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Date:         Tue, 6 Mar 2001 09:22:11 -0800
Reply-To:     Mark Keller <kelphoto@ISLANDNET.COM>
Sender:       Vanagon Mailing List <>
From:         Mark Keller <kelphoto@ISLANDNET.COM>
Subject:      O2 sensors effect on power
Content-Type: text/plain; charset=us-ascii

The O2 sensor is only used on engines with catalytic convertors. The pre cat Bosch fuel injection system is quite capable of giving accurate fuel mixture in operational service. The O2 sensor's main function, IMO is to safeguard a too rich mixture and thus a cat meltdown.

IMO the reason a the vanagon horsepower rating drops from 95 to 90 is that the O2 sensor loop or rich lean cycling means that the engine is running lean half of the time. The rich side of the loop is at .75 volts, while max power is at .84 volts of O2 sensor output.

It is impossible for a Digifant O2 sensored fuel injection system to provided more power than a non-senosred digijet, because the digifant will never set optimum power fuel mixture, while the digijet system can be set to deliver optimum fuel mixture all the time.


Mark Keller 91 Carat Cowichan, Bay B.C.

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