Standard Ecu Modifications

[Powers 13]

Just out of interest, and to help win a debate against a friend. What can be done to a standard 205 1.9 ecu (1990) I think it is a Motronic 3.1.

 

Add/correct the list below:

 

Rev limit can be changed or removed

Air fuel ratio can be changed to over-fuel at high rpm.

 

Cheers.

[Banjo 1]

Not a lot as it's Jetronic on 1990 8v, try a search.

You can change or remove the rev limiter, not much point on 8v, but I think thats it as its analog.

Ben

Edited February 21, 2006 by Banjo

[Rob_the_Sparky 9]

You can tweak mixtures for idle and normal running but for normal running it can only be done in a quite coarse way that effects it at all load/rev sites.

 

Rob

[DrSeuss 0]

Anything is possible. Motronic 3.1 can be fully remapped but you will always retain the afm. Jetronic is all analogue so its only possible to remap via changing components. Considering most electronic engineers build more complicated embedded computers daily, it would be easier to start from scratch!

[Rob_the_Sparky 9]

Trouble is that the "base map" is in the AFM and that is neigh on impossible to tweak. Hence Jetronic is pretty difficult to adjust. With enough info (I'm talking stuff that BOSCH will count as trade secrets here) it is certainly possible but really it isn't going to happen!

Edited February 21, 2006 by Rob_the_Sparky

[petert 554]

I think it is a Motronic 3.1.

 

It could be Jetronic, or it could be Motronic 1.3, but not 3.1.

 

If it is a Motronic 1.3 you can do what ever you like.

[Kamel6k 1]

you can change rev limiter, mixture and injection time by this mod:

 

http://perso.wanadoo.fr/jso/39/calculagti.htm

[309PUG 2 1 Cars]

you can change rev limiter, mixture and injection time by this mod:

 

http://perso.wanadoo.fr/jso/39/calculagti.htm

 

Great link, but not too good with the lingo, can you translate, or tell me exactly what it will achieve, ie does this raise the rev limit if so to what, etc etc.

 

Chris

[Kamel6k 1]

It's something like this:

 

Go to a shop with electronic components and buy:

 

TLC274CN Integrated circuit

Electrical resistor 1% 6,81 K

Electrical resistor 1% 1,82 K

Capacitor 300 nF

 

(if you don't know nothing about electronics, show this to the man in the shop, he will know)

 

 

Reference: -> Old component: -> New component:

BS30 -> Bosch 30017 -> TLC274CN

C781 -> 470 nF/100V -> 330 nF

R704 -> 5.6 K.ohms -> 6.81K.ohms

R705 -> 5.1 K.ohms -> 1.82 K.ohms

 

Here's a picture of where they are in the ECU:

 

 

 

 

 

 

 

The ECU:

 

 

 

The Rev limiter will be in something like 7800/8000 rpm's or more. Therre are dino's where you can get 7bhp (not maximum bhp exactly, but somewhere in the rev range, and 3/4 maximun) There are people who acheved more, people who acheved less...

 

 

 

P.S:I'm only saying what's in the page (the valeus ive seen in the discution forum where some members dino'ed theyre cars) I'm at the moment doing it on my ECU.

Edited February 22, 2006 by Kamel6k