ESE's works engine tuner

[husaberg]

Another simple and more clear looking way to show whats on a monitor screen is to press and hold the Ctrl button on the keyboard then press (just once) the Print Screen button on the keyboard (while still holding Ctrl), then open Paint click Edit Paste, voila there it is, click Save. Then its full size and crystal clear for all.

You don't even need to push the ctrl button, just the print screen then right click and past into word or publisher or any other program.

All these were screen printed off a site that doesn't allow saving pictures

Yamaha 3 cylinder racers
I haven't even read them myself yet

[2T Institute]

Re the thermo spigot sizes.


TeeZee, something is very wrong when you have 0* advance at 13,000 peak power rpm in that 50 engine

...........and 21* max advance

[peewee]

Re the thermo spigot sizes.
I have run essentially the same setup on a RZ485 with CPI Cheetah cylinder making 104RWHP on unleaded.
The head outlet size is 19mm OD /16mm ID,and this fits all the LC/RZ style twins.
As the thermo is on the high pressure side of the pump the return hose size makes very little difference as the biggest ( smallest area )
restriction is in the fully open valve plate in the thermostat element.
BUT here is a tip - going up in size on the suction hose from the rad into the pump,with a bigger spigot welded onto the pump inlet ( 25mm hose )
makes a big difference to the flow and cooling.
Having said all that its easy enough for me to change the 3D models for Leonardo Flettner to CNC up a bigger one off body.


TeeZee, something is very wrong when you have 0* advance at 13,000 peak power rpm in that 50 engine

the head I have measures 21mm OD at the spigot. 15mm ID but ill probly ream it out to 16mm. im guessing the hose ID is 19mm although I haven't got the exact hose to measure but I tried a 19mm ktm hose and it fit good and tight. I would prefer the thermo spigots OD to be more like 21mm or so and the ID 16 or so, atleast on mine, if its not to much trouble


spigot going into the pump is 25mm OD and 19mm ID on the one I have

[adegnes]

RVP, is something of a hobby horse of mine at the moment.
Forever, so many people have had big issues with deto in KZ2 kart engines, and after reading several references in DynoTech magazine
about the effects I decided to do a test.
I ran our SKUSA Honda125 on the dyno one morning on fresh Avgas.
From a huge number of track tests where I have recorded the Altitude Density ( RAD ) and the egt, I have a straight line jetting chart that I know is
absolutely accurate.
RAD = 97% = 165 jet,I can simply go ahead with that and be tuned perfectly.
The baseline run gave the exact result as I would have expected,with the egt smack on 1340* and the deto first red light flickering at peak torque.
I left that fresh fuel in the dyno tank, with its normal breather to atmosphere sitting overnight.

Luckily the RAD was exactly the same the next morning, so I reran the test,and holy shit it was a complete surprise.
The egt had dropped nearly 100*F,with no changes whatsoever.
The power was down dramatically ,like 2 Hp in just over 40.So I leaned it down as you would - trying to regain the power and the egt number.
But as I leaned down, the power DROPPED, the deto lights started to warning flash,so I stopped right there.

The light front ends had all flashed off from the fuel, and as the DynoTech articles had said,the fuel simply wont vaporize entering the crankcase - it flows into the engine as big globs.
The globs dont burn efficiently,thus dropping the egt, and power simply goes away,badly.

I think I stated on here before that at the SKUSA World Finals this year we were allowed to use the 98VP racegas,or VP C12,a WAY better high octane race fuel.
For some reason we simply could not get the C12 to work on track,so I went to the VP race truck and asked them could they open a brand new drum of C12 for me.
They did, and completely the reverse to what one would expect, as the lid was unscrewed,NO vapour pressure went WHISHHHHH.
The fuel had No RVP ie it was "off" ie useless.
C12 has a published RVP of 9psi ie it should woooosh like hell.

The short of the story is that not only does fuel degrade VERY quickly, causing deto if left even overnight - hard starting in cold weather would be super likely if the light fractions wont vaporize and give
the engine something to actually burn, not drown on.

Thanks!
When I think about it, this explains how it can act lean while at the same time be dripping fuel out the exhaust to...

[Lurifax]

This side of world it is ALT + PrintScreen that prints only the active window.

Ctrl + PrintScreen is the same as PrintScreen and prints the whole screen in my computer

[MotleyCrue]

You don't even need to push the ctrl button, just the print screen then right click and past into word or publisher or any other program.

Thanks that could be handy.

[TZ350]

Yes, I have been trying some of these tips, very handy, thanks.

[sitkuura]

http://www.pit-lane.biz/t6315p300-2s...-engine#294442

[nasone32]

Although i respect Jan Thiel, I don't like comments based on a friend's telling.

[Haufen]

Although i respect Jan Thiel, I don't like comments based on a friend's telling.

Neither do I.
Unfortunately, that is all we have on the ryger, there is not a single fact, just tellings, and now both ways.

On the other hand, maybe if it looks like fish, smells like fish and tastes like fish then, you know, maybe it's just fish. After all, 30ish hp is what one would expect from a 125cc engine with reduced pumping capacity and a single exhaust port.

[MotleyCrue]

Neither do I.
Unfortunately, that is all we have on the ryger, there is not a single fact, just tellings, and now both ways.

On the other hand, maybe if it looks like fish, smells like fish and tastes like fish then, you know, maybe it's just fish. After all, 30ish hp is what one would expect from a 125cc engine with reduced pumping capacity and a single exhaust port.

I have wondered for sometime why Ryger didn't have both Frits and Jan onboard. Maybe it was for financial reasons or some other reasons but in hindsight I think it would have been best for all.

[SwePatrick]

Although i respect Jan Thiel, I don't like comments based on a friend's telling.

If it is some truth in that statement it all lines up with the bad design of transfers(in my eyes).
And makes me wonder how on earth Frits could have been sweettalking so much?

Let´s hope it´s just bullshit.

[MotleyCrue]

Yes, lets hope the 70 HP and Frits's fast ride in the kart was not done with some kind of spiked fuel, and that all that needs to be done is a bit of ironing out of bugs. But if the engine made 56 HP a few years ago before any of this 70 HP stuff came about it would seem like it could at least make 56 HP again.

[wobbly]

Here is a pic of the thermostat lid spigot.

[peewee]

sounds to me like jan is still king and rsa is still most powerful 125 on the planet