Date:         Fri, 17 Apr 2015 10:19:10 -0400
Reply-To:     szpejankowski@GMAIL.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Chris Szpejankowski <szpejankowski@GMAIL.COM>
Subject:      Re: Cat Bypass Pipe "pros & cons"
Comments: To: Jack Reynaert <jack007@COMCAST.NET>
In-Reply-To:  <01be01d07898$ce3fbc70$6abf3550$@net>
Content-Type: text/plain; charset=utf-8

I tested an empty cat on my '84 Westy. The DJ code engine liked it. No O2 sensor use by ECU in that one and I only used it monitor fuel mixture. I noted a slight change in sound. I could not tell or smell the difference otherwise.  

Wysłane z iPhone'a

Dnia 16 kwi 2015 o godz. 18:58 Jack Reynaert <jack007@COMCAST.NET> napisał(a):

> Has anyone ran a 2.1L WBX with the CAT Bypass Pipe?
> http://www.busdepot.com/039251058
> 
> 
> 
> I've referenced this blog on Samba.
> http://www.thesamba.com/vw/forum/viewtopic.php?t=389018
> 
> Can't draw a clear conclusion, looking for input from direct experience.
> 
> 
> 
> Are there any issues which should be considered "pros vs. cons" to running a
> 2.1l with a CAT By-pass pipe?
> 
> 
> 
> I know that a Bung will need to be installed in the pipe to accommodate the
> O2 sensor, but will the O2 still send the correct signal to the ECU?
> 
> 
> 
> What has been the experience of the elimination of back-pressure by running
> without a CAT help the HP and MPG?
> 
> 
> 
> Note: the vehicle is not tested for emissions, so this is not an issue in
> our state. realize resale could be impacted (but will keep CAT on hand for

> that)
> 
> 
> 
> Thanks!
> 
> 
> 
> Jack