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Date:         Fri, 3 Mar 2006 21:56:25 -0500
Reply-To:     Jonathan Farrugia <jfarrugi@UMICH.EDU>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jonathan Farrugia <jfarrugi@UMICH.EDU>
Subject:      Re: Knock & Ping?
Comments: To: Michael Diehr <md03@XOCHI.COM>
In-Reply-To:  <344CA8EF-5CFC-49E8-9316-47C1B8284DAD@xochi.com>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed

by any chance do you have a engine that was build with larger displacement than stock or a higher compression ratio? or perhaps a different cam?

jonathan

On Fri, 3 Mar 2006, Michael Diehr wrote:

> Hi Folks, > > I have a new engine still in the break-in period, nearly to the 500 > mile oil change. > > I've started driving it harder, but I'm worried that I'm hearing > knocking / pinging under load at high RPMs. I'm very familiar with > how the VW inline-4s sound when pinging, but not so sure about the > wasserboxer. Are they prone to it like the i-4s? The sound i'm > hearing is pretty subtle, but that may be due to road noise covering > it up. > > If it's not pinging, is there some other high frequency noise that > might be coming at very high throttle / high load? > >


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