ESE's works engine tuner

[TZ350]

Unless Luc himself deleted them it looks like the "Mod's" have removed his last post or two and maybe blocked him. I myself won't miss a cook who endlessly tells you how good he is without ever laying anything on the table for all of us to enjoy.

Luc could have been an interesting contributor but just did not seem to grasp that this thread is like a happy dinner party. Where you only have to enjoy other peoples company and efforts and bring something for the table if you can. However humble the offering, it all adds to the occasion.

[husaberg]

Unless Luc himself deleted them it looks like the "Mod's" have removed his last post or two and maybe blocked him. I myself won't miss a cook who endlessly tells you how good he is without ever laying anything on the table for all of us to enjoy.

Luc could have been an interesting contributor but just did not seem to grasp that this thread is like a dinner party. Where you only have to enjoy other peoples company and efforts and bring something for the table if you can. However humble the offering, it all adds to the occasion.

It is a shame I am sure if he could put his ego aside I am sure he could have contributed something useful but LucF was bined for repeated abuse of forum members and attempting to derail a fine technical thread by repeated trolling of other members.
If he attempt to return under a new pseudonym he will be binned again.
KB is lucky to have overseas legends such as Jan Thiel and Frits Overmars posting as well as other occasional posters such as Francis Payart and Neels van Niekerk.

[TZ350]

GIBs installed, throttle belt lay out, bottom pulley will be on an eccentric bearing housing for system tension, top pulley will have the TPS and cable drive quadrant (throttle cable). left hand pulley is 10T , right hand pulley is 12T, I want one to open a little more than the other.

Very Clever.

But you need to go to the original post to see the pictures, this is a very interesting project. Throttling the inlet and changing the inlet timing by opening/closing the aperture on the rotary valve cover.

[Flettner]

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[F5 Dave]

I remember Greenie telling me that getting some help from Wob showed him how little he knew. I thought; yeah sure. But this thread sure showed me how little I knew. Pity it came too late in my racing career.

[katinas]

........what is?

The spirit of Rashleigh was flying through, after 200 years, from Sir Walter Scott novel.

[SwePatrick]

I have been simulating for hours for my friends 98cc minarelliengine.

One thing that amases me is section 2 on this printout.
Everytime i add a 'square' piece in the header it gives me a boost in power.
And almost everytime it raises the whole curve(and previous projects have shown the same in real life dyno)

By adding this i can run harder tapering on section 1 and 3 to acheive the same 'medium' tapering as a long header that replaces 1.2.3 sections would have to meet cylinder and section 4.

Anybody noticed the same?

Rgds

[katinas]

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Thanks, very nice.
Interesting, how flow restrictions, at partly opened black parts, influence engine performace before full throttle.
Maybe, would be some difficulties with jetting at partly opened throttle ( if not with EFI )

[Muhr]

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Love it! The thoughts run away to what you can do if you can control them individually over rpm

[emess]

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Great! 2T innovation at its very best

[crbbt]

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I've been wondering lately if that would be enough of a restriction (out of the power band) to be able to run without the inlet disc properly

[TZ350]

I've been wondering lately if that would be enough of a restriction (out of the power band) to be able to run without the inlet disc properly

I think it will still have a conventional rotary valve. The sliding gibs just change the timing and throttle the opening.

[Frits Overmars]

I have been simulating for hours for my friends 98cc minarelliengine.
One thing that amases me is section 2 on this printout.Everytime i add a 'square' piece in the header it gives me a boost in power.
And almost everytime it raises the whole curve(and previous projects have shown the same in real life dyno)
By adding this i can run harder tapering on section 1 and 3 to acheive the same 'medium' tapering as a long header that replaces 1.2.3 sections would have to meet cylinder and section 4.

The long header replacing sections 1, 2 and 3 would have 34 mm initial diameter, 48 mm enddiameter, 175 mm length and 4,58° taper, right?
With this taper, the diameter at the end of section 2 would be 41,6 mm. Substituting section 2 with a parallel piece of 38 mm tubing has the effect of locally denting the taper and lowering the Helmholtz frequency.
Without knowing anything about the engine I suspect that the header taper may be too steep and the Helmholtz frequency too high, and it would require a lot of ignition advance to get the frequency of this pipe where you need it. But of course much depends on the chosen exhaust timing and resonance rpm.

[Muhr]

yet again what is this video supposed to show? that you are able to mount a gopro (judging by the quality like first gen one) to a kart?

can't be a ryger engine? no 30.000 1/min, not crazy fast...about the laptime of a Rotax Max (https://www.youtube.com/watch?v=OKh_hRzQy4w).

let me guess, we need to be patient just f*** off...

0.6 sec slower than a rotax

[SwePatrick]

The long header replacing sections 1, 2 and 3 would have 34 mm initial diameter, 48 mm enddiameter, 175 mm length and 4,58° taper, right?
With this taper, the diameter at the end of section 2 would be 41,6 mm. Substituting section 2 with a parallel piece of 38 mm tubing has the effect of locally denting the taper and lowering the Helmholtz frequency.
Without knowing anything about the engine I suspect that the header taper may be too steep and the Helmholtz frequency too high, and it would require a lot of ignition advance to get the frequency of this pipe where you need it. But of course much depends on the chosen exhaust timing and resonance rpm.

Yes, to be exact 4.574 total degree on the diam.
It´s a dragracing pipe to be used with methanol, and the taper is 2.287 on the radius.
I have tried milder tapering also, but it seems like the cylinder want quite big diameters on 1st and 2nd diffuser.
If i make those two a little bit smaller in diam, i loose power and the powercurve becomes very 'peaky'.
The timings is 134/134/134/196
And it seems happy with 15 degree advance at peak power, this with 10.57-1 i compressionratio and 1.28 in crankhouse compressionratio.