Date: Wed, 20 Jul 2011 20:10:49 -0700
Reply-To: Rocket J Squirrel <camping.elliott@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Rocket J Squirrel <camping.elliott@GMAIL.COM>
Subject: Re: Watching Oil Temp (long, as usual)
In-Reply-To: <CACGkSd3XFgA=UYZhMr4PRtOfNp=4fAxbHjKpy=RY+usvZgoBQw@mail.gmail.com>
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Well, with my exciting new external oil cooler and swell new oil temp
gauge I'll be in better position than last year, and better equipped to
learn how my driving behavior affects oil temp.
I'm talking science, man!
On Wed, 2011-07-20 at 16:39 -0700, Jake de Villiers wrote:
> 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
>
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