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I believe that's a Will Creedon chip, mine had the same.
Thank you all for the info, As stated I am going back to the stock exhaust, isnt the Creedon chip basically stock mapping that he was sent from Moto Guzzi to correct their error in mapping? What would I need to do to use stock exhaust?
isnt the Creedon chip basically stock mapping that he was sent from Moto Guzzi to correct their error in mapping? What would I need to do to use stock exhaust?
The chip has one feature that was derived in the way you mention, and that is factory developed changes that mitigate the stalling at idle issue that is common on 97/98 Guzzis with the 16M EFI computer. All the rest including all the maps, warm-up and altitude compensation is different, developed independently. Guzzi did not change the maps on chips they distributed.There’s a funny story that was told by the guy at Moto Guzzi who became responsible for emissions and dyno development about 2001, after Aprilia bought Guzzi and installed several dynos at Mandello for that purpose. He had come from Ferrari, rode a Centauro himself at that time and had an interest, and claimed in 2002 that Marelli had made a mistake and shipped the production ECUs with incorrect maps due to a mix-up. But by this time the bike was years out of production and Aprilia (like Detomaso before them) was short on money, so given the regulatory issues nothing happened to correct the bikes having been shipped with incorrect maps. One can decide whether to believe that 20 year rumor or not. My guess is that the horrible Centauro maps were the result of something more basic, like lack of time or equipment in Mandello and the need to ship bikes to make some money.The C5 chip shown by the original poster was the 5th and final released Creedon development interation for the Centauro. It works fine with the stock intake and exhaust but there is about 8 HP additonal horsepower and more midrange torque in using the C-kit style intake horns and individual filters plus a tubular crossover and more open mufflers.
“The chip has one feature that was derived in the way you mention, and that is factory developed changes that mitigate the stalling at idle issue that is common on 97/98 Guzzis with the 16M EFI computer.”I still have this problem on my 97 Daytona even with the Creedon chip.
My Centauro just needed a minor adjustment to a potentiometer inside the ECU.
Yes. It was going to be too expensive and impractical to get the correct chip certified and delivered around the world. I was given a correct chip by someone I knew at the factory. He asked me to distribute them. I made copies to give away, and worked with Anderw Ball (?) and Will to figure out the fuel map locations. Will put time into dyno tuning them.
The chip was not installed by me and I have no idea which way to adjust it; is it just a go this way and see what happens?
The little screw next to the chip has 270 degrees of travel and affects mixture up to the mid-range. Counter clockwise is richer, clockwise is leaner. Don’t attempt to turn it further than the very fragile stops allow.
IIRC, I used a plastic screwdriver and turned it 1/4 turn counter-clockwise. Went from "flaming out" at stop to a nice steady idle.
I made copies to give away, and worked with Andrew Ball (?) and Will to figure out the fuel map locations.
Thanks for the info, now to find a plastic screwdriver.
I wouldn’t worry excessively about a plastic screwdriver. Just touch the ECU case with one hand while turning the screw with the other and you likely won’t have a problem. The bigger issue IME is that people turn it too far, breaking the stops. The potentiometer then still works but you have no reference for where full lean and full rich are located.
Just to what Tusayan said, that pot is VERY fragile. I had to repair three or four of them for people.
I will make sure that I'm cautious about moving that screw.
You have been warned. Back in the day, when I was "tuning" them, I started full rich, then leaned about a 1/4 turn, test rode, came back, leaned 1/4 turn, etc. until I got a lean stumble when accelerating. Then, turned it a "little" rich, test rode, etc. until the lean stumble went away.
Wonder what happened to Will; was a regular back in the day???
