ESE's works engine tuner

[2T Institute]

Where is rgvbaz he loves his 'trombone' sections

Looks like it works a treat, which clever Dutchman thought of that Frits? I would have a map 2 for it when warming up in the pits making it go longer with rpm.

[Frits Overmars]

Looks like it works a treat, which clever Dutchman thought of that Frits? I would have a map 2 for it when warming up in the pits making it go longer with rpm

It was designed and built by Richard Maas http://www.adriaanmeeuwsen.nl/team-pagina.html. Hopefully we will see it in action next monday.
And if I were you, I would make it go shorter with rpm .

[dinamik2t]

I'm impressed with how it slips all nice and steady!

Frits, may I ask, wouldn't it affect the 1st pressure wave in the diffuser, when fully inserted? -in a way to have a measurable impact on pipe effects I mean

[Frits Overmars]

....Frits, may I ask, wouldn't it affect the 1st pressure wave in the diffuser, when fully inserted? -in a way to have a measurable impact on pipe effects I mean

You may. It will affect all the waves in the pipe. And it does have a measurable impact on pipe effects .
But I suspect you are referring to the header intruding into the diffuser. It doesn't. Even in the shortest position everything is smooth inside the pipe.

[dinamik2t]

Indeed, my question was about the header smoothness and everything around that. You are a master suspector
And obviously, since the 1st would be affected, the following ones would be affected also.

The header is as long as the displacement I suppose.

The whole innovation of system reminded me of your 24/7 valve somehow. So, I have another question since I may.
I remember you giving directions for an experimental 24/7 at Pitlane. 'One petal should suffice and valve should be placed in a way to direct flow correctly'.



Say we have the above valve. The side with the opening & reed petal should look up towards the cylinder, or down towards the crank?
(I assumed I didn't need a new may permission, sorry)

[Frits Overmars]

Indeed, my question was about the header smoothness and everything around that. You are a master suspector

Say we have the above valve. The side with the opening & reed petal should look up towards the cylinder, or down towards the crank?
(I assumed I didn't need a new may permission, sorry)

You are a master assumer, Dinamik. But I don't see no valve....

[dinamik2t]

Thanks! It has been my dream since forever.
How about now?? It's in gif format.

[Frits Overmars]

How about now?? It's in gif format.

It's fine now.

I remember you giving directions for an experimental 24/7 at Pitlane. 'One petal should suffice and valve should be placed in a way to direct flow correctly'.

I don't remember me saying it quite like that. I said something like 'one petal should suffice and once the engine runs in the powerband, that petal should swing out of the way so it will not hinder the flow'. That requires a hinge, like so:

[dinamik2t]

Yes, ok about the mechanism to open and hold the whole petal steady. I coundn't CAD it, that's why it's not there.
My question is about where the reed side of the valve should 'look'.
Assuming - -the large angle side has the reeds, should it be looking at the cylinder or at the crank?
It might seem obvious that reed side should be up, but my question derive from having seen reed valves tilted downards and others upwards.

(I -probably- exaggerated the angles to make my point)

edit:

To help you suspect - - me: why should it be the right (or the left) ?

[husaberg]

You are a master assumer, Dinamik. But I don't see no valve....

Much more of a master-debater myself I reckon I am finally getting a handle on it now.

It was designed and built by Richard Maas http://www.adriaanmeeuwsen.nl/team-pagina.html. Hopefully we will see it in action next monday.
And if I were you, I would make it go shorter with rpm .

Didn't we discuss this a while back and decide it was worth the effort?
or did i give up to soon?

The 24/7. I was thinking along the lines of electromagnet (bloody stainless steel probably ain't magnetic is it). Or with pneumatics.?
Or

Has anyone ever tried a butterfly style valve in place of the reeds.(much like a carb or throttle body or tz's atac with a light spring.)Obviously needs to be mounted 90 degrees from pic.

I know early 2 strokes had tried poppet valves.But never seen a butterfly valve (could be a good reason for this)Might not open?



The other thought was for a flat style reed plate much like these below
Only with Boyesen like plates rather than the curved stoppers ( to keep the length of the let nice and short) that way it could simply slide out of the way. As it is not meant to make power of the powerband anyway just aid starting and low speed running i don't see why the shape or flow characteristics would be that important.
Failing that a flat plate would also be a lot easier to hinge?

[Frits Overmars]

Say we have the above valve. The side with the opening & reed petal should look up towards the cylinder, or down towards the crank?

For the flow into the transfer ducts it would be best if the petal would look up towards the cylinder. But that is rather irrelevant because any time the petal is 'in function' the engine is running outside the powerband anyway.
I would have the petal look down towards the crank in order to concentrate the flow towards the big end when the petal is operative.

[dinamik2t]

For the flow into the transfer ducts it would be best if the petal would look up towards the cylinder. But that is rather irrelevant because any time the petal is 'in function' the engine is running outside the powerband anyway.
I would have the petal look down towards the crank in order to concentrate the flow towards the big end when the petal is operative.

I see. Thank you!

-uploaded a better pic above, by the way-

[Myron]

For the flow into the transfer ducts it would be best if the petal would look up towards the cylinder. But that is rather irrelevant because any time the petal is 'in function' the engine is running outside the powerband anyway.
I would have the petal look down towards the crank in order to concentrate the flow towards the big end when the petal is operative.

Frits, are you saying that when in the powerband, a petal would tend to be open all the time? Or that you could rig it so it would have to be open all the time when in the powerband?
Myron

[2T Institute]

It was designed and built by Richard Maas http://www.adriaanmeeuwsen.nl/team-pagina.html. Hopefully we will see it in action next monday.
And if I were you, I would make it go shorter with rpm .

Yes but in the pits it would go longer with rpm

Suzuki Gallina team fell into the same trap trying to get a ATAC valve to work after seeing it on a works honda , one day a mechanic wired it up incorrectly and made it close at high rpm , next year all the RGB 500's RM's and RG road bikes had a AEC .

[Frits Overmars]

Frits, are you saying that when in the powerband, a petal would tend to be open all the time? Or that you could rig it so it would have to be open all the time when in the powerband?

I'll rig it so it sways out of the way and stays there as long as the engine runs in the power band.