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.

[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?

[88turboii]

direct injection ftw do iiit

[RETed]

Originally Posted by 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?

Not a good idea...

Fuel injectors are positioned in (narrow) intake passages to take advantage of the higher intake velocities.
You stuff the fuel injectors into the rotor housings, and you lose a lot of the atomization due to the inferior intake velocity.


-Ted

[sen2two]

Very true.

[hybrid G]

How about adding water or methanol injection nozzels, to cool the intake charge ?

[sen2two]

Thought about that, but I believe that meth injection works better as a chemical coolant when injected earlier in the air stream to better atomize and remove the heat.

Although I have no idea if that is true. Just a guess I am making. If anyone here has more insight, as if this is a "better" place to inject meth... Speak up!

[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.