The give away that this is an "unloaded" test is there are no readings for
NOx. The major purpose of the dyno tests is to test the NOx reduction
equipment. That is EGR, catalyst, and proper timing settings. Of course
water boxers do not have EGR so those test really come down to the
catalyst, O2 sensor, and ignition timing.

The 81 air cooled is a bit different as it has a cat but no O2 sensor
unless it is a California version. Just for giggles, in NY the idle test
limits for 81 and later are 220 HC and 1.2 CO so it would have failed
here. These readings do indicate that there is some room for improvement.

The idle speed and mixture should be 850-950 rpm and the CO should be
closer to 1% or even lower pre cat.
The CO at .5% and HC at 57 indicate that at speed the engine is running
really well but most likely the cat is tired or the engine is not running
well and the cat is really working hard. Since the .5% CO is really the FI
goal, my bet is a bad cat.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Jake de Villiers
Sent: Saturday, March 22, 2008 1:06 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: passed DE inspection :-)

Congrats on the pass Karl - it always feels good to me when the vehicle
passes.

Conversely, I always end up in the room beside the dyno feeling anxious,
as
though I should have studied harder!

Is that a dyno test in Delaware an unloaded test?

On Sat, Mar 22, 2008 at 8:55 AM, Karl Ploessl <karl.ploessl@gmail.com>
wrote:

> just passed DE inspection: besides the lights, horn and wiper function
> test,
> the fuel cap was pressure tested and the CH/CO values were measured:at
low
> rpm (1019): HC: 125 (400 max allowed), CO 1.33, CO + CO2: 13.86
> at high rpm (2658): HC 57 (400 max allowed), CO 0.5, CO + CO2: 14.68
>
> --
> Karl
> 1981 VW Westy "Jenny"
> 2000 VW Jetta GLS VR6
> Wilmington, DE
>

--
Jake
1984 Vanagon GL
1986 Westy Weekender "Dixie"
Crescent Beach, BC
www.crescentbeachguitar.com
http://subyjake.googlepages.com/mydixiedarlin%27