ESE's works engine tuner

[jasonu]

And for a starter maybe the best craft beer.
.

I call bullshit on that Dave.

[F5 Dave]

I said maybe because I was a bit drunk and I haven't tried much overseas stuff lately. But beer here has improved enormously in even the last 5 years. Of course you can still get th e usual bus drivers swill, but the supermarkets carry a huge range of diverse beers as a sideline.

Well, probably not so much in Fonganui.

[wobbly]

Well here is one the you cant call bullshit in in shape or form.
Wild Earth, Central Otago, Pinot Noir - best red wine in the world at the biggest international competition.
Goes fairly well with Wakanui Brisket on the smoker for around 12 Hrs.

[ceci]

5 component completed, evolution progresses,

[jasonu]

Did somebody say brisket?????

[Flettner]

5 component completed, evolution progresses,

I've not been keeping up to date on this thread, what are we looking at here?

[ceci]

there is no thread here of this project, some of you know where this thread comes from and you know what is shown, how it works (basic concept), and what it is for

[Frits Overmars]

5 component completed, evolution progresses,

I've not been keeping up to date on this thread, what are we looking at here?

there is no thread here of this project, some of you know where this thread comes from and you know what is shown, how it works (basic concept), and what it is for

So, what about the rest of us?

[husaberg]

So, what about the rest of us?

Well Dave has vino?

[ceci]

Some of you know that it comes from a facebook page in which I have shown more photos and I have explained my ideas, this is the last 20% corresponding to the 5th component, if the one that has to avoid the loss of hydrocarbons

[ken seeber]

Some of you know that it comes from a facebook page in which I have shown more photos and I have explained my ideas, this is the last 20% corresponding to the 5th component, if the one that has to avoid the loss of hydrocarbons

Ceci, I looked up your name in FB, but I could find nothing.

It’d be nice if you could give us more details, given that your interesting design is in the public domain.

From what you have said, it appears that there is some focus on emissions and reduction, which is always good for the 2 stroke.

The cylinder appears to have 2 exhaust outlets each feeding from 2 cylinder ports, not unlike other FOS style arrangements.

The crankcase looks interesting, with what appears to be a mounting flange for an oval shaped catalytic converter. Can this be right?

Assuming I’m wrong, we’d love to have more details of the concept.

Cheers.

[katinas]

Obviously. But that is true for all piston shapes. And as the piston edge is radiused all-around, matching the combustion chamber to it is a piece of cake.

How do you figure that? A radiused piston timing edge at the transfer ports greatly promotes flow attachement to the piston dome, which does wonders for both the flow coefficient and the piston cooling.
Attachment 334949

Flow from the cylinder into the transfers must of course be discouraged, so the top edges on the transfer windows must indeed be sharp. But a radiused piston top edge has very little influence on flow in that unwanted direction.
The nozzle effect that we hoped to achieve at exhaust opening, does not play a role at transfer opening because, even if the blowdown time.area has been insufficient and the cylinder pressure is still higher than the pressure in the transfer ducts, the pressure ratio will be subcritical, so the flow will be subsonic.
The benefits of a radiused piston top edge for better transfer flow into the cylinder and better piston cooling are far more important.

Friend tested KTM SX 65 radiused piston top edge and without any head matching modification, power rise 0,8 hp.

I have never seen a better school class room than this, Frits.

[wobbly]

So 0.8Hp with a piston edge radius, but where ?
Did it lose 2 Hp at another point in the powerband.

[ken seeber]

Some of you know that it comes from a facebook page in which I have shown more photos and I have explained my ideas, this is the last 20% corresponding to the 5th component, if the one that has to avoid the loss of hydrocarbons

Ceci,
It has been pointed out that the oval feature has a moving piston, so nothing to do with the catalyst. Dumb me.

So, as its movement appears to be in close phase with the piston, then it may provide some sort of extra crankcase pumping capacity, something like DKW etc have done.

Still interested.

[WilDun]

Ceci,
It has been pointed out that the oval feature has a moving piston, so nothing to do with the catalyst. Dumb me.

So, as its movement appears to be in close phase with the piston, then it may provide some sort of extra crankcase pumping capacity, something like DKW etc have done.

Still interested.

At first I did have the idea that it was the same as a diapraghm pump (but using a piston instead of a diapraghm), ie driven by crankcase pumping in order to keep the fresh charge from the crankcase.
I thought someone would explain but it seems that everyone else is in the dark as well!

Why all the mystery in the replies? - not a wind up I hope!