ESE's works engine tuner

[TZ350]

Its looking good, I am keen to hear how it goes.

[peewee]

thnx for the help wobbly. the cylinder im using now is buggered with the wrong angles so rather than use 5lb of epoxy ill just start over with a virgin cylinder. ill draw some lines and post it to see what you think

[F5 Dave]

Also...
And lastly the NF4 ignition grafted on...
Attachment 289300



Holy Crap I can't wait....

By the way much thanks going to Mike Chandler and F5 Dave for their ongoing intelectual input... They are deffinitely the brains of the outfit!!!

Well and obviously TZ for his GP development profile online.

[Wolfie's Girl]

But of course, much kudos and praise to the team ese project!
This would be a much more difficult project if not for those who have gone before and now share their hard earned knowledge... We stand on your shoulders... Thank you.

[TZ350]

Speedpro clued me into starting a run with the gauges then laying a map over them and the active cell would be highlighted in yellow. He also thought that it might be possible to change the settings on the fly.

I tried it tonight but could not figure out how to change the settings while the motor was running but being able to see which cell needs a tickle will be helpful. I got a few runs in before the dyno battery spat the dummy, I will change it out and have another go tomorrow night.

Not sure about tonight's results but one thing is for sure, my 330cc injectors are too big, I have ordered some smaller ones and its realy a two person job setting the EFI up. I need some way of videoing the screen so I can see which cells to adjust after a run and I can't fiddle with the laptop and keep the bike running at the same time.

[peewee]

hey wobbly one question on the aux exh ports. the cylinder casting isnt very thick in that area. if i made the aux tunnel 100% of the window size then the window wont be as big as i would like. i was thinking make the windows larger but that might put my tunell only 70% of the window. would this be a good idea or try to keep the tunnel as close to the same size as the window ? i thought i read some where with the difference in flow coefficients between window and tunnel it would be ok with a slightly smaller tunnel but maybe i read bad info.

[wobbly]

The Aux tunnel can be alot smaller than the port area at the bore.
This is due to the fact that when you have a big "teardrop" or triangular aux port, most of the effective blowdown occurs when the
flat top edge of this port opens.
So you get alot of flow in the upper 1/2 of the port height due to the big pressure delta at this stage of the piston position.
Then as the lower part is uncovered the flow reduces, and the triangle shape also reduces the interaction with the transfer port opening just below it.

[Flettner]

isn't it interesting, the YZ250 EFI entered the Acerbis 4 hour enduro this week end. It finished well, with no mechanical failures, in fact it ran like a clock at approx 15% less fuel burn.
It's obviously different to look at ( the engine ), not one person acknowledged it for what it is. One guy came over and telling us how great these "old" YZ250's were, he had owned one, he must have stood there ten minutes and didn't even notice it had no carb, I couldn't believe it!
Is this what fourstrokes have done for us, everything is sanitised and the same .

[speedpro]

From working in the bike shop for not a terribly long time I verified that most people are full of shit and don't notice the most obvious stuff. If it's in the brochure - all good. You could probably sell them last years model with new plastic and they'd be telling their mates in the bar how much better this bike is because it has all this new stuff, it's in the brochure. Or guys that "thrash" R1s to Coro'. Thrash?????

It's getting worse as well. As things get more complicated and reliable there's no need to lift the bonnet so to speak, and not much you can do if you did.

[Grumph]

From working in the bike shop for not a terribly long time I verified that most people are full of shit and don't notice the most obvious stuff. If it's in the brochure - all good. You could probably sell them last years model with new plastic and they'd be telling their mates in the bar how much better this bike is because it has all this new stuff, it's in the brochure. Or guys that "thrash" R1s to Coro'. Thrash?????

It's getting worse as well. As things get more complicated and reliable there's no need to lift the bonnet so to speak, and not much you can do if you did.

Agreed - the number of people who come up and say "I used to have one of those" when it's been so changed the factory wouldn't recognise it....

[wobbly]

You gotta realise that the vast majority of punters out there wouldnt know a throttle body from the one Elle has in bra advert signs.

[Flettner]

I think I might!

[richban]

I think I might!

You made it go to good. If it was running shit and you had to spanner it all day then people would be all over it with comments like "yeah nah you will never get it to work with injection mate stick a carb on it". Be happy that it is just working away and no one has a clue. Well done.

[breezy]

found this while looking for methods of cooling , i found it a quite interesting read.

[Drew]

found this while looking for methods of cooling , i found it a quite interesting read.

I admit to not reading the whole thing, but it doesn't seem to be groundbreaking in any way.

It also doesn't have much of a race application, other than drag racing to my mind.

It's also still water cooling. So limited to =<100cc smokers in the bucket racing circles of NZ, in which case a proper water jacket is the best method.