Volvo 850 Air Box Mod - Seriously GREAT Sound

BackInBlack · Post by **BackInBlack** » 02 May 2009, 11:19

Here is a link to the 850 air box mod with pictures:

http://www.volvoforums.org.uk/showthread.php?t=71714

Comment as you wish.

I do understand a small amount of aerodynamics but I didn't do this modification for any performance gains, purely sound enhancements.

(Yes, I do have an account on both forums)

Post by **matthew1** » 02 May 2009, 11:56

Well that's certainly a mod I haven't seen before! You're going to get a lot of warm air with it.

BackInBlack · Post by **BackInBlack** » 02 May 2009, 15:57

matthew1 wrote:Well that's certainly a mod I haven't seen before! You're going to get a lot of warm air with it.

There's a first time for everything...

I'll keep you updated.

Post by **vegasjetskier** » 02 May 2009, 16:54

Do you still have the cold air hose hooked up to the bottom of the box?

BackInBlack · Post by **BackInBlack** » 03 May 2009, 10:24

vegasjetskier wrote:Do you still have the cold air hose hooked up to the bottom of the box?

Not in the photo but have recently re-connected it. I have only re-connected it to gain fresh air like a 'ram air effect' at higher speeds (I have dremeled the snow-guard/plastic cover off).

Post by **vegasjetskier** » 03 May 2009, 10:35

BackInBlack wrote:
vegasjetskier wrote:Do you still have the cold air hose hooked up to the bottom of the box?
Not in the photo but have recently re-connected it. I have only re-connected it to gain fresh air like a 'ram air effect' at higher speeds (I have dremeled the snow-guard/plastic cover off).

In that case you're going to be sucking warm air from the engine compartment while you're stopped and as you start to accelerate. As you come up to speed, cooler air will be forced into the airbox, partially (or maybe coompletely) reducing the suction of the hot air into the intake. So the performance effects shouldn't be so bad, as long as you don't drag race.

BackInBlack · Post by **BackInBlack** » 03 May 2009, 10:41

vegasjetskier wrote:
BackInBlack wrote:
vegasjetskier wrote:Do you still have the cold air hose hooked up to the bottom of the box?
Not in the photo but have recently re-connected it. I have only re-connected it to gain fresh air like a 'ram air effect' at higher speeds (I have dremeled the snow-guard/plastic cover off).
In that case you're going to be sucking warm air from the engine compartment while you're stopped and as you start to accelerate. As you come up to speed, cooler air will be forced into the airbox, partially (or maybe coompletely) reducing the suction of the hot air into the intake. So the performance effects shouldn't be so bad, as long as you don't drag race.

LOL... Na, no drag racing here... Thanks for your response. Its good to hear an equal sided and thought out response.