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Air Intake

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Wigeon Incognito

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This is probably going to seem a really daft question but I'll give it a go anyway...

I was removing a nasty cone filter from my car last night in order to reinstate the factory airbox etc and noticed a difference between the pipes joining the airbox/cone to the AFM.

On my factory spec box the pipe is just hollow. In the elbow of the pipe attached to the cone (which looks like a standard pipe horribly mutilated to attach to the cone) sits a metal thingy (yes you guessed it, I'm a technical whiz) but I'm not sure if this is standard.

If I was to describe this thingy, I would describe it as a metal sleeve with fins in that create a 'vortex' type shape.

Any ideas?

(Incidentally, attempting to fit the factory box proved proved futile as some ape has sheared off all of the bolts it attaches to so they need to be drilled out which I didn't have time for last night.)
 
Sounds like a device to try and introduce swirl into the airstream to promote better fuel / air mixing. Next to useless, I'd imagine.
 
Aye such thingys appear on ebay on a regular basis along with all sorts of claims about huge amounts of BHP gains for just £2.50 or whatever. Certainly I doubt removing it will have an adverse affect [;)]
 
If you haven't already, you might get more results by visiting Tom at Augment for a new ECU and cam? Andy97 has got some impressive numbers on his 924S race car.
 
Cold air is good, most aftermarket induction kits aren't.

When we were testing our Compact Cup car (BMW 318ti, virtually stock engine) on rolling road, we found beat results with the factory airbox fitted with cold air pipe from the bumper and a fresh OE air filter.

 
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