Originally Posted by schulrog' post='787200' date='Feb 6 2009, 08:03 PM

No. Should be instantaneous. at least that's how it was for me. try resetting the tranny

Originally Posted by Krozi' post='787176' date='Feb 6 2009, 10:21 PM

I told my friend about the SB and he thought it was BS. So I installed it on his car (328i Automatic) and at first he didn't feel anything. Then after 20 minutes he said that he definitely feels it so after a couple burnouts and some testing we drove back to my car and he got into my car so I could show him what the V8 could do with the SB. It was fast but I did not feel the SB kick in. The downshifts were slow and it was a little unresponsive. After 20 minutes or so again that slowly faded and the responsiveness came back again. And after having the car sit in the lot for 4 hours I drove it home and I definitely felt the SB. Now it pulls away like a beast again. So is does it take a little time for the SB to take effect? Or could it be the extra 170 pounds of my friend sitting in the car?

I have heard that results are immediate with most people. So I am not sure if I am just imagining it.
I think I will have to drive my car with out the SB and test the differentce... next time I go to the dealer I guess.

Thank you.

Originally Posted by zen68' post='787215' date='Feb 6 2009, 11:27 PM

There shouldn't be any delay.

By the way, SB is the same for all models? I thought it's model-specific.