Date:         Mon, 13 Nov 2000 20:18:48 -0500
Reply-To:     Gary Stearns <gstearns@SPRINTMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Gary Stearns <gstearns@SPRINTMAIL.COM>
Subject:      Digifant performance stuff.
Content-Type: multipart/alternative;

Hi-
Over the weekend I received a response to my question about Digi- operating specs from Mark Keller.  Seems he has been running his WBX in open loop with a voltmeter on the O2 sensor as I have.  While I was out taking the kids to see grandma, I saw that on a high speed uphill with foot on the floor the  voltmeter dropped to 0.00; mixture drastically leaning out.  Got home still pondering this, checked e-mail  and found that Mark had written me about his finding that at wide open throttle (WOT) the standard fuel pressure regulator can't keep up with what the engine needs.  He says that he acted on R. Lilley's recommendation to install a performance adjustable fuel pressure regulator with great results. Apparently the stock regulator "tops out" before the engine has all that it needs. Seems they got their improved regulators  from CB Performance  http://www.cbperformance.com/.  Ever been at nearly full throttle and then floored it for the last oomph?  If nothing happens, chances are that you're running out of fuel.  The ECU says "more"  the regulator says "that's all there is". When  the ECU says more to a  Hi Perf. regulator, it says "OK, how much?"  I am going to try this.  I'll report on the results. 

Gary

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