"we don't have any technical data on this product". even though we made it.

it's magic and it works, trust us /wink

 

Yea this is dumb....That email said everything I needed to know.

 

Toda is a extremly reputable Company, not a backyard tuning company. Maybe they dont tell everything or there is something lost in Translation?
On the other hand, it´s hard to belive that Honda has made such a flaw in the design of the Cylinder head.
Regarding the technical data, how could you meassure the amount of oil flow to the cylinder head? At least they monitored the Oil pressure before and after.

 

I'm hoping if you email them in Japanese they will provide a bit more info.
My friend got busy at work the other week and forgot to email them and it is a National Holiday today.

 

That's what I'm thinking too

It does say on their site that is for competition and track usage. VTEC is like a big oil leak in the head and possibly under extended usage with high oil temps on the track restricting the flow slightly to the head could be beneficial to the bottom end, I doubt this will product will have any affect on a street driven car. So even if this is solving an issue I wouldn't consider it a design flaw.

 

Yes. i think it´s better for the main bearings to change the Oil jet bolts every now and then to maintain proper oil pressure at idle.
https://www.s2ki.com/forums/s2000-un...bolts-1204068/

 

Toda just makes products. Randomly, it seems, a lot of times.

So now they make an oil limiter which limits oil pressure to the head, in order to use it on the bottom end. It likely came as a byproduct to some other system they were developing.

Toda does make "VTEC killer" cams, which lock the
big lobe at all times. So now you don't need all that oil pressure going to the head anymore. So maybe that's something this pairs well with?

The user has to find a place where this product applies to THEIR car. Doesn't mean one automatically *needs* this part for your stock, or even modded S2000.

Their email reply is just saying that this should be fine if you want to use it on your unmodified car. It pretty much reads, "We make this part. It does something. Idk...use it if you want, whatever."

However...the stock oil pressure is known to work great on unmodified cars. And there are millions of collective miles of testing and use to prove that. This isn't an issue on the S2000.

I guess Toda's answer also insinuates that they think the top end gets more than enough oil pressure that it can stand to lose some. So this part *could* help prevent bottom end damage during a low pressure event. It may damage the top end in that event, but the top end of these engines is more servicable.

It could also completely ruin your engine.

I have no idea why someone would pick this up as a "well I'll go install it because Toda makes good parts" without having an actual purpose for installing it. Seems like that's what has been done by one user. Idk...people like buying random shit, I guess.

 

lol ???
Did you have problems hitting VTEC before?

It's your car. But the lack of logic is what I'm questioning. This doesn't make sense.

 

Maybe made for there stroker engines so piston thrust/speed is better lubricated at the lower of the cylinder bore,as oil is increased by psi 0.5 kg

 

Here is what Toda said:

Google Translate
Thank you for contacting us.
My name is Gennai from Toda Racing.

Regarding the engine oil flow control orifice,
Although this product is intended to ensure oil pressure during hard driving,
This is a highly recommended product, regardless of whether it is driven on a circuit or not.
Also, regarding engines that have not been tuned up.
It is effective if you keep in mind the need to maintain hydraulic pressure.
I think it's difficult to experience it, but the number of over-driving cars is increasing these days.
This product is also intended for engine protection (maintaining oil pressure below the waist).
I hope you will consider it.

Thank you very much for your understanding.

Chat GPT
Thank you for your inquiry. My name is Gennai from Toda Racing.

Regarding the engine oil flow control orifice, it is a product designed to ensure oil pressure during hard driving. It is highly recommended not only for circuit driving but also for any type of driving. Additionally, even for engines that have not been tuned, it can be effective if the focus is on maintaining oil pressure. While it may be difficult to quantify in terms of sensation, considering the increasing number of vehicles with high mileage nowadays, it is also a product aimed at engine protection (maintaining oil pressure below the waist). Please consider it, and feel free to contact us for any further information.

Thank you very much.

I think it will be difficult to get any real data from them but it looks like they are even recommending it for high mileage stock engines (I think what the Japanese consider high mileage is lower than what we would consider high mileage). Doing engine "refreshes" is more popular in Japan than here and maybe they've seen bearing wear which lead to the development of this.
Who wants to be the guinea pig?

Edit: when I post the original Japanese for some reason my post gets cut off