M5 Expert (>4000)
Join Date: Jan 2001
Location: Silicon Valley
Thanked 217 Times in 142 Posts
It is difficult to describe, but the ECU tuning does more than pressing the sport button. There is more to throttle remapping with the engine software than just making the throttle bodies open wider for a given amount of pedal movement. There are real gains in torque, HP and driveability, but not dramatic. It will be more satisfying to drive is all I can say. As long as the software don't alter the peak rpm limiter (or don't often exceed the stock rpm limit if the limiter is removed), there shouldn't be any significant added wear or risk of damage to the engine. Increasing the rev limits (which is DIFFERENT from removing the top speed governor) just a couple hundred rpm GREATLY increases the stress levels on certain engine components, so I advise not doing that. The option to increase the rpm limiter or not should be present on all good ECU aftermarket software.
'01 M5 (now my brother's car) UUC SSK + Rogue WSR/RE Tranny Mounts+Royal Purple Synchromax/Axxis ULT Pads/StopTech SS Lines/TC Design from BeastPower Anti-roll Bar Brackets/Dinan LtWtFlywheel and Stage 3 suspension/4xOEM rear 275 Goodyear F1 Asymmetrics/Vines thrust arms/IATS relocation/10w-60 oil/hardwired Escort 9500i/Euro Armrest/TEC Cupholder/IceLink/PowerChip 91 Gold/TUBIs!/Strong Strut/BSW Stage 1/BT/Angel iBrights 3.0/space-saver spare by Bimmerzone
'11 Jaguar XFR, Quicksilver exhaust, Escort 9500ci
Unnamed weekend Italian 2 seater with DCT
Future - F10 M5 with manual transmission?
"Is it the sounds that make a BMW a BMW? A BMW is designed to be heard, felt, experienced. So our engines sing. Our steering talks back. And we insist on offering manual transmissions in nearly all our models for drivers who crave them. The result is an almost telepathic oneness with the car. Just as surely as you can hear a BMW, a BMW hears you."