Date:         Wed, 5 Sep 2001 22:46:48 -0400
Reply-To:     Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject:      Re: High Altitude Problems -'90 WBX
Comments: To: "Forhan, Thomas" <Thomas.Forhan@MAIL.HOUSE.GOV>
In-Reply-To:  <6BAA4FF604A4D2119AD10008C7A4EFBB094237AD@hrm06.house.gov>
Content-type: multipart/alternative;

High Altitude Problems -'90 WBXThe only altitude correction is the O2 sensor
correcting the final fuel mixture. As for stalling the idle stabilizer
should have been able to maintain idle. As for the power loss, all normally
aspirated engines will lose approximately 3# for each 1,000 feet of
elevation. This is due to the loss of cylinder charge, compression, and O2.
Yes, at 12,000 feet you will lose 36% of your engine. You should have seen
my motor struggle through Denver. This is also way gasoline sold at higher
altitudes is a lower octane. High octane is not needed at the reduced
pressures.

Dennis

  -----Original Message-----
  From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf Of
Forhan, Thomas
  Sent: Tuesday, September 04, 2001 1:30 PM
  To: vanagon@GERRY.VANAGON.COM
  Subject: High Altitude Problems -'90 WBX


  Can the Digifant system be reset for high altitude operations?

   I thought there was supposed to be altitude correction, but on my recent
vacation in my '90 Syncro Westie, above 12,000 feet I had consistent
stalling at idle and a very significant loss of power. Engine freshly tuned,
off course.

  Any ideas?

  Thanks

  Tom F.
  90 Syncro Westie
  83.5 9 Pax S/R GL


[text/html]