Good tip Dennis!

If I ran the cat longitudinally, the O2 would be located in my "new"
single outlet manifold. (OBD1 Jetta engine)

Image: http://tinyurl.com/cluzaqr

Another mock up image: http://tinyurl.com/ccq7m6e  "Add flex" bushing
would NOT be installed

My initial concern was heat from cat affecting the tire. Cat would not
be directly behind tire. Maybe a mudflap couldn't hurt?

I would be want to install another support (DV Bosal type) between the
cat and engine if cat installed as shown. The other solution is a
shorter muffler.

Neil.

On Sat, Dec 22, 2012 at 7:22 AM, Dennis Haynes <d23haynes57@hotmail.com> wrote:

> The O2 sensor needs to be before the Cat. Flex couplings and floating
> exhausts work for vehicles as the have long exhaust systems. The short
> system on the Vanagon is best to be fully mounted and allowed to move with
> the engine. Also, avoid having the cat and O2 sensor directly behind the
> tires. The thermal shock from road spray is not good and will foul the
> sensor.
>
> Dennis
>
>

Neil wrote:

> had been thinking of doing that. Image of my mock up:
>
> https://lh6.googleusercontent.com/-sIC-CuoXFrw/UNVnbPyYPXI/AAAAAAAAGas/LYApn
> _HMsXk/s720/Cat%2520Mockup.jpg

--
Neil n

65 kb image Myford Ready For Assembly  http://tinyurl.com/64sx4rp

'88 Slate Blue Westy to be named.

'81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/

Vanagon VAG Gas I4/VR Swap Google Group:

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines