TRX ignition curve

[Quan-Time]

Does anyone have a "stock" ignition curve or spark map ?

Im curious as to how my tweaked one compares. Concidering the stock ECU is "locked" and cant be modded (well, at a base consumer level, but i suspect factories can).. Im curious as to what the stock spark advance settings are. Anyone have data they can provide to me ?

[JC]

Hi

I see no-ones answered your post... And unfortunatly, I cant give you what you're looking for... BUT, I'm curios too...

As I understand it, the Throttle Position Sensor is a potentiometer (?), and thus gives a progressive resistance value for the ECU to act on, in conjunction with i guess the RPM, to decide when the best ignition time is for a given engine speed and throttle opening...

Therefore, doesn't it stand to reason that there is no fixed timing curve, just a maximum and minimum degree value?

I'd be interested in you comments...

Cheers

[Quan-Time]

if i sat down for a weekend with an oscilloscope and some beer, i could probably plot it out fairly accurately. I could also try to take a dump of the ECU in its entirety, and fake signals to it in software (basically create an emulator of sorts).. and hack out its BIN tables that way.. Or if someone gave me some codes, i could easily dump every BIN table.

I am curious because i want to compare my custom tables to the stock ones. I suspect mine are more aggressive, and i HUGELY suspect with time, i could even "reflash" stock units with customer spec requirements. That basically means if someone with FCRs and a nice set of end-cans sends me their ECU, I could re-flash it with a "better suited" ignition table. All i want to know is what the stock table looks like.

Saying all this, my TRX runs perfectly without the ECU at all.. I made my own. So mine sits there doing nothing (4XU). So im willing to experiment and try to get some data on it. Im sure I will anyway, but if someone provides "stock" tables, makes my hacking HUGELY easier because i can call interrupts on memory spaces and check its data, if it matches a pre-defined table, BAM... i can make a dump quickly. Its all dependant.

Im actually curious to try a few things between TDM and TRX.. Yes TDM is EFI, but they both share 38mm throats, this limitation means you can only get a certain % of air down it, and that limits your advance curve.
Ever wondered why TDM and TRX are different CC size, one is carb, one is EFI, but power output is remarkably the same ?. So with the amount of people putting on end-cans, full systems, cams, FCRs.. etc.. I think there is ... "use".. to try and do this.

Im still working 7days /week, so i dont have a huge amount of time to spare, BUT over xmas break its rumored that im getting some time off... WOO. 4 months straight is starting to kill me. 2 months break will be HUGELY awesome for some dev work. Any shortcuts i can get would be mucho-awesome. Means i can get some more done.

Incidently, i have some 41.2mm TDM EFI throttle bodies i will be most likely selling next year. Should be able to put a TDM at over 100hp fairly comfortably. Imagine that on a TRX... WOO again..

[phuk72]

Should be able to put a TDM at over 100hp fairly comfortably. Imagine that on a TRX... WOO again..

I don't have to imagine

Some interesting reading as always QT - can't wait to see what you can do when you've actually got some time on your hands

[dandywarhol]

I could be interested in your throttle bodies QT - I've a lightly tuned TDM900 with a flowed head, Kent cams, K + N, modified airbox and Akras but running standard injectors and throttle bodies. Its also running with Carillo rods but they're really a waste of money on a road engine IMO.

[Quan-Time]

You would need some dyno time to re-tune what you have, and the easiest solution is a PC3 (power commander3).. Part of the problem would be it leaning out too much.. But if your local dyno operator can play with fueling, your good to go. Im sure we can work something out at a later date

[dandywarhol]

I've got a PC 2 (only fuelling) at the moment - and access to a dyno, so whenever you want QT.
Are you in the UK?

[Quan-Time]

aussieland, but thats no real issue.
Ill need to make a special adaptor of sorts, as the ones i have, ive put special trumpets on it. Id need to get a pic of the stock ones and make something up quickly. Im after 2 specific details, nothing hugely complex.. But requires removing your tank / airbox. They can be in position for the measurements / photo. If you keen, let me know.