What performance air intake system do you have?

[Maluco]

What performance air intake system do you have?
How much did it cost?
Where did you buy it?

[AdironRider]

None, because they are a complete waste of time, energy, and money.

[rede30]

what he said

[Maluco]

None, because they are a complete waste of time, energy, and money.

WHAT??? I don't get it. It says you can get up to 30 HP from them or whatever, even half that would be welcome... So what can one do to enhance the stock air intake box? Should I simply just buy a replacement K&N air filter and be done or is there anything else?

[Macktheknife]

The stock airbox is very, very well designed. BMW did a good job.

[Lance Racing]

That is the harsh reality. K&N drop in filter in the stock airbox is all you want to do. Does not look as cool as a CAI, but our dyno tests for our E30 race car (stock engine required) showed no improvement with a CAI. A discussion with Steve Dinan at a local tech session confirmed this.

Happy Driving!

[h0lmes]

WHAT??? I don't get it. It says you can get up to 30 HP from them or whatever, even half that would be welcome... So what can one do to enhance the stock air intake box? Should I simply just buy a replacement K&N air filter and be done or is there anything else?

They do nothing for an e30. I have a K&N cone simply because it sounds better. You can also drill holes in your airbox for the same effect.

Edit: Its nice to see your here Lance, you probably don't know me but I was at last summers picnic and I post occasionaly on BMW Puget Sound.

[hamann318is]

Drilled the stock box and have a OEM filter. I rule.

[Maluco]

Drilled the stock box and have a OEM filter. I rule.

That is awesome!!! BMW is ze bomb and I don't have to spend any money, other than a K&N replacement air filter and drills holes in the stock box???? Great! Thanks guys.

One last question, about how big of a hole and how many?

[erik325i]

I have the factory cold air intake. It cost nothing because it came with the car. Very happy with it.

Don't get any aftermarket "cold air intake". Don't even bother putting a K&N panel filter into the stock airbox.
Read this link. The stock paper filter flowes better than any of the aftermarket filters (including the K&N)

-Erik

[Febi Guibo]

drill them on the fender side of the airbox (away from the hot engine)

fyi: mahle paper filter (OEM) tested #1 against most other panel filters, including K&N.

edit: jeez, see link above

[Maluco]

drill them on the fender side of the airbox (away from the hot engine)

fyi: mahle paper filter (OEM) tested #1 against most other panel filters, including K&N.

edit: jeez, see link above

Mahle paper filter it is. Rock on guys!!!!!

What size holes/how many?

[Erick]

Just get the bottom part of the airbox, of what stays below the filter. On the side closest to the fender, drill enough holes (as big as possible) to the point you can literally say you cut off the entire side of the airbox.

[Maluco]

Just get the bottom part of the airbox, of what stays below the filter. On the side closest to the fender, drill enough holes (as big as possible) to the point you can literally say you cut off the entire side of the airbox.

lol, perfect, thanks....

[Jon325i]

As stated, the stock airbox does a pretty damn good job. Sometimes the short rubber boot thingy between the front of the airbox and the opening of the plastic backing panel for the driver's side headlights can work itself loose and this allows more hot (less dense) air surrounding the engine to enter the intake. Either a clamp or some kind of adhesive can help keep these from working loose......don't know if its an issue with many, happens on my car periodically though.

Jon