M5 Expert (>4000)
Join Date: Feb 2001
Location: west palm beach. fl.
Thanked 1,510 Times in 1,122 Posts
Re: Vibration at 70-80 mph?? Frustrated
If you think it is a wheel/tire balance problem, try to get the tires statically balanced on the wheel first, then do an on car dynamic balance. That will take the entire wheel assembly into consideration. If there is another lister nearby, maybe you could swap your wheels and tires with his/hers, and then either eliminate or pinpoint the wheel tire combo as your problem. The fact that you have front and rear vibration would seem to indicate wheels and/or tires.
Dinan Stage 3 suspension, SS jet coated headers, ESS SC kit w/ 1 range colder NGK's, 92mm pulley, 440 Big Greens, TTFS alpha N tune for meth, RK plenum plates, Sachs high performance PP and CCC proprietary clutch disc, stock DMFW, open brake ducts, Hamann front splitters, TEC cupholder, U.S.(Euro style) tilt/slide armrest, 6k HID fogs, 6k super white low beams, V1/Stealth1, dual head LI, 2.65 diff w/40% lockup/2x dynamic, compact spare, Euro trailer hitch, Mocal oil cooler, ACS type rear spoiler, Rogue custom SSK and tranny mounts, ST 355 BBK (fronts), BP sway bar brackets, Bluetooth retrofit, Speedhut boost gauge, Dinan TB's and VS, KB BAP, Howerton/HFS-3 Aquamist WI trunk setup.......