5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
I have a 1994 540i. I was looking online for a performance chip and I noticed a "high performance motronic chip" that increases the horsepower from 282 to "about 320" and the top speed to "170 MPH". It seems too good to be true. Is this all a bunch of crap? What should I know about performance chips??
if it sounds too good to be true, it probably is. if its a trusted performance company, the give it a shot, but if its so ebay type of crap-dont bother, all they do, as i heard, is raise the fuel:air ratio and give horrible fuel economy. so you decide.
Yeah, I have seen this seller with this chip many times. Good feedback but before I stick in a new chip I want to know more about it. Most of the time is is just dumping more fuel & air into the system and turning the fuel economy to crap... If you do go ahead with the purchase (and be the guinea pig) Please post back and let us know how it goes and if the claim is true..
That kind of gain is theoretically possible, based on what the factory timing and A/F is. I've seen people pick up that much with a great dyno tune with stock V8's of other makes.
If you're thinking about getting a chip, I would recommend one that some of these guys posted or get one burned while you've got some dyno time. That way it would be optimized for your car and any of its quriks.
__________________ 2002 BMW 530i
1997 Ford Mustang GT
1995 Honda VFR 750 (For Sale)
1964.5 Ford Mustang
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