Solution to pre-mix
I saw a direct tip oiling system on the HURLEY ROTARY site , has any one tried this mod . ? ,I am rebuilding now and i'am concidering going this way .
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It's an interesting idea, but you're still trying to burn engine motor oil inside the cumbustion chamber...
This might cause a problem as carbon will now be concentrated in and around the apex seal and apex seal spring(s). -Ted |
Yeah I've seen those rotors as well and was wondering...the other solution is the mechanical pump designed for use on rotary-powered airplanes. I do not have the link at the moment, but essentially it replaces your existing OMP with their setup which feeds off of a remote resovoir. Previously, there was extra work required in order to mount it on a 13B. They now apparently have the adapters. One could just run synthetic two-stroke this way and eliminate the stock OMP. Thoughts, potential problems other than forgetting to fill the tank? :-)
Michel |
Originally posted by rx7tt95 Yeah I've seen those rotors as well and was wondering...the other solution is the mechanical pump designed for use on rotary-powered airplanes. I do not have the link at the moment, but essentially it replaces your existing OMP with their setup which feeds off of a remote resovoir. Previously, there was extra work required in order to mount it on a 13B. They now apparently have the adapters. One could just run synthetic two-stroke this way and eliminate the stock OMP. Thoughts, potential problems other than forgetting to fill the tank? :-) Michel |
Here's a solution - always keep a funnel and a supply of 2-cycle oil in the car at all times.
When you fill up, put a bottle of 2-cycle oil in before you put the fuel in. I do not see how this is incredibly difficult... |
Originally posted by peejay Here's a solution - always keep a funnel and a supply of 2-cycle oil in the car at all times. When you fill up, put a bottle of 2-cycle oil in before you put the fuel in. I do not see how this is incredibly difficult... |
This isn't just about the time it takes , although I absolutely hate it (lazy ??) , but on the HURLEY site they also say that 99% of the premix is burnt without lubricating anything , the modification is recomended for modified high performance turbo engines and would cause the seals to seal better and last longer . Would carbon build up be a concern if I use synthetic oil and my water injection system ? , also I owned a TURBO 11 with the mechanical OMP injecting engine oil , I opened the engine after about two years and there was absolutely NO carbon !!, so what gives ?.
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Originally posted by Marcel Burkett This isn't just about the time it takes , although I absolutely hate it (lazy ??) , but on the HURLEY site they also say that 99% of the premix is burnt without lubricating anything , http://www.nmma.org/certification/pr...dex.asp?bhcp=1 Would carbon build up be a concern if I use synthetic oil and my water injection system ? , also I owned a TURBO 11 with the mechanical OMP injecting engine oil , I opened the engine after about two years and there was absolutely NO carbon !!, so what gives ?. I've got a pre-mix FAQ on my site: http://fc3s-pro.com/TECH/FAQ/premix.htm -Ted |
Quick question about premix. I know its supposed to burn clean, but why do a lot of the 2 stroke vehicles (jetskis, dirtbikes, etc.) look like they have really bad emissions? Also would it be more advantageous to use premix with the OMP at lower proportions so that you have both methods of lubrication, or to just block of the omp and use purely premix at higher concentrations. What are the pros and cons of both using premix w/ omp and using premix exclusively.
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2 strokes motors have bad emissions because of engine design. It has nothing to do with the 2 stroke oil.
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2-strokes are even worse than peripheral port rotaries in that the intake and exhaust ports open and close at the same time. Also, the oil is premixed at a much richer ratio than a rotary would use. (I think 1:10 instead of 1:100-1:150)
I play with 2-strokes every now and then and every time I work on 'em I come away amazed that the things even run :) As for 99% burning instead of lubricating... Yes. That's why we premix as much as we do. Even the oil that the OMP injects will mostly burn off before it lubricates. That is why it is imperative that the lubricating oil be designed to burn cleanly. 2-cycle oil is designed to burn, motor oil is not. |
Every thing burns if the temperature is high enough , ih its soo bad then why did MAZDA use tha system instead of a separate two stroke oil injection system? .
HURLEY uses the direct oiling on a 8 second drag bike makind lots of power , so I think something has to be good about the mod!. What about the piston counterparts ? , dont they employ a splash lubrication system for inside the cylinders ? , so why isnt the burning of oil such a big deal , because I know that some of the oil is consumed and the rest removedby the oil ring. |
I havent heard of any piston engine designed to inject oil inot the combustion chambers, but i have heard of them squirting oil on the underside of the piston to cool it. Most people would not by a new car that they had to keep a seperate container full of oil. And i'm not sure if 2 cycle oil would pass emissions, when i used it on my car i couldnt smell anything different but my noise is not a smog machine.
