Stupid/Funny/Random things said about the FC
06-21-09, 02:56 PM
#1251
Senior Member
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. 
06-21-09, 03:51 PM
#1252
BRAP
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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."
"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."
06-21-09, 04:27 PM
#1253
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.
Not to mention, the idea of putting oil from the oil pan into the combustion chamber just sounds like a bad idea...
06-22-09, 11:11 AM
#1262
Senior Member
06-23-09, 09:37 AM
#1263
Engine, Not Motor
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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.
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.
Last edited by Aaron Cake; 06-23-09 at 09:41 AM.
06-23-09, 11:56 AM
#1265
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.
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...
06-23-09, 01:28 PM
#1266
Engine, Not Motor
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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.
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 would think to have two separate injectors lubricating just before the intake stoke would be the best of all worlds...
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.
06-23-09, 05:19 PM
#1267
Knucklehead
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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.
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.
06-23-09, 06:12 PM
#1269
Banned. I got OWNED!!!
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06-23-09, 06:36 PM
#1270
1988 Mazda RX-7 SE
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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
06-23-09, 10:51 PM
#1273
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^ 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...
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...
06-24-09, 09:00 PM
#1274
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
ONE MUTT
