ESE's works engine tuner

[wobbly]

I like being white

[TZ350]

someone do the collected observations of Chairman Wob....

There is an option in "Thread Tools" for down loading the complete text of this thread.

[F5 Dave]

Site upgrade. Mods being added in a day or so. Bottom left corner i think the dark universe option will appear again. I hope.

[jasonu]

Eeeek I have gone blind, everything is black, help how do I get back to the light side??????

Happened to me too. An hour later and normal service has been resumed.

[husaberg]

No idea what you were looking at but I was seeing it on a black background, now blinding white....Swap you.

Shit I just posted a thread asking why and where has the dark zone option gone.....It was under general settings.

oh I see..
http://www.kiwibiker.co.nz/forums/sh...ade-to-vB4-2-2

[jasonu]

Shit I just posted a thread asking why and where has the dark zone option gone.....It was under general settings.

oh I see..
http://www.kiwibiker.co.nz/forums/sh...ade-to-vB4-2-2

Na mate something funky happened. All options disappeared then came back.

[Grumph]

There is an option in "Thread Tools" for down loading the complete text of this thread.

I'm elderly and on slow dialup, i doubt I'd live long enough to print out the entire thread....And just picking Wob's posts, it doesn't as far as i can see anyway, give the full reply/post just the first couple of lines. Context is important too, someone should spend a week or so sorting the questions and answers...You've created a monster.

[husaberg]

I'm elderly and on slow dialup, i doubt I'd live long enough to print out the entire thread....And just picking Wob's posts, it doesn't as far as i can see anyway, give the full reply/post just the first couple of lines. Context is important too, someone should spend a week or so sorting the questions and answers...You've created a monster.

you don't print it you save it, (took less than 30 seconds for me on a set up worse than 50 per cent of nz has)then you put it in word use an advanced find, to search the key words for which ever topic you wish to separate out.
Then you sift through. Sort the wheat from the chaff.
If it was to be done it would need some sort of frame work to start from.
Say a previous book.

12v water pump epic output
https://www.12volt.com.au/
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12VDC 8A Dimmer / Motor Speed Controller

DC speed controllers are ideal for slowing down pumps and motors or dimming lights but commonly use resistance circuits and are very inefficient.

The pulse width modulation (PWM) used in this controller allows you to vary the output from 0 to 100% while maintaining a very high efficiency.

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Dimmer / Motor Speed Controller
MP3209 8A 12VDC dimmer $39.99

[TZ350]

Carburetors are great because of their analog ability to change the fuel delivery with changes in air flow at the same throttle setting.

EFI, well EFI is not forgiving at all.

16 Alpha-N map lines with most of them concentrated in the upper power area of the graph.

Back to the EFI thing. The Ecotrons Alpha-N map has 16 rows to work with and I had concentrated them in the area where the power is, as you do. Well that turns out to be a mistake because there is not much difference in fuel demand per cycle between 100% throttle and 90 or 80 or even 70 at max power and virtual no difference at all above 40% in the 3 to 6000 rpm range.

The big jumps were between the lower throttle settings where there was not much excitement happening, well the mistake is that the CPU has a hard time bridging the big gaps below 40% especially when it is also trying to swap between low and high injectors at the same time.

16 Alpha-N map lines more evenly spread so as to not have any big jumps between them.

Under 35% throttle is pretty unexciting power wise but on the track its a big deal as far as on track drive-ability is concerned. So for the next attempt I am going to use more Map lines in the lower area where things are changing rapidly with throttle position and less in the upper area where things are not changing so much, the power at 80% throttle is not very much different to 100%.

As it turns out, it was a mistake to concentrate my map in the power area, but I guess I will forgive myself.....

[Frits Overmars]

Carburetors are great because of their analog ability to change the fuel delivery with changes in air flow at the same throttle setting. EFI, well EFI is not forgiving at all.

I'd say EFI won't get fooled by changes in inlet timing, reed stiffness, etc; it will keep doing as it is told - by you.

As it turns out, it was a mistake to concentrate my map in the power area.

I would not consider it a mistake at all. It was a ride up the learning curve. Will calling it an experiment make you feel any better?

