Vanagon EuroVan
Previous messageNext messagePrevious in topicNext in topicPrevious by same authorNext by same authorPrevious page (January 2000, week 2)Back to main VANAGON pageJoin or leave VANAGON (or change settings)ReplyPost a new messageSearchProportional fontNon-proportional font
Date:         Sun, 9 Jan 2000 21:32:43 +0000
Reply-To:     Jim Arnott <jrasite@EONI.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jim Arnott <jrasite@EONI.COM>
Organization: DreamCatcher
Subject:      Re: I4 engine conversion exhausts, noise tube length etc.
Comments: To: Martin Jagersand <vwjag@HAMMER.CS.JHU.EDU>
Content-Type: text/plain; charset=us-ascii

Well said Martin. I might add that if one has to design an exhaust system, Phillip Smith's "The Scientific Design of Exhaust and Intake Systems" will be an invaluable reference. If you gotta build one, you might as well build a 'correct' one.

BTW, Distributed by Classic Motorbooks. Amazon probably has it.

Jim [...] Martin Jagersand wrote: > > Exhaust systems are designed with many considerations in mind. > Other than the average flow (DC component) there is a significant > pulsating (AC) component. Lengths of tubing acts equivalent to > inductors, cavities like capacitors, and the combinations like > filters. And there is always a resistive component... > > Study the layout of the VW car exhausts: First a length of tubing > then a resonator, then another length of tubing, then a muffler > and tailpipe. This is equivalent to two low pass filters in series. > The objective should be to copy one or both of these. > > Practiacally on the vanagon it's possible to match the first > length to the resonator and then put on the muffler. For some > layout ideas see the pictures on: > > http://www.cs.jhu.edu/~jager/vw/engine/Diesel1_9swap/ > > If one wants to put in both components the exhaust would first > have to be routed under the mid section of the van, then a resonator > then a go back towards the rear, rear muffler etc. > > For performance (best scavenging) it is most important to match the > first length of tubing after the engine. > > Good luck, > Martin


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Please note - During the past 17 years of operation, several gigabytes of Vanagon mail messages have been archived.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.