matthewpims

From my understanding the only lubrication the apex and side seals recieve is from whats scraped off of the housings correct? Hence the addition of oil into the air/fuel mix. If I am thinking clearly (correct me if im wrong) the apex seal acts in part like a spatula and the tiny coating of oil thats left on the housing surface from the combustion process piles up on the leading face of the apex seal and then in theory works its way down under and up the otherside or just passes over top of the seal. Ive seen modifications where oil is pumped via a relief valve through the rotor to the bottom of the apex seal via a hole thats drilled from the core of the rotor. My thinking is, like the tiny oil indentations that are on piston skirts to hold oil there, would it be adventageous to perhaps make a series of small groves or channels going from the top of the apex seal to the bottom (very minute maybe .003 deep) the entire length spaced maybe a 1/4" apart on both sides, that taper twords the bottom. In effect making channels for the oil that "piles up" to more easily travel down benieth the apex seal and lubricate them better? Just a thought... whats everyone think?

andrew lohaus

hmmm. interesting idea. the only downsides i can see to it is that you would have to make a way to prevent the gasses of combustion from getting back through that channel and into the oil (this is a very bad thing, essecialy blowby) and also, it leaves no way of metering the oil which is critical if for nothing else than oil consumption (so your engine doesnt run dry in the course of a one hour drive) also, passages as small as .003 are pretty much gauranteed to become plugged with carbon almost emmediatly (especialy if burning crank case oil) when that hapens, no more oil, bye bye engine.

premixing is the only real alternative to the omp that at least ive heard of working succesfully.

matthewpims

Thats what I was talking about, Keeping premixing totally, I wasnt refering to the drilling of the rotor, although dangerous in some conditions, I was simply wondering if those grooves would help the apex lubrication, you are correct about the clogging, didnt think about that

Shamrock.James

we looked into this in another thread, another main point is the fact that you will burn the oil, and engine oil is not really suitible for the situation.

RETed

Pre-mixing is superior and dealing with oil injection of engine oil from the "crankcase" will always be an inferior design.


-Ted

2600+ ppm

how much oil should i add to a 16 gallon tank?

dag

16 ounces is fine.

-David Guy

12ARX

So if you only premix (disconnect omp) on injected cars that switch off injectors while decellerating no oil is being injected right ??? Isn't better to keep OMP and run it from external tank with quality 2 stroke oil like the aviation rotors do ??? So its still injected all the time at recommended ratio/revs while using clean oil...

matthewpims

I still dont think everyone quite grasps what im talking about, I would not be burning engine oil.. period, the omp would be blocked off premix only. There will be no oil feed from the interior of the irons, Im talking about creating channels for the residue from the premix on the housing surface to work its way under the apex seal better. However they would clog rather easy.