Guest ashnicholls Posted September 23, 2006 How do the airbox's work, I read some crap article about it, but it never explained why. How does boxing it in a chamber, put a positive pressure on the system, especially when you are putting one filter on that must be smaller than a pair of K&N's. Cheers Ash Share this post Link to post Share on other sites
petert 586 Posted September 23, 2006 The idea is to have enough space around the trumpet so a column of air can enter uninterrupted. There's various theories on the subject, but there needs to be a minimum of 6-7cm of clear space above the trumpet entry. The air box is normally made from a non heat conducting material and fed with cold air. Remember only one cylinder is on the intake stroke at any one time, thus you don't need huge filters. At the track last week, I had a good look under the bonnet of a 640hp 5L Touring car. It's carbon fibre air box is fed by two small panel filters, approx. 150x200mm Share this post Link to post Share on other sites
Normski 1 Posted September 24, 2006 Airboxes work well if they are designed properly, take a look at modern motorcycles. These have inlets at the front and as the bike moves through the air this fills the airbox. When going really fast ~150mph it actually pressurises the airbox by a small amount (filling the airbox with more air than the engine is consuming) supercharging the engine. My bike adds about 5% more power at top speed. You won't get a lot of that with a peugeot but a good airbox will supply the engine with the coldest possible air (ambient). Which is what you want. Share this post Link to post Share on other sites
