Stage 3 installed with exhaust
I have a '12 7 series with Dinan stage 2, which had to be reinstalled after dealer erased during software upgrade recently. After the reinstall, I noticed a definite throttle lag, almost a two-step process during light acceleration that wasn't there before. Dinan said that this was due to the vehicle adapting after the complete software reinstall. I never noticed that the first time around however. Now that I installed the stage 3 with exhaust, there is no lag on the 7 whatsoever so I'm not sure that I'm buying the compatibility of stage 2 with the new BMW software. Unfortunately, I couldn't dyno the 7 as it's a long wheelbase X-Drive, and would not fit on their four-wheel-drive dyno. The car drives even better with stage 3 and the exhaust note is nice but not over bearing!
On a side note, and since nobody has posted actual dyno numbers yet... I also just had Stage 3 installed on my '12 650iC. Had car dyno'd before and after and assuming same engine in both here are the results;
Stock: 328 WHP on dyno, 18% loss to wheels equates to 400 hp stock at the flywheel
Stage 3: 457 WHP on dyno. Calculates to 539 hp at flywheel, with Dinan exhaust
I will post the pull sheets w torque once I get them next week.
I can tell you the results are very impressive on the lighter 650i and traction control kicks in between all gear shifts at WOT to stop wheel spin.
2012 BMW F02 750LiX, Alpine White, M-Sport, Dinan Stage 5, Dinan Exhaust, H&R Sport Springs, Coded, Paddles.
2012 BMW F12 650iC, Mineral White, Dinan Stage 3, Dinan Exhaust, Dinan Shockware, Coded.