someone explain how the airbox works?
Thread Starter
MBWorld Fanatic!




Joined: Mar 2008
Posts: 1,232
Likes: 168
From: Glasgow, Scotland, UK
SL 350 R230 (3.7L with AMG Speedshift autobox)
someone explain how the airbox works?
I unclipped the airbox today to see what is would sound like, and it sounds awsome, ! when you floor it you get a dump valve BOV sound and when you accerlerate the Kompresor makes a great whine !
My question is how does the air box work, as the pipe entering it, pushes into the box when you accerelerate and forces the air out near the grill. therefore why is there a need for a filter ? I have a 230K
Thanks
My question is how does the air box work, as the pipe entering it, pushes into the box when you accerelerate and forces the air out near the grill. therefore why is there a need for a filter ? I have a 230K
Thanks
Dirty air enters the air box. The air box has a filter that is positioned so that no air can exit the air box and enter the mass air flow sensor (or in your case, the supercharger) without being filtered first. The filtration process is required because without it, dirt (gritty particles in the air) would cause excessive wear. Just to ensure we’re on the same page, I’m talking about the kind of wear that will reduce your supercharger to scrap within a couple of short years – if that long. On a non-boosted car, the kind of wear that will result in a valve job at the 40K mile mark versus the 500K mile mark. Wear that destroys cylinder walls, rings, AND bearings.
Thread Starter
MBWorld Fanatic!




Joined: Mar 2008
Posts: 1,232
Likes: 168
From: Glasgow, Scotland, UK
SL 350 R230 (3.7L with AMG Speedshift autobox)
Can anyone give me more info?
Thread Starter
MBWorld Fanatic!




Joined: Mar 2008
Posts: 1,232
Likes: 168
From: Glasgow, Scotland, UK
SL 350 R230 (3.7L with AMG Speedshift autobox)
Dirty air enters the air box. The air box has a filter that is positioned so that no air can exit the air box and enter the mass air flow sensor (or in your case, the supercharger) without being filtered first. The filtration process is required because without it, dirt (gritty particles in the air) would cause excessive wear. Just to ensure we’re on the same page, I’m talking about the kind of wear that will reduce your supercharger to scrap within a couple of short years – if that long. On a non-boosted car, the kind of wear that will result in a valve job at the 40K mile mark versus the 500K mile mark. Wear that destroys cylinder walls, rings, AND bearings.
However when I rev the engine with the airbox open, the excess air is pushed back the opposite way through the filter and out in the inlet.
When you lift off the throttle you need that BOV to release the compressed charge or you'll dent your hood when the charger releases it for you! Im guess they plumbed it through the air cleaner to act as more of a muffler for the delicate ears in the crowd. When that butterfly closes under boost, bad things will happen without the BOV. Im not sure the boost you run but on larger blowers it's not uncommon to have a scraficial plate designed to blow out before the blower lifts off the motor. You can vent the BOV to atmosphere if you like that kind of sound. Since it is a one way valve, i cant see you having any issues other than it may sound ricerish after a while??
errmm, I think you should try it yourself and your eat your words, the air comes in from one side of the filter then when the supercharger releases the pressure through the BOV it pushes it back out through the air filter the opposite way and through the inlet... try it !
Can anyone give me more info?
Can anyone give me more info?




