[paul.zr1]

I dynoed my 550 before and after installing Tubi exhaust (the straight thru flavor) and lost about 10 hp and 10 #'s torque. I noticed the air fuel ratio was slightly leaner throughout the rpm range.

Does anyone know how to reprogram the ecm to add the fuel back in?

Regards,

Paul

 

[Stradale]

Welcome Paul.

Only the dealer has the computer to be able to adjust/reset the ECU. You may have to go back to them.

 

[Andrew]

This company sells ECU chips. This should help by-pass/trick the Ferrari computer into doing what you want. Check them out:

http://www.powerchipgroup.com/choices.asp?entry=powerchipgroup.com

If you do go with them let them know Ferrari Forum referred you. I know a person there and it would be helpful.

 

[Andrew]

I guessed 1999 for your year and here is the direct link to the chip for your car:

http://www.powerchipgroup.com/interact/datasheets/datasheets_two.asp?pid=Fer0011

 

[Andrew]

Sorry, one last thing, I got way ahread of myself. WELCOME TO THE SITE If you get the chip please let us know how it re-dynos and if they give you a graph post it. We have some 360 graphs and a 328 graph so a 550 would be nice too.

Cheers,
Andrew

 

[paul.zr1]

Thanks for the info. My car is a 2001, SN 126803 . I believe it is either the last or the second to last 550 produced.

Paul