why would i put something back on thats going to shorten the life of my motor? conventional motor oil isnt designed to burn it creates a carbon build up. plus, if the omp fails you have no way of knowing it until its to late. If your thinking my motor is stock it's not.

 

I just sold my 2007 Mazdspeed3 GT (so I could have the cash to rebuild my Miata) so I had to give a ride in the (ugh) FC last night. It's pretty rough around the edges so when we got in the car I gave a pre-emptive warning.

"Don't touch the carpet on the doors, it smells bad. That window doesn't work. It smells like gas because it's a rotary and they are awful."

 

Not to mention, the idea of putting oil from the oil pan into the combustion chamber just sounds like a bad idea...

 

they sell a kit that lets the pump draw 2 stroke from a canister

 

who, and where?

 

x2

 

http://www.rotaryaviation.com/oil_in...p_adaptors.htm

 

yea that thing^

thanks for posting it

 

thanks, never knew about that.

haven't owned my rx7 long enough to get that far into things though...still doing as much maintenance as i can.

i like the idea though, bookmarked for later research.

 

bookmarked too. that is a tempting next mod

 

Hmm, nifty.

 

i will be buying that.

 

I don't know if this thread is the place for this, but....

Using oil from the crankcase seems fine as far as Mazda is concerned since all their production rotary engines have used this system.

There are plenty of rotary engines out there, the majority of them in fact, that run into the hundreds of thousands of miles without the "benefit" of premix.

There is only anecdotal evidence the premix is better. Some people report less carbon buildup, but we have to remember that those rotary owners who are tended toward premix are far more likely to be driving in ways that don't promote carbon buildup in the first place. And keep in mind that most of the carbon buildup you see in a rotary (or any engine) is due to burning a hydrocarbon fuel. We have a bit more of annoyance with it in the rotary due to our long combustion chamber though.

The only way that premix would be of a benefit to you (that is, if it truly is better) is if your engine was built with new housings, irons and rotors. Otherwise there is no point as those parts have already run for quite a few miles with the metering oil pump.

And there is the question as to whether premix actually is better. No one has proved that it is, and for good reason. It is massively expensive to set up a proper double-blind study using test engines that are all built from new parts and torn down at regular intervals. Keeping them in controlled conditions and running them on engine dynos for wear tests is a multi-million dollar initiative.

If your metering oil pump has failed, it would only be a short matter of time before you notice less oil consumption (as you do check your oil at ever fillup, right?). In addition, metering oil pumps flat out do not fail. What fails are the lines (easy to spot due to oil leaking) and nozzles (a lot harder to spot).

To throw some more fuel on the fire, the metering oil system is just as likely to fail using that adapter as drawing oil from the crankcase.

 

fight! jk nice info though not the right place but makes me wonder about those other pumps.

 

I'm sure this isn't the place for it but, in the words of Aaron, More Fuel on the Fire.

My motor is built with new internals. I saw NO carbon build up what so ever the one time my motor came apart. I do use water/meth tho.

The main flaw I see in premix is that the oil/premix is sprayed with the fuel, in the intake stroke. Then burns off in the combustion stoke and exits the motor with the exhaust. It seems to me that the motor is then left with the least amount of lubrication at one of the hottest points. So as the rotor makes its way back to the intake stroke and cools off, there is the least lubrication...

I would think to have two separate injectors lubricating just before the intake stoke would be the best of all worlds...

 

I guess that parts of this thread have already gone well off topic anyway, so...

How long it it run before it was torn apart? Less then 10K isn't enough time to show really any carbon. And of water/meth cleans the engine a lot.

The housings are coated in porous chrome which is designed to capture and hold oil, so I suspect both systems provide enough lubrication. Neither two stroke oil nor crankcase oil was really designed to lubricate a set of apex seals under those conditions so I doubt that either one is ideal. Which is certainly one of the reasons that most engines show scratching and wear around the exhaust ports and chrome surface in the bottom part of the housing.

Mazda did include a sort of "dual" metering oil system with the 2nd gen. Two nozzles spray into the intake stream, two directly onto the apex seals.

 

I wouldnt be too worried about buying a part made for airplanes/aerospace. I do inspection, sometimes on parts for airplanes, and let me tell you EVERY part goes through some kind of annual tests of sorts. I assume they have to go through some vigorous testing to be put on aircraft, maybe not private planes, but definitely any passenger planes and such. So I'd trust that piece to not fail.

Off topic: You know what they do with Cessna's that have flaws (i.e. cracks in the wing struts, etc)? Fold them up and ship them to Mexico. True stuff there.

 

yall wont believe wat happend today. this honda guy told me with a serious face that honda made the frist rotary ever. i hella started laughing in his face. lol he felt hella stupid

 

 

Not really anything funny but I had a guy in a nissan truck and sunglasses give me a peace sign, then I saw another 7 and pulled over and talked to him, and then an older mexican guy drove up and asked if I needed any body work done.. lol

 

That is a "hella" lame way to speak, and type English.

 

hella is a west coast thing. I learned that later in life. Not sure why we say it, not sure you ever heard it before

 

^ cause you're all beach bums! haha jk.

when ever i get pulled over (which, amazingly, isn't very often *knock on wood*) the cops trip out because my car is RHD... but i thankfully haven't gotten any more "look it's a skyline!~" comments...

 

Hella meens HELL OF... We was sayin that in grade school over 20 years ago!!! I.E. That 7 hella nice!!! It's a west coast way of speakin quiccly, Like short hand speech LOL!!! WHAT UP EVIL WANKLE HOW IS CHUCC NORRIS LOL!!! RoXy got washed in the rain today LOL!!!
ONE MUTT

 

1) Hella was not a cool thing to say when it first started being said, and it is definitely not now.

2) Saying hella is liable to get you disgusted looks and smacks to the head.