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Re: M6 Airbox Mods (For other BMWs as well)

You wrote:

>I have rescently added a K&N air filter to my '88 M6 and I was looking 
at the
>air inlet and thought that it looks REALLY restricted. The inlet from 
behind the
>drivers side headlight bucket seems small for the size of engine. Is 
there any
>way to upgrade the box with an aftermarket version, or has anyone out 
there had
>any experience with rerouting where the airflow comes from? TIA---

I recently had the inlet modified by cutting off the restrictor and 
just ducting air straight into the airbox via the stock diameter intake 
behind the headlight.  I don't know about the E24 6-series with the six 
cylinder motor, you may need to add an extension from just behind the 
headlight to where the intake begins.  My local specialist did this for 
me and he has done a similar job on his own '89 535i.  He needed an 
extension built, while mine was still long enough to be ahead of the 
cool air shield and take in air via positive pressure area behind the 
headlight.  I considered a big cone styled intake with the K&N filter 
on it to replace the entire airbox, but the only problem is if the 
engine is hot or you're idling in traffic on a hot day, all the air 
blowing into the engine will be hot air, making performance degrade 
unacceptably.  With this particular modification, I keep my stock 
airbox (with K&N panel filter) and still get a bit of a roar at or near 
full throttle from the increased amount of air rushing into the intake. 
It may not sound as nice as a cone shaped filter, but I think it's a 
pretty effective, and cheaper, solution.  Good luck.

Regards,

Roy Kao
'95 530i/5-speed/Dinan

BMW CCA & CCC Member
rkao@domain.elided