(16-12-2011 01:21am)BMW86 Wrote:  Sorry if I'm missing something. The TD4 is remapped from 150bhp to 190bhp but what is the estimated power output for the SD4?

Quote: I've settled with a little less power than I originally quoted and tuned it for because I really wanted to maintain the RRE driveability design and feel it was intended for, and of course also Economy and reliability more so. The Autobox components are not the best/strongest in my opinion and from the documentation I have pushing much more could cause premature failure of which none of us really want and I dont want to be responsibile for either

I have settled around 30bhp but giving upto 80Nm of torque more and upto 100nm is requested in certian places to keep the car feeling very smooth being very carefull NOT to make it to "punchy" and with a "on off" like thorttle responce as this would detract to much from what the car is really about. I have also taken a lot of care to keep the gearbox from chopping and changing gears like a yoyo under load or acceleration.

I have being very carefull to adjust each gears torque limits and torque gain seperatly and according to the safe working limits of the autobox and engine components. Tuning like this does not give the best boastable 0-60 times on paper in the world but it does shave a little from the factory set time, that said the important part is that doing this does keep the car safe, reliable and smooth to drive which was one of the main aims I had when I started the tuning.

I have primarally optimised driveability giving a nice overall gain in power torque making the car altogether nicer to drive everyday.

I hope that all makes sense.


Pete