Vanagon EuroVan
Previous messageNext messagePrevious in topicNext in topicPrevious by same authorNext by same authorPrevious page (February 2003, week 1)Back to main VANAGON pageJoin or leave VANAGON (or change settings)ReplyPost a new messageSearchProportional fontNon-proportional font
Date:         Sat, 1 Feb 2003 00:29:56 -0500
Reply-To:     Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject:      Re: diesel-gas conversion problems solved! (mostly)
Comments: To: Open Wheel Racing <openwhel@BELLSOUTH.NET>
In-Reply-To:  <069901c2c9ab$bac72880$bc0e4ed8@volksfix>
Content-type: text/plain; charset=us-ascii

Your right. The Vanagon fuel pump is a positive displacement pump so it will continue to build pressure until relieved or the motor stalls out, and then burns up. Another possibility is that at high speed/load the pump may not keep up with demand causing the engine to lean out. Good bye valves and pistons or at least a lack of full power potential. The check valve and accumulator is an extremely important part of the CIS system. Since this system is all hydraulic, if it gets air-bound after the fuel distributor, the engine can be hard to start. Fuel pressure must be maintained after shut down so that the fuel does not vaporize in the lines causing that vapor lock.

Dennis

-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf Of Open Wheel Racing Sent: Friday, January 31, 2003 11:38 PM To: vanagon@GERRY.VANAGON.COM Subject: Re: diesel-gas conversion problems solved! (mostly)

Hi Dennis,

Its also been my experience that the Vanagon pumps don't put out enough pressure. I think I have the answer as to why some folks are getting them to work on CIS systems. In the multiport Vanagon format, the fuel pressure regulator relieves the pressure quickly enough to keep the operating pressure at or about 30 to 40 lb's of available pressure, which works well with the electric injectors. But not enough to open the manual CIS's injectors. So here are my thoughts on why it works somewhat. With the mechanical control pressure regulator, and fuel distributor design, the low pressure Vanagon pump is dead-heading so to speak, and builds up enough pressure to open the CIS injectors.............. It is most likely very hard on the pump, and should shorten its life greatly. I would spend the money and get da right sh t! I meant I would not presume to out wit those dummies at Bosch! I also agree on the use of an accumulator, and metal fuel lines, pressure and relief.

Howard

> The Vanagon fuel pump is designed to run at less than 40 psi. CIS > requires a pump that can deliver at 80 psi, has a check valve, and you > will also need a fuel accumulator. You also need to replace the hoses > with reinforced lines or steel tubes designed for that pressure. > > Dennis


Back to: Top of message | Previous page | Main VANAGON page

Please note - During the past 17 years of operation, several gigabytes of Vanagon mail messages have been archived. Searching the entire collection will take up to five minutes to complete. Please be patient!


Return to the archives @ gerry.vanagon.com


The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.

Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.