[Vwdiesel] Muffler or Streight pipe

[decker at toledotel.com]

    I ran a 2.5 inch straight pipe on my 81 pickup with a turboed 1.6. It
ran great, sounded good, turbo spooled up quickly. The surprising thing is I
belive you will feel the additional power if you use a decent 2 inch system
with a short efficient muffler on your N/A 1.5 or 1.6. On my Dasher Wagon
with it's 1.6 N/A I installed an Audi manifold with a 50MM flange and had my
muffler man make me a 2" system with a short efficient muffler.
Brian Decker
----- Original Message ----- 
From: "Rudy Petersen" <petersenrudy at hotmail.com>
To: <vwdiesel at vwfans.com>
Sent: Wednesday, December 09, 2009 3:53 PM
Subject: Re: [Vwdiesel] Muffler or Streight pipe


> On my 84 Jetta Turbo Diesel I put a Techtonics Tuning 2.25" system on it.
> It had a small Resonator up front like stock and no Muffler.  It was
> pleasant, had a little drone at certain speeds but sounded good and was
> pretty quiet.
> Rudy
>
> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
> Behalf Of William J Toensing
> Sent: Wednesday, December 09, 2009 3:23 PM
> To: vwdiesel at vwfans.com
> Subject: [Vwdiesel] Muffler or Streight pipe
>
> 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.
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