187 replies to this topic

[arthurbikemad]

Yes I know I mean your progress with mapping it is what interests me

[celticbiker]

Basically you splice the signal wire so the yellow box can modify the signal and send it on to the speedo.

 

wiring pdf is here in my dropbox if you want it

 

https://www.dropbox....on pdf.pdf?dl=0

[fixitsan]

Basically you splice the signal wire so the yellow box can modify the signal and send it on to the speedo.

 

wiring pdf is here in my dropbox if you want it

 

https://www.dropbox....on pdf.pdf?dl=0

 

 

Thanks for that....was that on the TDM ? The pdf shows the signal going directly to the speedo.....in order for the ECU to make use of it it must pick the signal up somehow....or not at all!

My mind has become hung up on designing an ignition mapping box. Reprogramming the ECU needs special connectors, or fiddling about with individual connectors....but it is possible to design something which advances or retards the stock ignition timing by a user programmable amount, at various rpm's

[celticbiker]

Looking at the wiring diagram I should think that it would be the green wire that is interrupted as this goes directly to the speedo.

The black and black/white are earths and the red/blue goes to the ecu.

This would suggest that the ecu is going to get a correct to spec signal and therefore adjust the power delivery at the wrong time because what the bike is doing is different from what the ecu thinks it's doing.

Actually on reviewing it, wheres the power supply?

Edited by celticbiker, 20 February 2016 - 11:33 am.

[arthurbikemad]

You will end up designing an Ignition module by DynoJet

[celticbiker]

Probably but for half the cost.

[fixitsan]

Looking at the wiring diagram I should think that it would be the green wire that is interrupted as this goes directly to the speedo.

The black and black/white are earths and the red/blue goes to the ecu.

This would suggest that the ecu is going to get a correct to spec signal and therefore adjust the power delivery at the wrong time because what the bike is doing is different from what the ecu thinks it's doing.

Actually on reviewing it, wheres the power supply?

 

 

What I meant was, is this something that you have fitted to your TDM ? Although the manufacturer's diagram shows the wire going to the speedo, it doesnt necessarily need to go to the speedo, just the speed reading device.

[fixitsan]

You will end up designing an Ignition module by DynoJet

 

 

I know, I know......  Seen the cost of those though ?

[celticbiker]

Yes it's fitted to my TDM but not by me, it was already on there when I got it.

Dandy might have put it on there.

As an aside I find the Yellow box to be much better and more usable than the Accumen version.

Hmm, interesting, didn't know they aren't trading anymore.

[arthurbikemad]

 

 

I know, I know......  Seen the cost of those though ?

 

Yeah I agree, I am a DJ dealer, but you can get a better deal of eBay, so much for trade price Anyway you guy's are on the ball, Carpe-tdm members seem to know their onions better than most

[fixitsan]

 

Yeah I agree, I am a DJ dealer, but you can get a better deal of eBay, so much for trade price Anyway you guy's are on the ball, Carpe-tdm members seem to know their onions better than most

 

 

 I work for a company better known for making cameras, we get access to the 'staff shop' online where we get discounts. It is still cheaper to buy from eBay, and when they have a special offer running Currys/PC World too.

[fixitsan]

When I said i had downloaded the ECU data...I meant from my 'spare' ECU which i bought especially for mucking about with

 

I tried downloading the contents of the ECU on my 900 and the software won't read it. The programmer of the software says he gets similar problems with some Suzuki devices, they use a special 'masked ROM' chip sometimes and he thinks the later ECU on my 900 has that

 

It looks like it's going to be hit and miss for anyone with a younger ECU than 2003......

 

 

In the meantime I've started work on reinventing the Dynojet wheel, but i should be able to do something very cheaply. At the moment I'm thinking about a self teaching automatic ignition advance device. The alternative is just to move the ignition pickup coil a few mm anticlockwise.

 

Take a look on eBay for 'ignition advance rotor' and you'll see how a 4 degree advance (with good quality fuel) is a popular tweak. The problem with it though is that the fuel injection also takes place 4 degrees earlier., although it seems to be a non-issue for most bikes.

 

What I'm hoping to make is something which restores the amount of advance in lower gears to the same as that in the higher gears.

 

 

 

There are various reasons why low gear retardation is employed and probably even more ways to get around it....If only the TDm was as simple as the SV650 to sort out.... I like this mod  http://sv650.org/ig_...gnition_mod.htm

[JBX]

Something like a centrifugal timing advance should do the trick !

Then you may also add a vacuum timing advance...

And replace that silly ECU with just one HT transistor.

 

Just joking...

[Bjørge]

What about writing software for using a Raspberry Pi to replace ECU ?

 

https://www.raspberr...hp?f=31&t=97514

 

[fixitsan]

I know it seems almost pointless, but I don't mind spending some time on it to see if it actually is or not.

 

Without access to the maps I guess I'll just put a data logger on the puickup coil, ignition couil, inlet pressure sensor, speed sensor and a fuel injector. I reckon just by logging those values through all the gears a clear picture should emerge about if there are lower gear limiters _for sure_ , and if there's anything to be gained by playing further.

 

From standard, most bikes, even sports bikes, benefit notably from an extra 4 degrees of advance without risking causing damage at higher revs. The allowance is made for low fuel quality, among other things. If the simple fix is to elongate the holes in the pickup coil mounting, like I did for my FJ1100, then that's no big deal !

[fixitsan]

What about writing software for using a Raspberry Pi to replace ECU ?

 

https://www.raspberr...hp?f=31&t=97514

 

 

 

I could, i have a couple of Pi's here and was going to use one for logging the existing maps by monitoring various parameters.

 

The Pi needs interfacing, and doesn't work completely in real time, especially when programmed in Python (and I like Python). I prefer to use assembly language on Microchip Pic processors. Pics still need interfacing and in an application like this a pic is capable enough of running an open loop ECU system.

 

For closed loop applications a higher end DSP pic, 'DSPic' would probably be better, but then I'ld be having to revise my C programming skills, and I'm not feeling in the mood to be honest

 

By the time I'ld go to the trouble of spinning a PCB, and testing all the interface compnents, driver mosfets and A/D convertors, I'ld be as well going for a programmable ECU, a Microsquirt would do a fine job. (and would almost certainly be cheaper)

 

For about the same price as some of the Power Commanders you can get a fully programmable replacement system https://www.diyautot...wiring-harness/

[fixitsan]

I forgot to mention, adding a custom ECU solution almost certainly makes the electronic dash inoperable as well as any other subsystem which relies on the ECU

[JBX]

You may keep the original ECU only to feed the dash with data and another (custom) ECU to do the main job.

Both will share inputs from sensors.

Should be easier than managing a k-line interface.

[fixitsan]

You may keep the original ECU only to feed the dash with data and another (custom) ECU to do the main job.

Both will share inputs from sensors.

Should be easier than managing a k-line interface.

 

I'm guessing it would probably show an error on the dash though. The engine wouldn't be behaving to changes to which the ECU thinks it's making and perhaps a sensor fault could be suspected ?

 

It's possibly worth trying

[fixitsan]

Actually JBX you've got me really thinking about that

 

There isn't any feedback from the injectors or coils, only the O2 sensor might get confused, but that can be bypassed.

 

 

This is more interesting than a Power Commander !