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patkeefe patkeefe is online now
one of the great unwashed
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Join Date: Apr 2004
Location: Ringwood, NJ
Posts: 2,850
Oh, yeah, one more thing...
this pig rich mid range problem existed before I blew up the old plastic airbox, which is why I spoke with BL and decided to get the RPM Solenoid switch, which worked pretty well. After installng the RPM Solenoid switch, the car was driveable, and it worked OK at the track. The flat spot has existed since I changed the airbox to the lower profile stainless steel unit. I suppose I may have altered the characteristics of how the plate (and plunger) lifts by changing the airbox. Maybe more air tries to flow up on one side of the plate, so I get the same volume of air, but it is actually traveling a path across less of the plate, so it moves faster and pushes up the plate more. Kind of analagous to same total pressure in a duct, but more dynamic pressure and less static pressure.
Patrick E. Keefe
78 SC
01 Boxster
Old 01-03-2008, 11:29 AM
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