<E30> DIY Cold Air Intake Help???

[VeeDubJeff@xxxxxxx]

I'm considering building a cold air intake for my 86 325es.  Here is my plan..
I'm looking for any suggestions to make this better or correct if it is wrong.

Parts:
PVC Tubing, Connectors, Angled Pieces
K&N Cone filter
Couple Hose Clamps

I plan to remove the air box, connect start of tubing to the existing air
intake duct (rubber part that connects to intake manifold.  Route the tubing
down towards the front, bottom of the engine bay.

I have a couple questions.
How will I get the K&N Cone filter secured to the pipe?
The most obvious place to put the filter is down behind/under the drivers side
headlight.  But that is where the intake ducting is routed now anyway... so
would that be pointless?  Or does the K&N cone filter draw in a lot more air? 
I currently have a drop in K&N filter.  Will I experience any gains over the
drop in???
What about wet weather?  This place seems like it will stay dry... but when
driving in the rain will it get wet and damage my engine?  This isn't a racing
vehicle... it's my only car (daily driver) but I am attempting to make this
car as fast as possible for as little money as possible.
and lastly, what kind of gains can I expect?

Thanks In Advance,
Jeff Patch
http://jamspot.simplenet.com  <--- check out my BMW/E30 Site

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