable. RETed raises a valid question about whether or not it's desirable.

At some point, I want to add one of the kits developed by the rotary aircraft folks. Carrying, measuring and adding oil at every fill-up is a minor PITA, so I'd like to be able to fill a reservoir at home and let the mechanicals do the measuring and adding. It's on my "when I get around to it" list, which is a much lower priority than my "I gotta do this" list.