Oil injection hole... Put to good use?

[sen2two]

I just finished up my jig for doing peripheral ports (or semi-PP, and the exhaust too). I made it so I can adjust the jig to do a few different degrees of entry for the P-Port. I have a junk housing i will test it out on first to check for any vibration. It's heavy duty and I doubt will have any problems.

Any way, I was looking at it and noticed I can easily modify it a bit more to drill/mill/tap ect. where the oil metering jets would normally be. I normally do not run the stock OMP anyway, and usually use a bolt to block these off.

I then got an idea to put it to some kind of use. Maybe this could be a spot for a 3rd spark plug like they did back in the day for racing. Or even an extra fuel injector. Maybe a spot to inject meth. Not for cooling obviously since it will not cool anything if injected there.

Ideas? worthwhile? or just leave it the hell alone?

[RETed]

Spark plug?
Was that a typo?
Not a good idea...


-Ted

[sen2two]

Seen a bunch of old pictures of it being done. One was by RE Amemiya.

Here's one by JHB (picture on right): http://jhbperformance.com/downloads/...racingmods.pdf

It's been done a lot...

[NoDOHC]

The spark plug hole has to go on the compression side of the housing.

Take a second look at that housing in the picture, you will see that I mean. the one on the right is a spark plug addition, on the left, P-port

If you move the P-port up that high, you will be missing any advantage that the P-port would give.

Methanol would be cooling the intake charge if injected there, which is what you want.

Out of curiousity, why do you always remove stock OMP?

[sen2two]

lol... My bad. I was having a dumb moment about the spark plug thing.

I always remove the stock OMP because I always use pre-mix. Injecting oil into the combustion cycle is just a band aid. Not really a good idea to do.

[Pete_89T2]

Originally Posted by sen2two

I always remove the stock OMP because I always use pre-mix. Injecting oil into the combustion cycle is just a band aid. Not really a good idea to do.

Not to get into the premix vs. OMP debate, but when you run premix thru the fuel injectors, aren't you still injecting oil into the combustion cycle, just as the stock OMP system does? Granted different lubes, and slightly different entrance points into the chamber, but otherwise I don't understand the point your making. Why is this not a good idea?

[sen2two]

It always turns into a debate...

2 stroke oil is different than motor oil.

2 cycle oil also has a much lower ash content. This lower ash content is necessary to minimize deposits of sludge and grit that form if there is ash present in the oil which is burned in the engine’s combustion chamber.

[speedjunkie]

Originally Posted by sen2two

It always turns into a debate...

2 stroke oil is different than motor oil.

2 cycle oil also has a much lower ash content. This lower ash content is necessary to minimize deposits of sludge and grit that form if there is ash present in the oil which is burned in the engine’s combustion chamber.

Both of which is why I run the OMP adapter. But that is neither here nor there in this discussion lol.

[Rotary Related]

I'm sorry I just can't let the oil injection thing slide anymore.

Go look up the term "specific gravity" in reguards to liquids. Then tell me if you think oil should be injected through fuel injectors. Even different fuels flow at different rates though the same injector. I doubt oil gets through very easily. I'd love to see how much oil is just in people's fuel tanks after premixing for long periods of time. I would guess there is more oil then there should be as far as the "magic" ratio goes. Just use the OMP they work fine. Hell even my electronic one works fine all the time. Yes I've checked it multiple times to be sure.

I'm sorry everyone's assumption that the OMPs don't work right is incorrect.

I doubt it's worth mentioning on a rotary but oil de-octanes fuel pretty good as well. You want as little as possible to get the lubrication done.


A good use for the oil injector hole is to hold an oil injector. If you don't like that answer then use it to inject meth, N2O, water, propane, LPG, HHO, straight hydrogen or whatever other fuel type you like. Yes water can be used as well. Methenol will cool the charge even that close to the combustion.

Sorry for this outburst I hate premixing.

[FC Zach]

Originally Posted by Rotary Related

I'm sorry I just can't let the oil injection thing slide anymore.

Go look up the term "specific gravity" in reguards to liquids. Then tell me if you think oil should be injected through fuel injectors. Even different fuels flow at different rates though the same injector. I doubt oil gets through very easily.

This may be true but I dont have to worry about that since I'm carbed.

I'd love to see how much oil is just in people's fuel tanks after premixing for long periods of time. I would guess there is more oil then there should be as far as the "magic" ratio goes.

