Ahh, i thought you meant fuel injetion in general, not boats, not saying you don't know just maybe it was an accident. Bleh whatever.

Needless to say, the engines that are still running, for the most part, are the majority. I know of plenty of NAs that have failed before 140k.

Either way, the engine gets lubricated as long as the injection system is working. The statistic should be how many engines are blown with each system, how long do they last.

Also, if you could please, tell me what it hurts having too much premix go in to the combustion chamber.

Also...

Yes, but basically, the one on the housing does jack **** for the most part, at least in my opinion, wether thats valued by anyone else or not. Obveously.

 

Looks different before it's cleaned, however you can see how it wears differently.

 

O really? Confirm this please.

And you can pin this directly on the OMP system? IF you ran a brand new engine with 2 stroke from day one, I have no doubts that it could potentialy last longer. I can't argue about that. I just don't understand why people think premixing on a high millage engine will do any good.

Mine failed at 162K miles. My oil seals were also warn so it was sucking in lots of oil and gas was also getting into the oil which would kill the lubricating properties of the oil.
Premixed for 4 years.
Engine had 85 PSI on all faces.
Sat for 2 years before I got it.

It wasn't the best.

There are a lot more factors that come into play when an engine blows.

2 stroke is not combustable like gasoline. I remember twice when putting in to much 2 stroke, more then 1oz per gallon, the car run much slower.

With each system? How many systems are you thinking of?

 

Renni's have the injectors at the sides hmmmmmmmmmm....

Too much premix fools with the octane rating from what I understand, it smokes if there's too much, fouls plugs, etc etc.

I still say - O/B's and weedwhackers and **** like that need the premix to lube bearings under extreme loads. I would think the load on a main bearing on my 200HP Merc running @ 5700 and 67mph is alot more than the Apex Seals. Just my theory and my reasoning.

Thats a good pic up there. Is that 4-stroke oil or 2-stroke oil? 4-stroke doesn't mix well with gas. 2-stroke I think would atomize and distribute itself better. Premix is definately the best, but I refuse to do it. I hate premix. It makes me angry

 

Look at the pic


So is the 2-stroke spitting out the muffleres

 

I actually asked guy over here at my work. He builds engines for drag cars and other vehicals. I asked him about the 4 stroke oil in gas and he said it mixes very well and never comes out of suspension when mixed.

I have not done an experiement like this so I can't confirm this but thats just what he said.

 

Still has not confirmed it does jack. It does seem to be more centralized. This could be the reason Mazda put injectors in the manifold. I have never seen that line though.

Did I say it wont burn?

When I say combustable I mean the way gasoline combusts. You can't run an engine off of 2 stroke can you?

 

how can I block my omp in a s5 without going in a limp mode? do i have to swap the ecu to s4 to make it work.

 

2, premix, and mop.

Personally i think the only way to test would be to build 2 identical engines and measure the wear over a period of controlled running time.

 

You could get an rtek

 

you can block it off but you have to leave it plugged in unless you run a microtech or something. What I want to do is take apart the omp since so the plugs can be plugged in but I don't have that box things thing just chilling. I can't seem to get an answer on that but I might expiriment on it.

 

I don't think rteks were meant for s5?

Idk but I know it isn't cheap dood.

 

I would really like to see that. This would be a good experiment.

I believe Rtek 1.0 is out for S5 which only has the MOP deletion from what I remember. More on this can be found in the Rtek section

 

i'm talking about s5 na engine, if I block omp will ecu still run without going on limp mode.

 

Yes you can block off the S5 OMP you just need to leave it plugged in and shuve it to the side.

 

Definitely do! When I get around to doing a TII swap on my car I'd like to have it be an S5 block but with an S4 front cover for the mechanical OMP. It'd be nice to have some other way to have the car think the OMP is there without having to tape the OMP somewhere in the engine. I imagine someone with electrical expertise could figure out where and how the signal is sent to the computer/ECU and maybe make just a terminator plug that goes into the harness the OMP plugs into.

 

Was that a brand new housing?

 

It was pulled out of a stock engine with the omp system, 100k+ miles.

 

I tend to agree with rotorman99. To me, either way is acceptable. But don't kid yourself on the reasons you removed it. If it was me (mine is still in) my reasoning would be a cleaner engine bay with 4 less vac lines. Again, that is just me.


As I said before, either way is acceptable. When I replaced the 20+ yr old plastic lines with the PFA teflon (write-up in archives), i felt it necessary to premix until I saw the oil reach the injectors. The oil moves so slow, I am sure that dirty oil ends up in there for a good period of time. That will not stop me from continuing to use the OMP in stock form, as I change my oil every 2500-3000 mi, and EVERY change I use a new filter (mobile one, not the crappy frams). Feel free to flame on choice of filter, as I care not, this engine is so old, a rebuild is emminent.

 

Did you check the oil flow of the MOP before you put the lines on? Thats very slow.

 

Yea, something like 150:1. It doesn't take much oil to do the job. Like I said, this arguement, along with so many other arguements on this forum is a tad trifle at best. I realize that the idea is passing correct information along, but when you get so meticulous that you are splitting hairs to this degree it seems ridiculous. These aren't $100,000 trailer queens, they're a broad spectrum of personal use: from daily driven to track monsters. Now the way I see it, that means that BOTH answers can be right on the question of premix.

Someone said it before: It's solely up to you, its your car. You be the judge. 90% of the drivers of RX-7's on this forum are probably somewhere in between daily driven to slightly modded/moderately modded. With that said, it's still questionable to the absolute benefits of premix. I could see it as a benefit if it was a new engine (this has already been stated, so need I go on?).

 

Well the argument wasn't really about to premix or not. It was that members felt the OMP system parts were unreliable. Then after letting them know that it IS reliable, they further picked out every possible thing that could go wrong, we then got to the 4 stroke oil causing the rotary engines to pop.

 

As far as that goes, I don't have enough experience in that respect. I would think that the system is pretty reliable, especially on the s4's. On s5's I have heard about the OMP failing. Again, I don't really have enough experience to say the do or don't fail, or that they are inferior.

 

Not wanting to start **** RotaMan99, but calling everyone paranoid about the OMP system is rediculous. I can understand why people would be paranoid about it, you're talking about a system that's nearly 20 years old. The S4 OMP is fairly reliable, but when it does fail, how are you supposed to know? I doubt everyone on this website checks to ensure their OMP is working every couple of days. You have no easy way of telling that the system is working correctly. I feel safer trusting the pre-mix I put in the gas tank than trusting the injectors, pump, and vacuum lines.

Another reason for pre-mixing is obviously the cleaner burn that it creates. It's been show many times that a pre-mixed engines come out with less carbon buildup than what the OMP run cars do.

IMO, there is still no reason to argue over this topic. It's been shown MANY MANY MANY times over now the reasons for choose either system. Please, do a search and read the FAQ's. It's been covered.

 

Ya'all are paranoid. The stock series four pump works just dandy.

I eally like these OMP threads that pop up a couple of times a year. Their fun.