If you aren't making the heat, you don't have to get rid of it...

On Wed, Jul 20, 2011 at 4:28 PM, Rocket J Squirrel <
camping.elliott@gmail.com> wrote:

>
>
> On Wed, 2011-07-20 at 15:38 -0700, Jake de Villiers wrote:
>
> When I reached out on a 98 degree F. afternoon and shot the black asphalt
> roadway with my IR temp gun it read around 140 degrees - if the air going
> past your sump is 98 and the roadway is 140, that's still a useful
> differential from your 220 degree oil, is it not?
>
>
> I dunno. It depends, I suppose, on the size of the sump "heat sink," and
> how much convective and radiative heat loss such a sump would show in those
> conditions. I don't have any background in engine thermal management to know
> how many degrees of cooling that offers! My heat sinking background is in
> electronics, using passive (natural convection) heatsinks to get rid of a
> few dozen watts of power. You may be right -- it could suck a lot of heat
> out the oil.
>
>
> My point about the RPM is that a relaxed climb at 3200 won't be building
> heat in the engine like 3800 RPM will - that's all. I found that we could
> climb longer and cooler at 25 MPH in second gear in the '84 - it took longer
> but the van was much happier.
>
>
> Well I'll sure try that next time. Though the grades that really cause me
> to sweat are the long ones which are too steep for second gear. So the
> slower I go, the slower the air blowing across the sump. Same for this
> external oil cooler I put on -- it has no fan, depends on air coming down
> the side vent, so slow travel means low airflow.
>
> -- RJS
>

--
Jake

1984 Vanagon GL 1.9 WBX - 'The Grey Van'
1986 Westy Weekender/2.5 SOHC Subie - 'Dixie'

Crescent Beach, BC

www.thebassspa.com
www.crescentbeachguitar.com
http://subyjake.googlepages.com/mydixiedarlin%27