Thanks for translation

 

Well so far ive took the cover off and i dont see any wear at the moment and car still run perfectly fine.

 

I did my first track day with the Toda Oil Control Orifice installed and plan to get a UOA done next time I change my oil. However if anything weird shows up in the results I'll have to test again because this oil has another track day without the orifice in.
I will say that I used to fill 1/2 - 3/4 of my ASM(Cusco) catch can each session and this time I went the whole day with effectively no oil in the catch can. So there is definitely less oil sloshing around up in the head.

 

After a little bit of searching (Again: Why is there no oil flow diagramm of the the Engine in the FSM, Honda? ) in my opinion it is almost safe to say that this orifice only reduces the amount of oil flow to the VTEC slide pins in the rocker arms.
This reduces the amount of oil wich unnecessary splashes around under the valve cover, get sucked through the PCV valve and burned away.

Am i right? Am i wrong?

 

That was my conclusion but I was also unable to find an oil flow diagram

 

So if this is the case, does that mean only potential issue with using this orifice is if it reduced pressure to those pins so much, there wasn't enough oil pressure to operate vtec? Or possibly operate it on some cylinders, and not others (ones farther down stream)?

Maybe Honda went with sending more pressure to vtec pins than needed, to account for wear? To account for less engine oil pressure over time? To allow vtec to still operate well into engines later lifespan? Like, they imagined more impact from wear than we actually typically see?

 

To my understanding: It´s not about the pressure, its the amount of oil, the flow wich the orifice reduces. The pressure should be equal (more or less) in the whole oiling system of the engine, but the amount of oil wich actuate the VTEC sliding pins is reduced to the necessary one. This reduces all unnecessary splashing around in the head. This leaves more oil in the Oil pan. The Oil pressure in the Engine could maybe also be more stable when the VTEC is actuated.
This could be beneficial for the main and rod bearings to, and that is what Toda wrote.
Toda knows their stuff...

Any engineer here or somebody with more insight? I am only guessing.

 

Yes, flow. I was wrote oil pressure, but meant oil flow.

AI LLMs simply try to guess the next best word following the one used before, and within the context of the subject. It turns out human brains do that too sometimes.

In my case, the most common word I'd typically use following the word oil, in the context of engine lubrication, is pressure.

We can sometimes make the same mistakes AI does.

We use different types of thinking to address different kinds of problems. Often using several kinds at the same time.

AI is actually a lot of different things, each of them mostly analogous to a type of human thinking. LLM, NLP, OCR, Object Recognition. But AI doesn't have all the types represented yet. And it definitely isn't as good at using several at same time as real brain does.

But its interesting how this word choice error mirrors how LLMs work (and make errors)

 

Anybody has news or insights about this?

 

According to the parts list, it looks like toda uses this Oil control orifice on every S2000 engine they build.
https://www.toda-racing.co.jp/en/pro...comp-f20c.html