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I never said anything about a piston engine squirting oil into the combustion chambers , what I said was , the cylinder walls are lubricated by a splash type method caused by the crankshaft and conn. rods moving around cacsind windage and turbulance.
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Originally posted by Marcel Burkett Every thing burns if the temperature is high enough , ih its soo bad then why did MAZDA use tha system instead of a separate two stroke oil injection system? . HURLEY uses the direct oiling on a 8 second drag bike makind lots of power , so I think something has to be good about the mod!. What about the piston counterparts ? , dont they employ a splash lubrication system for inside the cylinders ? http://www.mazdatrix.com/faq/cutaways.htm , so why isnt the burning of oil such a big deal , because I know that some of the oil is consumed and the rest removedby the oil ring. -Ted |
SHIT !!! you gyys are really agains this mod. , I'll think on it some more and let you know what I decide. By the way anyone with the PCV adaptor. ?.
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Garfinkle has the adaptor in his FD the omp had to be modified to clear the twins ,he uses amsol 2 cycle oil
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The mod sems like a re-engineered OMP system.
The reason we don't like it is that the basic premise of the OMP is flawed. Sure, it's great for people who are idiots, it's one less thing for them to worry about and that means less problems for Mazda. But let's assume that the average enthusiasts are not idiots. We'd be willing to take the (very minimal) time to pop a bottle of 2-cycle in the tank before every fillup. Heck it takes less time then checking all the tire pressures and topping-up as necessary at the gas station air hose. Rotaries look REALLY ugly inside after they've had a diet of dirty motor oil instead of nice clean, clean-burning 2-cycle. We're talking scoop the carbon out with a spoon and a chisel kind of ugly. As for drag engines... It's a drag engine. You can run a drag engine with NO lubrication. I know of 30 year old cars that are only used for drag racing that have under 1000 miles on their original odometers. I've personally driven much more than 1000 miles with no OMP or premixing whatsoever, no ill effects to the engine. I was NOT kind to the car, I drove it with all the enthusiasm of someone who just got his first RX-7. For 2000 miles, God only knows how many miles the PO drove with the a dead OMP. |
Originally posted by Marcel Burkett SHIT !!! you gyys are really agains this mod. , I'll think on it some more and let you know what I decide. By the way anyone with the PCV adaptor. ?. -Ted |
Originally posted by RETed Do you know what "normal" oil consumption is for a piston engine?  Not counting all the recent Chevy "blunders" with the Corvette and Camaros, most piston engines will easily run 50,000 miles before consuming a quart of oil - some will run 100,000 miles (i.e. Honda) due to really tight tolerances of their engines.  So we're looking at a 10x to 20x difference in oil consumption rates!  Piston engines were not designed to consume the engine motor oil.  If they could, the would shoot for "0" oil consumption, as this would imply total sealing and next to nil blowby.  Blowby contaminates the oil and turns it acidic.  Next to viscosity break-down (Castrol GTX commercials), it's probably the #1 problems for engine oil engineers -Ted also the metering pump is a direct lineage from nsu. mazda just kept it, beacuse it works for them. mike 65 nsu wankel spider (sold) 72 r100 |
Ted (And Others)
Do you think I should start adding some premix 2 stroke to my tanks on fill up then ..just as an extra help??? My OMP is working fine but I've got a larger than normal streetported motor with non-seq twins and I am in boost pretty much all of the time. I've got a heavy foot. Should I start adding ...say 1/2 Qt per tank as a started ?? BTW, Can anyone tell me :- 1) What is the Fuel tank capacity on the FD ?? 2) What is the cooling system volume on the FD ?? |
Originally posted by 3rdGen7 Ted (And Others) Do you think I should start adding some premix 2 stroke to my tanks on fill up then ..just as an extra help??? My OMP is working fine but I've got a larger than normal streetported motor with non-seq twins and I am in boost pretty much all of the time. I've got a heavy foot. Should I start adding ...say 1/2 Qt per tank as a started ?? BTW, Can anyone tell me :- 1) What is the Fuel tank capacity on the FD ?? 2) What is the cooling system volume on the FD ?? |
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