Posted by C.Yang on September 17, 2000 at 15:45:58:
(posted from: (18.104.22.168))
I was at dynospot last weekend talking with the owner i believe. We were talking about our bmw's and the good mods for them. Then we came up to the whole chip idea, and he said that it was worthless. I was quite suprised because I have heard many good things about all of them, but he then explained to me why. He stated that with obd2, the chip will choose whichever fuel map is optimal for each certain situation. What the chip upgrades do is put more radical fuel maps into the car. What happens then is your car will use these maps for a little bit, but not like them because your car will ping like crazy. so after a few runs, the horsepower will go back down. He said you could try and force your car to use more radical fuel maps, but it isn't good for the engine. He then stated that on all the 96+ m3's he's dynoed, after installing the chip there was an increase, but after about 5 dyno runs, they were back to stock. So basically chips are worthless. He said that the 99 m3's usually have a little more bhp then previous m3's with anywhere from 209-213 at the wheels. He said that the best bang for the buck is the ECIS intake which usually bumps the hp at the wheels up to around 220. If you disagree with him, then I guess you can go on the dyno day. I think it is october 21. Another thing, has anyone tried his cams that he's developing? He claims 15 at the wheels for 1 grand.