ESE's works engine tuner

[jasonu]

Funny where youtube surfing can lead one, this is where I ended up the Crecy vid:

http://www.youtube.com/watch?v=bKHz7wOjb9w

Cooler than a Bucket.

[Flettner]

The beads and bondi fill are spreading.

[TZ350]

A great day for the 2013 Two-Hour Moto4 (Bucket) race.



The Team were keen.



Av and Glen posted good super pole times, 29.297 (ant clockwise).



The winners were Dave and Nathaniel Diprose father and son team on their quick little 2-stroke with at least 20 consecutive laps in the 29's.

Av and Glen finished second on the Team ESE machine from the Dark Side.



The hard luck prize has to go to Gavin, running second for most of the race until five minutes from the end when the metal termites ate their way out of the crankcase.

[TZ350]

Another good Team showing was Rick52 and Henk, fifth.



The line up for the start.



The tyres got a good workout.



There were a lot of smart looking bikes.

[speedpro]

Any tips on this?

I've not had much luck getting a Jaycar kit one going well.
It's OK to a point but stops working at 10,000 rpm.

I've tried up to from .47 - 3 uF in the main capacitors but it doesn't seem to make much difference.
I guess the triggering side might be a bit shit. What did you use to switch it?

Triggering side would be my guess, some sort of pulse width problem, or . . . . . . mybe it's some sort of default rev limiter. Something that limits the rate the input resets ready for the next trigger. Look for an RC circuit controlling a latch.
I used the original Suzuki AC50 points to trigger the CDI through a debounce circuit. We ran it up in the bay using a signal generator and upped the speed until the capacitor charge pulses looked like a picket fence on the scope, it drew about 10A from the power supply. The output didn't drop 1v. Spark rate was equivalent to a V8 at 16,000rpm if I remember.

[husaberg]

Someone once said the Oval piston NR500 sounded exactly like a two stroke v4 500 as it was revving 2x the speed and the frequency was the same never heard one so not sure come to think of it never seen let alone herd a nr750.

Huh? How could a four stroke NR500 ever sound like a two stroke NSR? If any thing it would sound like 2 VFR400's

I guess because it was because it was running at 22-28000rpm depending on who you ask fredy say 22 some net stuff says way more 28 .
It still only had four cylinders . I just assume its a frequency and pitch thing.Or it could be crap I don't really know. Not sure of the firing order they ran or the pipe configeration either.The valves I would think would take the sharpness out too maybe this is less with a 8 valve head. Crikey I don't know, but a cbr250 at 18000 don't sound like a nsr250 at 9000 either.I looked on the net and can find nothing about the sound of it other than most resembled a nr500. Maybe try playing a audio of V four for victory at 2x speed as an experiment as the NR500's are a bit thin on the ground around here. Mine needs a rebore but I cant find any o/s rings for it. The Honda dealer says........
http://world.honda.com/MotoGP/history/NR500/
http://world.honda.com/MotoGP/history/NSR500/index.html

Yes, two-strokes are unbeatable when it comes to making noise. And it's not hard to understand why: a poppet exhaust valve will open with an initial velocity of zero.
A piston-controlled exhaust port will open with the actual velocity of the piston which at that point may be about 1,5 times the average piston speed. Guess who creates the sharpest exhaust pulse.
Sleeve valves too will open the exhaust port with a larger-than-zero initial speed.
As for the four-stroke: there is one engine that can keep up with two-stroke noise: the Wankel. It too has a >0 exhaust opening speed.

Vindication 500 pages later lol.
Not much sounds better than a two stroke coming onto the pipe.

While i was on the Honda site i seen this......

http://world.honda.com/powerproducts-technology/exlink/

[mr bucketracer]

thats a bugger about Gavin's bike , guess thats why i hate big race's

[F5 Dave]

We'll congratulations Dave and Nat. Dave probably has more 2hr wins at mt wgtn than any other man for sure.

[koba]

Triggering side would be my guess, some sort of pulse width problem, or . . . . . . mybe it's some sort of default rev limiter. Something that limits the rate the input resets ready for the next trigger. Look for an RC circuit controlling a latch.
I used the original Suzuki AC50 points to trigger the CDI through a debounce circuit. We ran it up in the bay using a signal generator and upped the speed until the capacitor charge pulses looked like a picket fence on the scope, it drew about 10A from the power supply. The output didn't drop 1v. Spark rate was equivalent to a V8 at 16,000rpm if I remember.

Cheers, beginning the mental digestion...

[F5 Dave]

We'll try the RS ign on weds or thurs and if it doesn't rev further then you'll know. Otherwise yeah maybe look at the trigger CCT and reduce C. Heck we should even get a rev reading, cause that ign is so noisy the dyno went deaf.

[wax]

The beads and bondi fill are spreading.

Im loving this so much

[andrew a]

Well done to Dave and Nathaniel. Hard luck to Gavin. Good to see Av doing some laps also.

[TZ350]

Hi Rob
The results of the 2013 AMCC bucket 2 hour race from yesterday.
A new record number of laps & an amazing stat of an average lap time of 29.93 for a whole hour of racing by winner Nathanael Diprose. That’s faster than everybody else’s superpole time except for Avalon’s.
Regards,

David Diprose

[TZ350]

OK ... once I realized why I was not getting any sparks, and that was because the Alpha-N map was zero at TPS zero.

I added a small value (0.305) in three of the top left fields and bingo there was spark.



The next move tonight was to try the lash up Flettner suggested, and yes I still had sparks and by switching the leads plugged into the injector socket I could easily figure out which was the injector energizing and shut off points.



Reduced the injector pulse width as small as possible.



And now I can setup the injector close point and with the timing light I can clearly see where the injection events are happening on the flywheel.

Maybe tomorrow night I will have time to see if this actually runs. ....

[koba]

We'll try the RS ign on weds or thurs and if it doesn't rev further then you'll know. Otherwise yeah maybe look at the trigger CCT and reduce C. Heck we should even get a rev reading, cause that ign is so noisy the dyno went deaf.

Oh, it revs further; no doubt.

Can't wait to see if it tests as good as it felt up the road.