This is very interesting.
I hope for aprox 300hp/700nm and will be satisfied with that(I think :-)).
Often what happens is that the power becomes a habit. And one want's more :-)
My concern is the autotrans. ZF says my version is build to cope with 600nm. Going well over that might be a problem. Speaking to the guys at promotec in South africa who does these 300hp/700nm conversions, they haven't yet had customers who has had any problems with the autobox.
'06 E91 330dA Sparkling Graphite|19" AvantGarde M359 Satin Black|335i brakes|Bilstein B16 IRC|Powerflex|GroundControl|Wagner|Ecotune|Turbo Dynamics|Zimmermann