Not true, well at least for me. I've been pre-mixing since I built my motor in 04 and have checked my tank periodically in between different fuel delivery modifications I have done and have specifically looked for just that.

Just use the OMP they work fine. Hell even my electronic one works fine all the time. Yes I've checked it multiple times to be sure.

Yes the OMPs may rarely fail but there are other reasons why some pre-mix. A lot of people use both, one reason being lack of lubrication during deceleration. Also it is not uncommon for electronic OMPs to fail without warning, Ive seen it. I would venture to say that a lot of S5 & 6 owners do it for peace of mind.

I'm sorry everyone's assumption that the OMPs don't work right is incorrect.

I have a working OMP, I just dont like the idea of injecting motor oil into the combustion chamber, which is why I modified mine to accept 2-stroke. I still pre-mix too.

I doubt it's worth mentioning on a rotary but oil de-octanes fuel pretty good as well. You want as little as possible to get the lubrication done.


A good use for the oil injector hole is to hold an oil injector. If you don't like that answer then use it to inject meth, N2O, water, propane, LPG, HHO, straight hydrogen or whatever other fuel type you like. Yes water can be used as well. Methenol will cool the charge even that close to the combustion.

Sorry for this outburst I hate premixing.

I agree with you on this, I just want to state that there are reasons why some either delete OMPs or add to the tank alongside a working OMP

[Rotary Related]

I use the OMP and a rotary aviation adapter to run 2 stroke as well. Why bother with the tank? What kind of decelerating do you do? The pedal on the right makes you go fast. The middle pedal is just a suggestion you don't have to use it lol!!!

If your carbed then specific gravity probably won't apply but most people are fuel injected and do that which makes no sense. I think it's a hold over from the carbed days.

Have you ever run across any info involving rotary's and de-octaning fuel due to oil? I haven't yet but it can make or break a piston motor. Poor little pistons always trying to explode.....that's cute lol! I do know it's really hard to get detonation on NA Rotaries so maybe the oil de-octaning just falls in the category and does hardly ever occur.

How about hp tests? I wonder at what point you lose hp due to exsessive oil? It probably has never been tested for.

[RETed]

Originally Posted by Rotary Related

Go look up the term "specific gravity" in reguards to liquids. Then tell me if you think oil should be injected through fuel injectors. Even different fuels flow at different rates though the same injector. I doubt oil gets through very easily. I'd love to see how much oil is just in people's fuel tanks after premixing for long periods of time. I would guess there is more oil then there should be as far as the "magic" ratio goes. Just use the OMP they work fine. Hell even my electronic one works fine all the time. Yes I've checked it multiple times to be sure.

PREMIX is designed to be mixed with gasoline.
For the record, I have no measured specific gravity of clean gasoline versus gasoline + premix, but I doubt it has significant affect on it enough to throw off fuel mixtures.
I run a Haltech so I don't care - I can adjust my fuel delivery at any time with relative ease.
Why don't we all convert to standalone EMS' and this would not be a problem.
Prior to the Haltech E8 going in, I was running a rechipped ECU with no problems.
If you're worried about premix and suspension in gas...
I've had my car sitting for 2 years+ at one point; the premix was still fully mixed and suspensed in the gas tank.
In fact, the car started, ran, and almost 300 miles from Las Vegas, NV to Los Angeles, CA, once a new battery and alternator was installed.

The "magic" ratio has been scientifically concluded from Mazda.
It's all written up in SAE papers.

No one said the stock oil injectors doesn't work.
My point is that there's a better way.

I'm sorry everyone's assumption that the OMPs don't work right is incorrect.

Read above.

I doubt it's worth mentioning on a rotary but oil de-octanes fuel pretty good as well. You want as little as possible to get the lubrication done.

Premix is DESIGNED to be burned.
Engine motor oil isn't.
You just farted on yourself.

Sorry for this outburst I hate premixing.

You should've just said that in the first place and leave it at that.
You trying to argue your point makes you look stupid.


-Ted

[My5ABaby]

My car has also sat for long periods with no noticable difference in the premix. I've also been premixing for 8 years and the premix hasn't magically built up in the tank.

Originally Posted by RETed

You just farted on yourself.

-Ted

[2gslse]

Put N2O nozzles in there!!

[sen2two]

So any thoughts about adding a fuel injector there. Maybe block off the original primary position, and use this location as my primary injector position?