On Tue, Dec 1, 2009 at 11:51 AM, Troy <colorworks@gci.net> wrote:

>
> Lastly, someone modified the heater box to draw inside air. I think this would be a wonderful modification. If anyone remembers where the link was on how to do this, I would like to file away for future reference.
>
> Troy
> 89 Westy
>

That might have been me. I set up my heat box to draw air in through
side vents. Particularly with fresh air ram blocked. Here's some pics
I threw up. Might shed some light

http://picasaweb.google.com/musomuso/HeatExchangeBox81WFan#

Somewhere I have a video showing air flow when tested on bench. When
fresh air ram was blocked even by 1/2, a lot of air was sucked in
through the side vent holes.

In theory it recirculates cabin air with fresh air duct closed or
partly closed. I never did get around to making a proper control flap
for fresh air ram, but did mount one that fit. It just sealed poorly
and I got bored with the project.

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