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David David is offline
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Join Date: Apr 2002
Location: Houston (Clearlake), TX
Posts: 8,721
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The easiest is to take it to a tuner shop and have them put it on a dyno with a lambda sensor in the exhaust pipe.

There are stand alone lambda sensors you can install. I think they're anywhere from $400 to $2000.
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2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)
Old 04-20-2010, 04:53 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)