Husky 701 Enduro

cosworth2 a écrit:
Si tu te décides à commander , je te conseille de prendre chez rallymotor en Hollande lien ci dessus , c'est rapide et ça vient d'Europe donc pas de soucis de douane ou autre .

Benjoy25 a écrit:

cosworth2 a écrit:
Si tu te décides à commander , je te conseille de prendre chez rallymotor en Hollande lien ci dessus , c'est rapide et ça vient d'Europe donc pas de soucis de douane ou autre .

Hello Arnaud, j'ai regardé sur le site Rally motor, mais je n'ai vu que 3 produits qui m'interressait et encore, les filtres à air chaussettes, niet nada rien!!

jms74 a écrit:demande a Albert , il avait mit un dongle de mémoire sur son 701

Rottweiller a écrit:Fueling Dongles?? Huh?? There seems to be some misconception from time to time about our Fueling Dongles and what they do and today we received an email that we found interesting and wanted to share anonymously the content and our response so that it may help anyone else understand what they do. For some reason they seem to cause allot of investigation and theory about how and what they do and hopefully our response below will help make sense of it all. They are actually pretty simple.

(Customer) Hi,

I am looking at purchasing a fuel dongle for a KTM 990 and am a little confused as to how it could work.

I understand that the fuel dongle plugs into the O2 sensor line, replacing the O2 sensor output with a predefined voltage that is interpreted by the ECU as a slightly too lean mixture which the ECU responds to by enriching the mix a bit. BUT after enriching the mixture, the fuel dongle still reports the same, slightly too lean, mixture. Surely the ECU would respond as it did in the first instance and enrich the mixture further. (RP-It would need O2’s to read this and they are gone now. See below.) And so on, ad infinitum or until the ECU can no longer respond by which time you would think the mixture would be way too rich. (RP-They stay stable at about 13.9, see below as to why)

(Rottweiler) Thanks for the email inquiry. Looking over your email there is one thing missing and that is that the Fueling Dongles have been plugged in and the O2’s are now out of the loop, the ECU has no idea what the resultant mixture is anymore. It only has the one ‘static’ signal from the Fueling Dongles to go off of and simply defaults to one setting that happens to fuel below 5k at around 13.9. Your idea of the ECU running in circles until it’s over rich is assuming that the ECU continues to believe that the mixture is lean and without the stock O2’s, it can’t read that. Make sense? It doesn't know what lean is, it can only respond to signals that tell it to switch to a map that the programmers at KTM feel is a good result according to what the O2's are telling it.

(Rottweiler) (Explained in a different and possible better way) The ECU responds to signals from the O2s with the ability to choose from different maps (As far as we can tell. Don’t EVER listen to forums for this information as there are a precious few professionals that can really explain what the ECU has been programmed to do and none of them that we have seen spend time on forums.) The only way it could keep getting richer was if the ECU continued to get differing signals telling it to do so and it can’t without the O2’s. So… basically ‘X’ amount of volts returned from the O2 wires says “go to this map” and ‘Y’ amount of volts says “go to that map”. The Fueling Dongles just keep giving the same voltage signal all the time so it stays in whatever map that happens to be. In our case, it measures out to about 13.9 on average instead of the ECU trying to keep it at a much leaner 14.7 AFR all the time.

(Customer) I guess this same situation also applies to the temp and air pressure sensors. The ECU presumably takes inputs form the O2, temp and pressure sensors and uses this information to compute the correct amount of fuel for the ambient conditions. But if the O2 sensor is continually reporting a too lean mix, surely the ECU is going to get a little confused as to what the hell is going on?

(Rottweiler) Not really. All that is happening is that in ‘closed loop’ mode somewhere around 5k and 20% throttle and below, it is looking to all of the sensors for input as to what to do. The only part taken out of the loop is the O2 plugs and it is now only getting the one signal that causes it to default to a richer map. All of the other sensors are still in play and the maps still have some fine tune adjustability for warm up (temp sensors) and altitude (MAP sensors). The maps are only now being adjusted at a richer AFR at around 13.9 instead of 14.7. Essentially the ‘loop’ that I think you are assuming is happening, can only be happening if it can still read the result, which it cannot. It can only respond to what it is told and in this case we are telling it to ‘just stay put about right here’.

ADV67 a écrit:C'est soit le mapping Akra (par le concess), soit le dongle.
Pour ma 701 j'avais opté pour le mapping Akra qui est nettement plus nuancé en fonction des régimes moteur et états de charge du moteur que le simple dongle.
Le résultat était excellent, moteur plus plein et plus agréable à conduire sur un filet de gaz, des meilleures reprises.
Avec ce mapping un Power Commander est vraiment pas nécessaire (enfin, c'est mon avis).

Mais il ne faut pas mettre Map Akra et dongle en même temps.