ESE's works engine tuner

[peewee]

haufen let me ask something about the extension. on each end where its machined down to fit inside the arm. the machining will produce sharp inner corners. do you think i should make these inner corners have a small radius instead or it isnt critical ? i always thought a crack can form at sharp corner but maybe this situation isnt a big deal. cheers mate

[jamathi]

First Ryger trackrecord verified by Eefde: http://kartingeefde.nl/karten

Next step: winning race
Next step: publication

Regards, Luc

A lap record on a track where no races are held has very little meaning....
The last 'record' was made in 2011, as everyone can see.
Improved by 0,3 seconds
And KZ's are not even permitted at that track.
So they beat a RENTAL kart record......
Incredibly ridiculous!

[jellert]

A lap record on a track where no races are held has very little meaning....
The last 'record' was made in 2011, as everyone can see.
Improved by 0,3 seconds

Exactly, I could go to Eefde with a decent kart and spend days refining the setup to see what laptime I can get. But the track is so tiny and irrelevant that it would be a waste of time and money. We will probably never see a laptime to compare this with, because no KZ driver wants to go to a Mickey Mouse track where no races are held.

[Peter1962]

Sounds to me like you are the ideal candidate to use one of the freeware road dynos available on the net. Some even allow for temperature and ambient pressure correction, which gives results almost as accurate and repeatable as a real dyno (once the vehicle has been calibrated, otherwise it's just qualitative, but nevertheless repeatable). This way, you (and we) could gain much more insight about the effect of your engine modifications. The electronics needed are not really complicated and can be bought / modified for cheap and rather quickly as far as I remember.

What do you think? If you're interested, I am sure someone around here can provide a link and / or documentation of such a system.

The power CDI system would give the repeatability you need for comparable runs, and it could also help in finding the best advance curve.
http://www.powercdi.com/en.html
Some explication by Fabio of his system can be found here : http://ktmtalk.com/showthread.php?53...-is-addressing
Go to posting nr 27 on page 3 for the info on the DPC.

[katinas]

The power CDI system would give the repeatability you need for comparable runs, and it could also help in finding the best advance curve.
http://www.powercdi.com/en.html
Some explication by Fabio of his system can be found here : http://ktmtalk.com/showthread.php?53...-is-addressing
Go to posting nr 27 on page 3 for the info on the DPC.

Yes this would be very helpful

Thanks

[Haufen]

haufen let me ask something about the extension. on each end where its machined down to fit inside the arm. the machining will produce sharp inner corners. do you think i should make these inner corners have a small radius instead or it isnt critical ? i always thought a crack can form at sharp corner but maybe this situation isnt a big deal. cheers mate

If you were to use screws only, then a radius would for sure be beneficial to avoid forming cracks. But as you are going to weld over it anyway, this should not be an issue, as it will be like one piece after welding. What's the wall thickness of your extension going to be?

[jamathi]

Vannik has done a Ryger simulation.
Very revealing!
Of course I will leave it to him to publicize the results here
Or you can look at 2Stroke.tech.com where you can already find them

[Vannik]

Jan is correct, I did a simulation of what I think a Ryger engine looks like. In the simulation I assumed good scavenging and good normal combustion. The layout is a stepped piston with the step smaller than the main piston, unlike the traditional stepped pistons where it is bigger than the main piston. The rest is just gas-dynamics and plenums. If this is close to the Ryger in its current format I do not know.

[jamathi]

It will be very near I think.....
Thank you Neels!

[jamathi]

The whole story is a bit ridiculous after all the comments that were made in the past....
HCCI et all.
Now the scrapheap is waiting patiently!

[lucf]

Jan is correct, I did a simulation of what I think a Ryger engine looks like. In the simulation I assumed good scavenging and good normal combustion. The layout is a stepped piston with the step smaller than the main piston, unlike the traditional stepped pistons where it is bigger than the main piston. The rest is just gas-dynamics and plenums. If this is close to the Ryger in its current format I do not know.

Very wise Vannik to be carefull with your conclusion !

[Vannik]

Very wise Vannik to be carefull with your conclusion !

Luc I still hope it will come to something. And in this case I do not know what it is that I do not know.

[SwePatrick]

Can someone help me?
I need to get my inlettract correctly tuned in hunt for power.

I´m not too good at calculation on this, can someone please help me, i´m adding a picture of my inlet.
The length isn´t correct, but the diameters is.

I have reached to this date 71.35hp on the sprocket at 12800rpm (one cylinder 211.2cc, methanol)

[Norman]

Luc, maybe you are not able to answer, but do you think we will see additional patents covering the Ryger engine concept in the near future?

[lucf]

Luc I still hope it will come to something. And in this case I do not know what it is that I do not know.

A matter of time Neels !