[Vwdiesel] Muffler or Streight pipe

[Dave Cook]

Dad's Passat had the muffler removed a few years ago.  It too passed the "wife test" as my mom didn't notice a difference in sound until she was told.  When that engine finally goes in the bus, it will likely have a very short pipe off the turbo and nothing else.

Dave Cook


--- On Wed, 12/9/09, William J Toensing <toensing at wildblue.net> wrote:

> From: William J Toensing <toensing at wildblue.net>
> Subject: [Vwdiesel] Muffler or Streight pipe
> To: vwdiesel at vwfans.com
> Date: Wednesday, December 9, 2009, 11:23 PM
> Here is something that might make for
> an interesting discussion. I used to own an Argosy
> (Airstream)motorhome that the previous owner had installed
> an Isuzu 6 cylinder industrial turbodiesel. The engine had
> no muffler, only a straight pipe. I was told that the turbo
> reduced the noise level enough to be legal & with no
> muffler, would get better MPG. I wished I had kept it as at
> times, it got 17 MPG! This on a 26 foot motorhome on a
> 1&1/2 ton Chevy chassis with a THM 400 Hydromatic plus a
> Gear Vendors  gear spliter. But my wife didn't like the
> noise.
> Become of my prior experience with the Argosy, I wonder if
> replacing the muffler with a straight pipe on VW &
> Mercedes turbodiesels would significantly improve MPG? Also,
> does the turbo quiet the engine enough to be legal? I
> suspect someone out there has experimented with this. I also
> know that some engines have tuned exhausts & that
> decreased or increased back pressure could decrease MPG. The
> Panhard PL-17 was one such car.
> Bill Toensing, Nevada City, CA.
> _______________________________________________
> Vwdiesel mailing list
> Vwdiesel at vwfans.com
> http://www.audifans.com/mailman/listinfo/vwdiesel
>