Ted said that there is a kit to convert the OMP to inject 2stroke oil. he also mentioned that someone found a flaw in the design....copeander i think???

Justin

 

bump

 

Here's the site: http://www.rotaryaviation.com/oil_in...p_adaptors.htm

The flaws I can see are that the stock injectors don't inject oil all the way to the edges of the rotor housings

 

I tried to post a reply here a couple of days ago, but the server was too busy to let it go through.

I had the adapter on my rex. The problem is that the adapter is NOT a pump. It is merely a well machined device that performs three functions. It first blocks the flow of pressurized engine oil to the OMP. Secondly it allows the introduction of oil to the OMP via a hose barb. Thirdly it extends the OMP drive shaft so the OMP will still turn.

The problem is the necessity of having whatever oil reservoir you use mounted at least six inches higher that the OMP. This mounting then allows gravity to continue the flow of oil from the remote reservoir to go through the OMP into the engine when it is not running.

Since the draining by gravity would empty my reservoir in a couple of days I ended up using a plastic vacuum operated purge valve from a Chevy truck to shut the oil flow off when the engine wasn't running. This worked well but there was no way to make certain the valve was working like it should. Failure of this valve would ruin my 2,200 dollar overhaul. Also there is not enough room in the engine compartment to mount a large enough reservoir if you want to keep the cruise control.

Since the original engine lasted for 124K miles with the stock setup and this represents 10 years of driving for me, I figured the benefits of having two stroke oil were outweighed by the drawbacks of using it. I went back to the stock system.

 

thanks, i think ill satay away from the conversion

 

Was the oil draining into the combustion chamber, or into the crankcase (or whatever you want to call it on a rotary)? Maybe the use of and electric solenoid would work better than the purge valve. I don't think that we should throw this away so quickly; with a good reservoir setup and solenoid I think it would work very well. This would reduce the carbon build-up in the combustion chambers, and two-stroke oil is meant to burn and lubricate unlike conventional oil.

 

Mazdarules;
I do not dispute the fact that two stroke oil is better than the conventional method Mazda uses. What I was trying to say was the following;

First, the oil was draining into the engine via the oil injectors by gravity. This is because the adapter requires mounting the oil reservoir at least six inches higher than the OMP. This height also is higher than the injectors. Therefore oil flows by gravity into the engine via the injectors.

Using a solenoid is a workable idea, but therein remains the problem of introducing another mechanical device that can fail. This failure will ruin your engine.

The point I was trying to make was that the Mazda stock oil injection system, despite its drawbacks, will faithfully, reliably lubricate my engine. To be sure it will cause carbon to build up on the seals. This build up ruined the original engine, after the amazingly short period of 14 years and 124,000 miles of driving. I have never kept a vehicle that long, so if the engine will last only 10 more years then I will long have received the benefit of my overhaul and the subsequent use of the car.

 

it is kinda of a hassle to add 2-stroke oil at every fillup, but its not that bad. I bought a neeto narrow funnel that fits nicely in the fuel filler, now it doesnt make a big-ol mess.

 

When my friend took his 89NA to a local rotary shop the mech suspected that his electric OMP is failing. I told him not to replace it and just run PREMIX instead. Since he has an 89NA as far as i know he cannot delete the OMP that easily. I told him to just keep the OMP and just sacrifice a minute or two to run PREMIX. What brand do you recommend?

 

fix the OMP.