ESE's works engine tuner

[husaberg]

Website under construction, no phone, no reply to email; I think they are not in business. I've checked out several other small two stroke throttle body injection systems as well. So far, no luck. I suspect they don't offer enough advantage over carbs and are higher cost.

The small IC engines are also in danger of being replaced with battery electric systems. That's pretty much happened in the under 15 cc model engine area and is creeping into even larger sizes as battery costs and weights go down. We'll see what happens with larger, low weight, high power applications.

Lohring Miller

Battery weight stays the same regardless of charge where as fuel weight diminishes as fuel load decreases thus increasing range and performance.
Electric for planes doesn't make sense a lot of sense. unless you are talking servicing costs.

He had a lot of publicity. Shame.

[Carel H]

Attachment 341902

My first efforts with an Op Amp were a bust. It took me a while to find out that an OP Amp has limitations. It is unable to completely swing to the extremes of the supply voltage. So a 0 to 5 Volt power supply is not good enough for a 0 to 5 Volt analog output. To get a zero Volt signal out you need a negative supply rail to the OP Amp.

Sounds like LM741. Try something like LM224. Single supply, nearly full swing. Full does not exist.

Trimpots for understanding amplification.
Study RC filters for frequency response.
And then: noise, what spoils it all.

Analog, when you thought you knew it all. Not.

[TZ350]

160 mph in full flight down the hill and drum brakes, check out those battered and un muffled expansion chambers.

Team ESE was Bucket racing at Hampton Downs last Sunday where I meet up with Peter who was racing his FXR150. He rode air cooled Yamaha's at the IoM in the late 60's.

Maybe at only 160 mph down the hill the bikes were not quite as fast as the latest 200 mph super bikes of today but the pilots were just as brave. Real brave men who rode the flexi fliers back in the day and pushed them to their limits just like todays road warriors do. Back in the day they were getting them airborne over Ballaugh Bridge too. https://youtu.be/rpVABjI9-3w

[TZ350]

Sounds like LM741. Try something like LM224. Single supply, nearly full swing. Full does not exist.

Trimpots for understanding amplification.
Study RC filters for frequency response.
And then: noise, what spoils it all.

Analog, when you thought you knew it all. Not.

Yes LM741, thanks for the heads up about LM224's and the suggested study. Being a newbee to this electronics stuff the suggestions are very helpful.

[Pursang]

This is Buckets, you take a simple idea like EFI, leap in boots and all, find out how complicated it is to implement then learn a shit load along the way trying to make it work....... .... Love It.

We Love that you Love it TZ. Your intelligent & persistent dedication and selfless sharing of your project is inspirational.

cheers, Daryl.

[husaberg]

Can someone post the stud spacings on a RGV 250

I have a feeling its 90mm front and rear and 85mm between

[lohring]

Battery weight stays the same regardless of charge where as fuel weight diminishes as fuel load decreases thus increasing range and performance.
Electric for planes doesn't make sense a lot of sense. unless you are talking servicing costs.

He had a lot of publicity. Shame.

I'm talking about model boats and airplanes. My conversions don't weigh much more than the IC versions, but have considerably more power. I agree about full size planes that need to have significant flight time. However, electric trainers have enough endurance for that job and cost a lot less to operate.

Lohring Miller

[katinas]

Can someone post the stud spacings on a RGV 250

I have a feeling its 90mm front and rear and 85mm between

Hi,

Yes, 90mm at front and at rear, but 82mm between.

[lodgernz]

team ese was bucket racing at hampton downs last sunday where i meet up with peter who was racing his fxr150. He rode air cooled yamaha's at the iom in the late 60's.

mgp 1969, tt 1970.

[guyhockley]

Don't know if it will work in NZ, but there's nearly ten hours of video from last week's NW200. No 2 strokes, though, sadly...

https://www.bbc.co.uk/sport/live/nor...eland/48187693

[TZ350]

Got my LM741 Voltage follower Op Amp working. For now I am using two 9V batteries for the + and - Voltages. If it works sorting out the unstable readings from the TPS then I will setup something more permanent with a DC-DC Positive - Negative Voltage converter. One's for Arduino and RaspberryPie's are cheap as chips.

I have a couple of these tiny reverse voltage modules on order. Just the thing for my job.

If you need a bit of positive/negative power there is lots of different versions of converters available from AliExpress.

[TZ350]

Arduino Nano mini computer.

People have asked me why I have been positing this electrical/electronics stuff. Well these little computers and their associated devices like realays and PWM servo control and stepper motors means we can do some things much more easily that were not so possible before like:-

Flettners idea of changing the rotatory valve timing on the fly.

Frits's idea of opening the stinger when in over rev to reduce detonation caused by running out of Ex blow down time area.

My idea of splitting the inlet into two channels and at low rpm closing one side off for better low end torque and carburation.

https://youtu.be/FeB9O6rtLXQ .... https://youtu.be/ar8YST2TYjQ

The famous plenum idea could be developed to stay in resonance thereby greatly increasing power.

https://youtu.be/YxiEo8cgopg .... https://youtu.be/p4ef-WUO1Qs

The expansion chamber pressure bleed was very effective at improving low end torque and carburation too.

These little computer chips and associated bits are so affordable they open up a lot of tuning possibilities and can be run from 12Volts or a small battery.

On the dyno the split inlet tract and chamber bleed both improved low end torgue and carburation. The plenum chamber was ride able and we took it around the track a few times but the biggest most exciting thing about it was there was a definite torque bulge when the plenum came into resonance. On the dyno the torque bulge was dramatic and if we could keep it in sync with the motor I think we could have something very effective.

If I get the EFI thing beat then I am coming back to these ideas that have shown real promise and going to incorporate them and have a little Arduino Nano control them all.

[TZ350]

Classic ........



Crosby ........

[Carel H]

People have asked me why I have been positing this electrical/electronics stuff. .

They took their time! Everybody hates electronics.

Another idea: servo controlled needle. Left rocker controls the needle.
The drawing shows the open and closed positions, so use a little fantasy.

[Frits Overmars]

Another idea: servo controlled needle.

Been there, seen that, built by my mate Martijn Stehouwer (wwwe.emot.nl). Still, I'd prefer to go the whole way: a decent two-stroke injection system.