Oil injection hole... Put to good use?

[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.

[FC Zach]

Originally Posted by 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!!! LOL, downshifting and any other closed throttle condition where the RPMs are still above idle, very minimal wear (if any) but its just a concern I have. I dont race BTW, just a very spirited driver

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'd say if any probably very minimal but I'm curious to know as well. 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.
I'd say as long as the ratio isn't as high as a WeedEater's 40:1 it would go unnoticed