[Frits Overmars]

Now here's a little teaser. Suppose we've found the optimum balance factor for a certain single cylinder engine without a balance shaft. A lower balance factor would increase the vibrations, as would a higher factor.
Now we fit a lighter piston. This means that the balance factor will increase. But the engine will vibrate less...

the lighter piston will effectively increase the balance factor so the peak forces in the plane of the cylinder axis will be reduced. Thus less vibration in the critical vertical plane of the handlebars - but, by increasing the factor it will now vibrate more horizontally.

When I started reading Wob's reaction, my first thought was: "I should have excluded Wayne from the answerers. He's too good; let the others have a go first".
But I'm glad I didn't. You fell for it, Wob!
You are of course 100% right about the reduced peak forces in the plane of the cylinder axis and the reduced vibration in the critical vertical plane of the handlebars.
But fitting a lighter piston will not cause stronger horizontal vibrations. Yes, the balance factor has increased, but that is just an arithmetic quantity; it's not a force.
The crankshaft's bob-weight masses haven't changed, so neither have the fore-and-aft forces.

How far can we go with lightening the piston (leaving mechanical strength aside)?
Suppose we have a 200 gram piston and a 50% balance factor. So the bob-weights generate a force of 100 gram (OK, 1 Newton. And yes, all these forces will be umpteen times larger than 100 gram because of inertial effects, but that does not alter their mutual ratios, so I'll leave the rpm aside and just quote the weights).
There will be free vertical forces of 100 g upward and 100 g downward, and there will be free horizontal forces of 100 g forward and 100 g rearward.

Let's fit a 150 gram piston. That means the balance factor will become 66,7% (100 g bob-weight force / 150 g piston force). The free upward and downward forces will be 150 -100 = 50 g; half of their original values. The free horizontal forces remain unchanged at 100 g.

Now let's fit a piston that weighs only 100 gram. The balance factor becomes 100% ; the upward and downward forces are completely neutralized by the bob-weights, so the vertical vibrations are completely gone. The horizontal forces remain unchanged at 100 g.

Only when we fit a piston that's so light that the balance factor rises above 100%, will the free vertical forces start returning - but now in the opposite direction.
Now it's no longer the piston that causes vertical vibrations; it's the bob-weights. That is because the vertical forces generated by the bob-weights are no longer completely counteracted by the vertical piston force. And those bob-weights also keep causing their original horizontal vibrations.
The chances of fitting a piston that weighs less than half of the original piston are slim. However, my friend Dolph van der Woude designed a beryllium piston that would do the trick....

[wobbly]

Thanks Frits, its the case of the smarty pants ( clever clogs ) sucks in, the big mouth.
Think before spouting would do some good, as of course the bob weight hasnt changed so the horizontal force is still the same as previous.

[TZ350]

2T dyno porn.......



EFI 125 .....

Like mine it runs well at high rpm and has good throttle response in the high power high rpm area but we don't get to see if it has on track drivability, Ie good low throttle lower rpm responsiveness.

[TZ350]

This one seems to have more throttle response.



Initial start of the Yamaha 600cc Two stroke twin snowmobile engine project with custom fuel injection system.
2013 Students built this project from scratch in 2 months using the Performance electronics ECU, R6 throttle bodies, Toyota camry crank trigger wheel, MT01 gas tank. Running COP coils, 45 PSI rail pressure and Vector driveline. This project will be the test bed for a future closed loop fuel injection system using type K EGT probes.


2T LPG fuel injection:- http://youtu.be/4AAw-H_A93I

Development of an autonomous model based real time controller for a LPG fuelled two stroke barrel injected SI engine http://youtu.be/JexgKNrg01w

DIY Electronic Fuel Injection EFI 2 stroke:- http://youtu.be/WHXl9hI1bj4

Mercury 2.5L 2T EFI dyno Test:- http://youtu.be/Zj7aO2DFvE8

Ultra compact micro fuel injection system for small capacity 2-stroke engines. http://youtu.be/vZ88vqAy3cM

motore a 2 tempi con iniezione diretta DFI... http://youtu.be/XIcX9-GsMGQ

Simulations of Direct Fuel Injection:- http://youtu.be/PPOVgaJjQLg

[jonny quest]

OEM tuners on tps go like... 0 4 6 8 10 12 18 25 35 50 60 70 80 (roughly). When you start getting over 33% tps the throttle blade open area doesn't change as drastically. Google Honda PGM CRF tuner and view pics. I'm sure you'll find the tps % they use.Probably a good start point