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07-28-2014, 12:42 PM
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#5
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Picture me rollin'
Drives: e36 m3, e39 m5, f80 m3 CS
Join Date: Feb 2009
Location: At the gas station
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Quote:
Originally Posted by DR1er
Yes, as said above: no valves on the 640i. I just installed M6 mufflers in mine and I'm trying to find out if the little vacuum pumps that operate the muffler flaps can be retrofitted so that I can have a little louder sound when driving harder. When I first had the M6 mufflers installed, I left the valves open but got quite a lot of drone inside of the cabin. Had them closed and that solved it... but the sound with them open is much much better (a least for my taste)... not loud but a lot sportier.
Said so, does anyone know if it is possible to retrofit the vacuum open/close function to the 6 cylinders engine? yes I know the majority of 650/M6 owners would desperately want to get rid of the valves while I'm looking for the opposite  I would think (and hope) the Active Noise Cancellation function can be coded easily, but my main concern is related to wiring. |
http://www.exhaustmeister.com/
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