Neil,
this is that what I tried to explain with the openning (small) and big airbox
behind - if you get too much pressure the air will try to escape - the
turbulences can be eliminated when you build walls parallel to the incoming
airflow insind the air box.
See ya
Pork Pie
>
> -----Original Message-----
> From: Albaugh, Neil
> Sent: Monday, February 21, 2005 2:16 PM
> To: 'todd'; Jon E. Wennerberg; Keith Turk
> Cc: land-speed@autox.team.net
> Subject: RE: Jon's air intake question
>
> Todd;
>
> You bring up a good point about creating "dirty air" around a scoop
> intake. It seems to me that if there is a significant amount of
> turbulence in the intake it will create a variation in the engine
> manifold absolute pressure (MAP) that could be a problem.
>
>
> If the turbulence is bad it will create fast pressure waves that can be
> picked up by the MAP sensor. Depending on the system bandwidth (response
> time), the dynamic pressure may be simply averaged if the response time
> isn't very fast. If that is the case, half the time during a pressure
> wave cycle the AF ratio will be too rich and the other half it will be
> too lean. Of course, there are normal intake pressure waves as the
> valves open & close; if an EFI system can deal with those maybe scoop
> turbulence really isn't a problem and I'm "crying wolf".
>
> Any ideas on this, anybody?
>
> Regards, Neil Tucson, AZ
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