digital dash completed

[Quan-Time]

Finally have 100% control over the whole bike. I haven't hooked up TPS in this video, but i will be using that in the next few days. Spark advance is controlled by me finally. Something that has never been done on a TRX to my knowledge.
Im running a V8 code, cut in half to make it V4, then running in wasted spark mode to make it fire twice in the one cylinder.. once when its meant to, once on the exhaust stroke. Which doesn't effect anything. Its a common trick on hondas actually.

I have a flat spot ~3000rpm as you can tell when it bounces back to 0rpm. My spark / advance table is still for V8.. So it sounds quite flat compared to what it used to.. But either way, now i can run flex fuel, alter timing on the fly, whatever i want really.

The computer also can control NOS, turbo (40psi max), launch control, limited traction control, ive been told i cant do fly-by-wire / variable trumpets. But im actually confident im able to.

Now that ive got all this hooked up im able to go ahead with the EFI and take over that aswell. Should be fairly easy compared to the spark.

So in the next few weeks, ill tidy up some wiring, put all the fairings back on. Hopefully have a fully working bike again with a digital dash. AND ! variable spark timing.
Its not that hard to repeat actually. You dont need a digital dash / PC to run it like i have. All you need is the small silver box and some wire modding, and the altered ignition pickup. The factory dash can be retained. But you would have to wire the tacho into the new computer obviously. Other than than, its possible to do in a weekend if you get all the components first.

questions / comments / ideas welcome.

[HansJ]

Interesting, but hardly something I'll do within the next days Just out of curiosity, what exactly did You have to do with the fly-wheel? It wasn't enough to change the pick-up only, did You have to put something on to the fly-wheel as well (sure looks like it). If I am assumig correctly, what use does the extra "measure" points do (Looks like more at least, can't recall how many original has).

Knock-sensors, will that be an option as well?

[Killerwhale]

[lars]

[Kevtrx849]

Holy shit batman !!!!
I'd hate to be trying to trace electrical faults on the side of the road with that lot.
BUT, very impressive.

[Quan-Time]

the electrics aint that bad kev.. once you have put the harness on / off 12 times.


The stock timing lumps on the TRX housing,, theres 4 teeth, one is a long "tach" tooth. It signals the ECU where TDC is, its also a firing event.

The new lot of teeth ive made is 36-1, which means 36 teeth, with one missing. There is a "rising edge" and "falling edge" on each tooth. So this makes 72 measurable events per revolution. The computer can also "predict" timing down to half a degree based on the rpm and the last tooth, so it "guesses" to an extent.. its very reliable. Some people use 60-2, but the sensor to pick it up must be VERY high quality.. the trx one obviously isnt.
For the record the TRX is a "VR" sensor.. or "variable reluctor" type.. Its not a "HALL" even tho its magnetic..

Knock sensor is actually prefered.

The MS (megasquirt) has a built in knock option.. If enabled, you give a few variables and the bike actually auto tunes on the fly ! ill give an example.

"engine start with 10deg advance"
"engine idle = 15deg"
rpm > 2500 then advance timing by 1 deg per 2 revs (which is one firing event)
if knock is not detected, go up one line
else retard timing by 5deg.
This value will be X
once value X has been his 3 times, minus Y degs (say 2degs)
stick with this until another knock is detected.

So if your riding, you get a bad batch of fuel, it gets a few knocks, it will back off timing, 5degs at a time, until it stops happening, it will advance slowly, until it finds a value that wont knock.. And stays there until it starts to knock again.
With a wideband O2 sensor you can also measure the exhaust, so you can run E85, and it will auto adjust as required. Hell, you could even run kero if you really wanted. Would need to alter the spark duration tho.. meaning, make it spark for longer rather than 2ms.. would be more like 4 - 5ms.

On the MS, there is a "prototype area". 5v. You can put anything you want on there. You could put a rpm tach signal onto it, and feed off onto something else. So as rpm builds, you can make an event happen. Such as variable length trumpets. Know those radio control servo motors ? push the stick on the control and the flaps move around ? make it rpm based.. more rpm, the more the servo moves.. you could make variable length trumpets, and tune the servo with a variable resistor. So to get it to move the right amount each time.
The possibilities are endless. And thats a LONG LONG way down the line. But im confident its very possible.
Thats why i think "fly-by-wire" is possible. Control one throttle body manually, and have the other one controlled via a servo. If you snap the throttle open, it could ease the other one open to control power properly.. Would require a microciruit, but i think its quite possible.

[TonyDevil]

'kin 'ell
wheres the we are not worthy emote

[JL]

That's an unreal effort QT - well done! Look forward to seeing more.

[Quan-Time]

Ive just successfully wired up the stock TPS. The little gauge inside the big RPM one is a TPS.. So now it all works fine.
Still working on the temp sensor. But once thats done, thats everything i need.

Not going to be able to play with it this weekend, got a wedding or somethin on.. Ill have to check with the wife. So nothing until sunday night, and by that stage ill prolly be stuff from 4hrs driving (obviously its 450km away, just to piss me off more).

Should really start a betting pool. How long it will take me to get it to a dyno, and how much power it makes.
The engine is 100% bog stock. Only thing it has is a set of slipon end cans. Oh, and new coils.