Any of you have any experince with the ACS supercharger for the Z4? I have read about it and have seen videos on it, but I have never encountered anyone with one on the car yet. Please let me know if anyone has any experience with them as our I sell the ACS stuff, but yet to see or sell one of those. Any info is appreciated.:)

wow ... hadn't seen it yet. its on the standard straight 6? or the m5 v8 put into it?

That would be on the stock motor, not the M5 motor. I sell them and I was wonderign if anyone has any feedback on them. If anyone is interested I can post some info about them or you can give me a call, or even IM me.

Okay, the supercharger is still in development, it was supposed to be released by now according to the importer I talked to last year. It should be ready in a couple of months though as they are seeking CARB approval, which is nice for CA residents.

The kit will produce 295hp at the flywheel, that will be a good kick for a little car like that. The other issue they are having is the fueling, since Europe uses 95 octane and the gas here is CA is 91. I will try and post more updates when I here more.

i would be very interested if i wasn't under warranty still, and if i had that kind of money to spend, but i don't :bawl

is it offered on the 2.5i? if so what kind of hp does it produce, and what psi does it run?

Not sure what motor it will be for, either the 3.0 or the 2.5L. The boost is very moderate, about 5-6 psi I do believe, so nothing that will cause detonation or any other problems like that on stock compression. The kit that they ahve told me about up to this point produces 295hp at the crank.

Why don't you guys talk to Karl about his Rotrex unit. Jimmy C might be able to adapt the twin screw, but it'd be a while.

Both of there would be alot cheaper than ACS.

http://www.renn-sport.net/BMW/engine/asa_engine.htm

there's some photos and stuff on the Z4 board on their forum