ESE's works engine tuner

[TZ350]

Have you seen this one Ken
its a tiny high ultra pressure pump.
https://www.popularmechanics.com/car...tors-15682450/
https://news.engin.umich.edu/2012/09...sions-in-asia/
have a look at the fuel spray

kind of reminds me of a hilborne system only electric
http://www.freepatentsonline.com/20140117121.pdf

The Uni students all in one motorcycle EFI system looks pretty good, brilliant even and the voice coil injector is a great idea, I love it.

[SwePatrick]

Still testing clutch, now i´m happy.
This tune is good as now i can add springs or loose weights on the clutchfingers to gain different results, more rpm, harder engage etc etc.
The tune in the video is a grandma tune

Yes i have been lazy,, tied up the silencer with a rope, it got loose.
And in front the shiftcut box is hanging by the loom.
I´ll fix that tomorrow.
And this weekend i´ll try to tune the engine some also(dyno)
It is last years tune that i did for the old setup.

[wobbly]

Using a voice coil system to create the injection fuel pressure ( amplitude and frequency controlled by an ECU ) will infringe a key part of
the Etec patent.
This is the basis of the whole system as used by Evinrude and SeaDoo , im sure they will spit the dummy if their mega expensive licencing is infringed
by attempting to use this commercially.

[husaberg]

Using a voice coil system to create the injection fuel pressure ( amplitude and frequency controlled by an ECU ) will infringe a key part of
the Etec patent.
This is the basis of the whole system as used by Evinrude and SeaDoo , im sure they will spit the dummy if their mega expensive licencing is infringed
by attempting to use this commercially.

Unlikely a patent has been issued.
http://www.freepatentsonline.com/20140117121.pdf
https://patents.justia.com/patent/9500170

I cant see Etec in citation either i assume you are refering to this one?
If it is the one Etec is Piezo?

US 4610427?

was it patented by
Yoshinaga, T.; Igashira, T.; Sakakibara, Y.; Abe, S.; Natsuyama, Y. ?

[peewee]

Still testing clutch, now i´m happy.
This tune is good as now i can add springs or loose weights on the clutchfingers to gain different results, more rpm, harder engage etc etc.
The tune in the video is a grandma tune

Yes i have been lazy,, tied up the silencer with a rope, it got loose.
And in front the shiftcut box is hanging by the loom.
I´ll fix that tomorrow.
And this weekend i´ll try to tune the engine some also(dyno)
It is last years tune that i did for the old setup.

nice work mate. let me know where you sort out the clutch. I also have a finger style that im installing on my Yamaha. I understand the idea how it works but ive never spent a day tuning one. my biggest hurdle might be finding the correct initial weight for the fingers. after that, I shouldn't have much trouble. ive only got weight to worry about, no springs

if you give some nitro a go, you may never go back to straight methanol again . even if everything isn't perfectly tuned, you still gain power. but take caution because it can be explosive even at just 10%. it nearly blew my decompression valve off my other head

[Flettner]

Oem Kawasaki KX250 with mods and Polini petals
New V-force is bad,, the petals are getting soft, the resin dissolves.

I tried a boyesen cage with polini petals, no good.
There´s no rubber coating so the petals lands so hard it smashes them.

what are the polini petals made of?
Vforce ? cage get soft also?

[lohring]

For no particularly good reason I've been exploring the idea of a piston ported cylinder with a boost port for a 26 cc engine. I know it's been done before, see below. My design looks weird and simulations don't show any power gains over a cylinder with no boost but a wider B port. Of course scavenging isn't being modeled. Any thoughts or other ideas?

Lohring Miller

[Haufen]

Any thoughts or other ideas?

Don't do it. The BP is the least useful port of all. Focus on B instead if you can choose. I once blocked the BP out of curiosity, and other than half a horse or so (which could be related quite well to the then reduced transfer TA) nothing happened.

[SwePatrick]

what are the polini petals made of?
Vforce ? cage get soft also?

Just petals got soft, but i actually never checked the cage carefully.
It´s the resin in V-force petals that becomes soft, i mailed them and asked, they confirmed.

I dunno what resin polini uses, but they work,, good enough

[SwePatrick]

Today´s progress: FAIL!

Well, one should always be prepared for disaster, and luckily i am so no tears here.

I finally put it on the dyno, engine felt really crisp and fresh, good throttleresponse etc etc after a long warmup.
I made some smaller pulls with no recording just to feel how it behaved with the clutch.
All seemed fine so i was about to make a 5000-11000rpm pull to let it cool down and do it again a couple of times.

But,, at the first pull i noticed at about 10500rpm that it had a small waterleak around a headstud.
BAM!!!! just the tenth of a second later a hose i have plugged to be able to vent out the air when filling with water as the radiator is lower than the cylinder came loose.
I got myself a hot shower on my chest and face, luckily no damage on me,, just hot.
But engine coasted down as i was spitting out the water from my mouth.

It had protruded water into the cylinderbore, and made some smaller scoring on the fresh nicasil.
Maybe it is possible to diamondhone it and use it again, i´ll check that later.

Why did it happen?

i got three enginemounts the lower one underneeth the engine had cracked and when engine hit the torque the engine tilted upwards, the only thing that kept it from rotating was the upper mount, this is mounted in a bracket on the head.
It had actually 'moved' the head some, this probably because i torqued the head only with 15Nm as i was about to torque it again after this pull when it was hot.




Well well,, i´ll be back, it sounded just to good to give up now

[TZ350]

Sorry to hear about the disaster......

When we have disasters we say to ourselves, at least we know the formula because the formula is often more valuable than the damage discovering it.

[peewee]

may i ask, you ethanol / methanol junkies, what reeds are you running?

for atleast a year i been using carbontech. i think its a subsidiary of boyesen. already 1gal nitro and many gallons methanol and they still seem fine . they can also make custom orders
https://www.carbontech.com/

[TZ350]

I have been making progress with the simulated MAP idea.

I have abandoned my original idea of using a MAP sensor to see the high and low pressures because MAP sensors are too slow and instead will use a piezo element.

EngMod2T simulated crankcase pressure traces.

Because all the peak pressures all line up at the same crank angle I have embraced Flettner's idea of "sample and hold" by making only one timed measurement at peak pressure and using that for the complete cycle.



I have been able to use some PC based software to generate a simulated ignition trigger pulse and crankcase pressure trace for my software's test and development purposes.



The code is pretty simple, an interrupt triggered by the ignition trigger pulse at which time it waits about a third of the duration between pulses and then samples the crank case pressure. The loop writes the simulated MAP output signal that then goes to the EFIs CPU.

Simple code but it took a while to get it and my test setup to work reliably over the full RPM range.

[Flettner]

diesel is dead to me. Are we allowd to talk diesel here?
Last diesel ute I had would do just on 1200 km on a tank full of fuel. New diesel ute (same ute just new) gets just on 900 km per tank full, same size tank. Turns out new ute has a partical filter where as the previous one did not. 300 km worth of fuel per tank wasted just to run this filter. WTF?
How soon before Mazdas HCCI are here? How soon before we see HCCI powered utes, I'll be trading this bugger on one.
So what about all the extra CO2 released just to run this filter? Good for the enviroment, I don't think so.

[speedpro]

Less particles, more CO2