ESE's works engine tuner

[jasonu]

That would only be ironic if you'd bet that you wouldn't.

The less you bet the more you loose when you win.

[breezy]

Non-Diclosure Agreements don't go away easily, Breezy. They stipulate two involved parties and a period of time, usually several years. And they stay in force as long as both parties exist. I would have to die in order to get out of an NDA and I'm not prepared to go that far. Or I could shoot the other party, but that might have consequences as well.

ok.. thanks for reply.. but you just got to ask.. not a case of " walk and dont look back", then

[chrisc]

Ryger dealer, O.W. Karting: https://www.facebook.com/profile.php?id=100010751910350

[Frits Overmars]

ok.. thanks for reply.. but you just got to ask.. not a case of " walk and dont look back", then

The prototype I drove still deserves attention. As for the organisation around it... .

[Haufen]

Just stumbled upon a measurement aid I made a while ago.
Just print, fold, cut and compare to the mold when it leans flat against the piston. The numbers are in degrees from horizontal. Combine 2 of these for boost port measurements.



PDF file:


(the angle of the port in the picture is not exactly 15 degrees, but not 20 either)
Let me know if you should not be able to download the PDF file, it shows as a black rectangle in the preview but can be downloaded by clicking on it.

[TZ350]

Looks Good .....

[wobbly]

You cant show a piston with a pin plug and not have me ask what, where, who, how much.

[peewee]

hey guys I still been poking away at this thing as time allows. got one half done and hope to finish the other half in the next couple days. im fairly happy with how it turned out, considering what I started with. increased the window area quit a bit and added some nice tea cups. the rear stud area is pretty thin but I have a idea to possibly gain some more window area on C, but ill have more details about this question later today or tomorrow. of course I want to run this idea/question by wobbly, frits and some of you other guys first before I start grinding. any ways heres what I ended up with

from left to right. A,B,C

[Lightbulb]

Well, we have embarked on trying to learn more about the 2.5 cc speed glow plug engines and making data acquisition board small enough to fit in the model plane as well as transit in real time to a cell phone the info. I have made a newer version of our egt thermocouple, and have a thermistor for head temp and using an accelerometer to get both engine rpm and model speed when it flies.
Still have to get the data board re programmed to output the average rpm to +- 50 rpm. Currently it's still at +- 120 rpm.
We are seeing with the 2011 engine the egt is about 480 C to 490C or so when it is running at what we think is right. When it runs lean it goes to 518C and the glow plug has failed at that point. It is good that the new thermocouple is still showing the same temp values as the prototype thermocouple that had failed after only 4 runs or so. The head temp is about 140C to 160C as it leans out, the head temp goes up really fast to over 200C and more. The thermistor we are using is really not rated for the higher values so are getting a higher temp rated thermistor. We were not expecting to see temps over 200C Attached is pictures of the egt test set up.
The latest we have done is to make a spark and record that sound in the pipe to see what the wave form looks like. We have seen that some pipes have 6 major harmonics and others have 8 major harmonics or more. So 2 pipes that looked the same showed quite a different frequency response. The slow pipes showed a frequency response that would equate to the engine running at 38400 rpm, which is what it does on the 2011 engine. The other pipe that showed a frequency response that would equate to the engine running at 39400 rpm . And that is what the 2011 engine does with that pipe. It was good to see that we could identify the slow pipe to the normal pipe. The faster pipe showed a frequency response to that of 40k rpm and that pipe has a very different frequency response signature to all the other pipes. It is also the most beat up junk looking pipe we have, but does perform the best on the engine.
I have attached some pictures of the best performing pipe and the std good looking pipe.The graphs of the pipes shown is Comparing Two Pipes.jpg There is also a graph of the pipes for the N40 F3D engine. Red Standard Blue Flat.jpg is the frequency response of these pipes, a standard pipe and the same pipe with a flat on the tailcone. The other graph of the F3D pipes is Green-Std Magenta-flat red-blue flat-muffler.jpg, this is the overlay of standard pipe, the pipe with a flat , and the pipe with a flat with the now mandatory muffler. Not entirely sure of what we are learning from this, but it is early days in this testing and analysis.

[wobbly]

One small detail everyone seems to forget.

[Lightbulb]

the other egt test pictures F2lemetry is what we see on the cell phone screen in real time from Carl's Data board that will be in the model plane.

[chrisc]

You cant show a piston with a pin plug and not have me ask what, where, who, how much.

This^ !!!!!!!

[breezy]

the other egt test pictures F2lemetry is what we see on the cell phone screen in real time from Carl's Data board that will be in the model plane.

Looks like you will be able to predict best full load running scenario with real time acquired data, giving you a major "hit the ground running" advantage over other set ups... got to be highly sort after

[Frits Overmars]

the rear stud area is pretty thin

You can say that again Peewee. You could add material to the cylinder, pulling the rear stud tunnels higher up, but you could also avoid the welding job and put a girdle on the head instead, like this.

[DaisyB]

To me this bit, sounds like Unburnt fuel.
It take a bit of time to clear.
the Cagiva 500IE was never able to dial it out.
Pumper carbs do the same thing as they keep on pumping where the throttle is open or closed.
This can be dialed out with a bleed and a one way valve, i sent you a handwritten explanation that jennings did on the Bridgestone about 5 years ago.
Try doing you run but not shutting off completely or blipping throttle.
Can the injection be set up for auto blip in conjuction with the ignitech and a servo?

Could you explain how to do this on the pumper carbs? Having a fun time trying to dial out the over-run richness - at least it's on a combo, so when it does clear and spin the rear wheel we don't fall off!