ECU in the S550
155mph Speed limiter is removed and 186mph is now the limit
Horsepower increases by 20bhp from 382 to 402
Torque increases by 20ft lbs from 391 to 411
Not to sound "cheap" but this would be a $2000 job (including tax / installation)
Thats $1000 per tenth of a second in a 0-60 clocking.
What do you all think? Thats all the information I have at this time so I thought i'd present it to you all for your thoughts.
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I really dont know. He just said that he didnt think it was a wise idea.... He did however say Headers would not be a problem....... just that the ECU was not a good idea.
We dyno-ed a stock SL 550, and the a/f ratio was very lean and not linear. So i am confident the ECU upgrade does help.
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