ESE's works engine tuner

[oldjohnno]

Here's a thought: if the cylinder could be locked down with horizontal cams through the top of the cases acting on lathe chuck style pins, then there'd be no need for
openings through the barrel at all. The head would be held down with short capscrews and the pins in the base of the barrel would only need to be screwed in maybe 15 - 20mm deep. It might allow more freedom in port layout and the camlock setup has proven to be very secure in holding on a chuck.



An alternative would be external tierods - this would eliminate the head and barrel fasteners altogether in the port areas.

[JanBros]

Attachment 339511

almost all cylinders have the C-port extending below BDC, what is the benefit of that ?
doesn't the moving piston create unwanted turbulence ?

[Muhr]

They claim 250 kg of clamping force per piece

https://m.youtube.com/watch?v=IR820heX2_w

[Ocean1]

Here's a thought: if the cylinder could be locked down with horizontal cams through the top of the cases acting on lathe chuck style pins, then there'd be no need for
openings through the barrel at all. The head would be held down with short capscrews and the pins in the base of the barrel would only need to be screwed in maybe 15 - 20mm deep. It might allow more freedom in port layout and the camlock setup has proven to be very secure in holding on a chuck.

I'll just point out, here that a thread is just a helical wedge....

[husaberg]

No good to us as two stroke rings are far to high compared to the gudgeon but interesting concept
The pin buttons are retained by the oil ring


I seen this pic as well its a Russian V12 warbird it must be pressed in but the buttons ends look aluminim i thought it was retained from ther inside with pis but it doesnt appear to be.

[TZ350]

The big move now is to strip out the old Ecotrons ECU and fit the new Speeduino unit with my modified sensors firmware. Looks easy but will take a night or three.

[TZ350]

Goodby to an old friend, the Ecotrons ECU. Without meaningful support from Ecotrons, and with their help dept a nightmare to deal with, I have given up on them. After a lot of careful work I have to say that their 2S EFI system as it is, with its limitation of only being able to run a Alpha-N map is useless for high performance two stroke fuel injection. This thread goes into the technical details of why Alpha-N is not enough:- https://www.kiwibiker.co.nz/forums/s...2T-EFI-Project

[jamathi]

almost all cylinders have the C-port extending below BDC, what is the benefit of that ?
doesn't the moving piston create unwanted turbulence ?

There is no benefit at all!

[Larry Wiechman]

What is the function of the port above the wrist pin? (Not the lube slot.)

[Frits Overmars]

What is the function of the port above the wrist pin? (Not the lube slot.)

Look carefully Larry. They're not ports, they're just pits for weight-saving purposes.

[jamathi]

Look carefully Larry. They're not ports, they're just pits for weight-saving purposes.

And totally useless, I hate them

[jasonu]

Has anyone tried port filling with map gas and aluminum brazing rod?

I doubt you would get it hot enough.

[jasonu]

Goodby to an old friend, the Ecotrons ECU. Without meaningful support from Ecotrons, and with their help dept a nightmare to deal with, I have given up on them. After a lot of careful work I have to say that their 2S EFI system as it is, with its limitation of only being able to run a Alpha-N map is useless for high performance two stroke fuel injection. This thread goes into the technical details of why Alpha-N is not enough:- https://www.kiwibiker.co.nz/forums/s...2T-EFI-Project

Be sure to tell them so.
And direct them to this thread.

[TZ350]

Be sure to tell them so. And direct them to this thread.

Good Idea. I sent Matt of Ecotrons links to this thread and this other one too, which is all about my new Speeduino EFI system. https://www.kiwibiker.co.nz/forums/s...2T-EFI-Project

I have been doing a lot of work they could have benefited from, their loss I recon.

[TZ350]

Got the Speeduino mostly wired in. I had forgotten the IAT and CLT temperature probes. And I still have to figure out how to incorporate the old wide band oxygen sensor. And I am still going to use the Ignitec ignition because it has a lot 2S specific things like a 3D mapped TPS based ignition and PV power valve controller. To use the Ignetec, my plan is to have the Speeduino fire continuously at a fixed 15 deg BTDC to mimic the old Ignitec pickup.

Hopefully I will get to see if we can kick the old girl into life tomorrow night.