ESE's works engine tuner

[RomeuPT]

Can't you see that the orange 40.6 Nm torque curve has a higher maximum than the red 47.6 Nm torque curve? And that the orange maximum torque is not produced at 8500 rpm as the text says, but at 7500 rpm? And that the red maximum torque is not produced at 8250 rpm but at 7000 rpm? And that the quoted rpms for maximum power do not correspond to the graphs either?

Yes, I have seen that. I was just looking at the graphs and not the numbers bellow, big bullshit, does anyone have a decent ktm 250 dyno graph?

[tdc211]

Frits, what do you think on the raised exhaust floor and comparing it to overlap?
I know I can not compare a 2 to a 4stroke. But it seems to act like overlap when floor is raised.

[motoholic71]

I reason what could be happening is that the top half of the exhaust port is where it all happens so raising that "useless" floor results in less volume of the port which improves cylinder/exhaust gas exchange.Why I don't know.Speed?
I thought valve overlap is to transfer the exh. inertia to the intake, help clear the cylinder and control exh.valve temp.
The question was not addressed to me I know But I couldn't understand the relation of port floor and 4 stroke valves,so I posted my take to see if I got it wrong
Also would like to know what could happen if a raised floor port is implemented on a exhaust valve cylinder, will it conflict the valve effect?
Any ideas,Frits, Wobbly, or anyone?thanx


Just 1 last q.:
anyone knows average running power consumption or current draw, and total system weight of an Ecotron or similar 2 stroke EFI ?
Thanx,very interesting Keep it going please

[tdc211]

[QUOTE=motoholic71;1130598286]Also would like to know what could happen if a raised floor port is implemented on a exhaust valve cylinder, will it conflict the valve effect?


That was done a while back on here with a graph and yes it does, or is the valve conflicting with the floor?
I just asked this cause this engine required less timing at lower rpms after raising the valve with a raised floor.
In the end I had more cylinder filling/less short circuiting at these rpms.

[TZ350]

We have had a TF125 on the dyno today, green line is the base run, red line is dropping the main jet from 230 to 200 and blue line is opening the air correction jet out to 1.1mm and back up to a 240 main jet. Just shows that the air correction jet is worth looking at.

[husaberg]

We have had a TF125 on the dyno today, green line is the base run, red line is dropping the main jet from 230 to 200 and blue line is opening the air correction jet out to 1.1mm and back up to a 240 main jet. Just shows that the air correction jet is worth looking at.

I am a bit torn myself the oko's seem to be a leap ahead of the old PJ Keihins. as bucket mentioned above most of the Keihin tuning was on the taper only as the needle jet system was an integral part of the carb and not available as a separate part hense the frustration of tuning a worn Keihins where fatter needles with differing taper's were required to compensate for worn carbs.
But Tz seems to have it close and adjusting the air correction jet is quick and easy esp if it is tapped for a jet and would seem from the symptoms Rob describe to be worth a go because it will affect the area of carburation that rob says is out.
Oh fiddling with the Air correction is something practically every one who had a decent running Rotary Mazda had to do to their IDA Webbers.


PS doesn't the evil empire own Keihin as well as Showa

10 carrots

I am keen to see that ball valve working on your 125. I like the boost bottle idea, best way to beat that restriction so far.

My thoughts based on gut instinct is the boost bottle would be quite beneficial esp with the restricted size carb.
I hazard a guess that it would be more beneficial than the original plenum certainly it should be a lot less problematic with the fueling.

.

[jasonu]

:

, does anyone have a decent ktm 250 dyno graph?

Probably not on a Buckets tuning thread.

[TZ350]

Great Day at Mt Welly, fine and sort of warm. Team ESE rider Rick52 peddling his RS/TF125 took both A grade wins, and Tim on the 50 he is developing was going quick enough to keep Dave D, honest. Garry on a bike sporting a cylinder and head from Speedpro holds the lap record in both directions. FarmaKen had a good day with his MC18/TF125 but packed up early to get back to Rotorua. Its good to see some more 2-T's up the the front of F4.

http://www.kiwibiker.co.nz/forums/sh...post1130599037

[goose8]

Any video of today's a grade racers just wondering if someone got my high side save coming out of the infield? Number 3

[kel]

Any video of today's a grade racers

There was a drone hovering above the track for the A grade races, Im guessing it was being used for video as it didn't seem to take anyone out?

[Rick 52]

Great Day at Mt Welly, fine and sort of warm. Team ESE rider Rick52 peddling his RS/TF125 took both A grade wins, and Tim on the 50 he is developing was going quick enough to keep Dave D, honest. Garry on a bike sporting a cylinder and head from Speedpro holds the lap record in both directions. FarmaKen had a good day with his MC18/TF125 but packed up early to get back to Rotorua. Its good to see some more 2-T's up the the front of F4.

Absolutely over the moon with today's results, Im glad I could give the ESE team the results they deserve with All the hard work they put in to help me get the best from the bike

[speedpro]

The engine in Gary's bike today was basically made up of pieces from his and Dave's motors I had lying on my bench. The cylinder is a barely modified H100 and really pretty horrible. Gary does like that bike though and seems to have it well set up.

Big thanks to Gary as well. My son's bike is making a noise I need to investigate and Gary offered his bike to Cricket. Cricket's comment when he came in after the first ride is that it was better than his bike and he liked it. Looks like another 2T convert.

[speedpro]

How flash is bucket racing now, we have our own clothing label, WiFi for live race results is available in the circuit for those with smart phones and ipads etc, and we have a drone recording video. I'm thinking our own brand of port next!!

[wobbly]

I have not tried to do an MX design for a 250, only fully ported Open class 250 karts.
We ran 1080 pipes on these but i found no advantage in steep angles that ended in anything fatter than 135, and besides I doubt even that diameter would fit on the bike.
A belly that fat on the MX ported setup I believe would overscavenge and loose important low/mid power for little gain in top end that is hardly used during a dirt based race.
Here is a comparo of 250 - 2T and the 4T competition, showing what is needed to be competitive.

[Drew]

I have not tried to do an MX design for a 250, only fully ported Open class 250 karts.
We ran 1080 pipes on these but i found no advantage in steep angles that ended in anything fatter than 135, and besides I doubt even that diameter would fit on the bike.
A belly that fat on the MX ported setup I believe would overscavenge and loose important low/mid power for little gain in top end that is hardly used during a dirt based race.
Here is a comparo of 250 - 2T and the 4T competition, showing what is needed to be competitive.

By crikey those Austrian mofos have their shit in one sock!