Dinan Chip and Cam Sprocket? - The Unofficial BMW M5 Messageboard (m5board.com)

JPK//E28M5 · 6th May 2000, 17:34

Just installed my Dinan chip and sport cam sprocket. I am a bit disappointed. Dinan claims 49 horsepower gain with the chip alone. The car does seem to have a flatter torque curve and seems to have more pull across the entire rev range (no dropping off between 3000 annd 5000 rpm like before) but it sure doesn't feel like an additional 49 horsepower. Feels more like 10-15 + horsepower. Any of you out there have similar experiences.

Jon K.

96 750iL
95 F355
88 M5
62 Fleetwood

thisiskissel · 4th June 2000, 19:48

I had the same problem. Changed and adjusted the throttle position sensor. All was well after that. Give it a shot, it's money well spent anyway as a matenance concern.

JKiesler · 1st May 2001, 16:20

thisiskissel,

In response to my post, re: rough idle, others have suggested the problem might lie with the throttle position sensor. My questions are, what exactly does this sensor do, what is it's role in the fuel injection system? Did you replace this sensor yourself? If you did do the work yourself how easy/difficult was the job?

Thanks,

John Kiesler, jkiesler@earthlink.net
'88 M5
'85 635

Quote:

Originally posted by thisiskissel:
I had the same problem. Changed and adjusted the throttle position sensor. All was well after that. Give it a shot, it's money well spent anyway as a matenance concern.