ESE's works engine tuner

[wobbly]

Yea well Niel you arent the average punter - with a CNC machining centre your shed.
But the others dont realise the only commonality between Elle and a throttle body is that there is a hole in the front, and one in the back, one for IN the other for OUT.

[F5 Dave]

Well, technically there's two in the front (ignoring impossibilities) & even on your birthday I don't think Elle would oblige.

[wobbly]

So they are the same - the throttle body has a fuel rail inlet, but even in my sad case that would be an impossibility.

[F5 Dave]

When she first launched her adds back in, erm late 80s? there was a 20' long reclined Elle plastered on the James Smith building. Quite a sight, but there were apparently some complaints, not least about the homeless drunks standing opposite in Cuba mall furiously shaking their trenchcoats.

[Flettner]

I suppose I'm just saying, back in my day ( I'd like to think it's still my day ) if there was even the slightest roomer of something a bit different in the pits, we would be all over it, you know, like the proverbial rash. But hey times have changed it would seem, Elle.

[F5 Dave]

Buy the latest Metal Mulusha sticker kit old man

[husaberg]

I remember the Poloni power head From Robinsons book did anyone ever use it in competition

Not at Aprilia. I seem to remember that Team Roberts once tried variable comp heads on the factory Yamaha 500s, but the name Poloni does not ring a bell.

I spelt it wrong too i guess "Polini" powerhead

Seen this today....
Also nice illustration of the Rotax Pneumatic powervalve.

Don't read this Wob its for Rob.......
http://edj.net/2stroke/jennings/webc...r%20Hodoka.pdf
http://edj.net/2stroke/jennings/

[chrisc]

I have infiltrated the ESE headquarters and successfully spied on their operations.



"Now there's your problem"


Preparing #21 for the 2 hour


I also had my slug FXR on the dyno for a while and tried to bring her to her former glory.
See here for result

[TZ350]

Good news, I am expecting to see my new Injectors here tomorrow or Monday so it will be back onto the dyno next week.



After the chop job on the frame I have 22.5 deg rake and hopefully 19mm of trail.



Working on getting engine positioned in the frame and the Squat-Anti Squat sorted.

[husaberg]

91mm trail.........i hope

[TZ350]

91mm trail.........i hope

Eeek erge ooops yes .....

[TZ350]

The 25 Demerits was because Emma found the bike in the workshop during business hours, get a 100 and you have to shout morning tea all round.



Working on getting the engine positioned, the MC18 is a little longer than a RS125 and I have been able to get the engines crank much the same distance from the front axle as a RS so hopefully that will translate into ideal weight distribution onto the MC's front wheel. The stainless tube represents the chain run.

[F5 Dave]

Maybe a thinner header section for more clearance? Or stronger string.

[TZ350]

Maybe a thinner header section for more clearance? Or stronger string.

Should be good I recon, as its that special yellow and green vibration absorbing string, but thanks for the heads up, plan B, hammer some clearance into the header.

[husaberg]

Try putting the venturi directly behind the slide like Lectron did - this will shorten up the divergent length with much slower angles out to the RV port area.
Easy to test the flow capability of the varying venturi positions and divergent angles on a flow bench before hitting a dyno.

Yes, make it into a bellmouth. That will get you both a shorter unit and a better inflow. You might also consider putting the restriction in the bellmouth if your rules allow it. That would mean you can have a considerably longer trailing ramp (the widening can start right after the bellmouth, i.e. under the throttle slide). It also means that only the air, not the fuel, has to pass through the restriction. That way the total mass that has to be accelerated through the restriction, will be about 8 % less.

Attachment 256967

This is what my ventori tube looks like, flow is from left to right, two ramps, leading ramp is 34 deg included and trailing ramp is 14 deg included angle.

Could the flow be improved by making the leading edge ramp into an aero foil shape like the leading edge of an aeroplane wing as in your picture.
It would certainly shorten up the tube and get the venturi point closer in behind the slide.

seen this yesterday, i edited the Valves out and added some ports.
Cameron