Originally Posted By: Drew99GT
http://www.carid.com/injen-air-intakes/injen-air-filter-375948.html
Injen EA filters; made by Amsoil with built in velocity stack. best cone filter you can buy IMO; most power with the best filtering.
Definitely going to look into these!
Originally Posted By: hattaresguy
Stock BMW air filter.
Can't, not enough flow
Originally Posted By: HyundaiGuy
Originally Posted By: hattaresguy
Stock BMW air filter.
This.
Follow my logic. On a stock engine, if you gain hp due to increased air flow, the air flow can only be increased if the filter is less restrictive. In other words, the "high performance" filters actually filter less.
To get increased performance, you will need head work, exhaust work, etc.
While I have done that in the past to an old MGB, I'm now at the age where I've realized I'm not smarter than a professional design engineer. I stick to factory parts. Want more power? Buy a faster car.
I mean, I've doubled the boost from the turbos... And removed the cats, and running different fuel. Roughly 200bhp over the stock power rating.
I've far exceed the flow capabilities of the stock box & filter according to the numorous comparison dyno graphs I have viewed.
I am a product engineer an I've taken these factors. Honestly, I'd run dual paper cone filters if they existed. So I'm looking for an increased surface area to accommodate the shear volume of air I'm adding into the system.