On Fri, Aug 7, 2009 at 11:38 PM, David Beierl<dbeierl@attglobal.net> wrote:
> At 02:29 AM 8/8/2009, neil N wrote:
.....

>> But then I ain't no expert! �:)
>
> Me neither -- but it's established fact that some of these beasts light off
> more easily if they've been run on AC for a while. �The draught thing seems
> a reasonable guess for why...
>

Yah looking at this pic of my 182A

http://tinyurl.com/l58qp8

I can sort of see how *over time*, enough heat would transfer from
heating element housing (the 182B is a bit different IIRC, but same
idea) to exhaust flue.

One other pic of mine shows the depressed portions of the exhaust pipe

http://tinyurl.com/l8zph4

Now I'm curious how that *might* affect a "cold" start on LP. i.e.
given that it's not a straight pipe (AFAIK), I can sort of see how air
flow might be enhanced by running on AC first. And speaking of
enhanced air flow, maybe that's why there was a design change on the
182B intake/exhaust. It only has insulation/tin around the
exhaust/ammonia tube but not the intake as in the pic of 182A. Maybe
enclosing intake pipe with all that heat affected air flow in.

And considering that the insulation is "gold", maybe a significant
manufacturing cost reduction! <grin>

Neil.

-- 
Neil Nicholson '81 VanaJetta 2.0 "Jaco"

http://tubaneil.googlepages.com/

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