<VV> 64 Engine in 65 / Oil leaks

[Western Canada CORSA]

Andy,

So what you're saying is that the black absorbs more heat out of the oil in
the pushrod tubes than it absorbs from the exhaust logs below it?  And it
can then expell that heat in the passing air more efficiently?

Does the oil actually do that much cooling in a 'vair engine?  I thought
that was a Porsche thing?

Regards,
Joel

-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org] On Behalf Of Andy Clark
Sent: Saturday, March 24, 2007 6:07 PM
To: VV
Subject: Re: <VV> 64 Engine in 65 / Oil leaks


Yes, true about adsorption, but the airflow is down, away from the manifold.
My tests indicated that any radiated heat from the exhaust manifolds is
small compared to the conducted heat carried by the air from the tubes, and
has little, if any, effect. The upshot is that the oil temp is reduced by a
light light coat of BBQ black on the tubes. Remember that the Corvair engine
is really oil cooled, so any additional heat taken from the oil in the tubes
helps.

As always, YMMV.

Andy Clark
Camano Island, WA.
1966 140/4 Monza Sedan
1966 140/4 Yenko Clone
1966 180/4 Cord 8/10 #60
----- Original Message ----- 
From: "Harry Yarnell" <hyarnell1 at earthlink.net>
To: "Andy Clark" <slowboat at mindspring.com>; <westerncanadacorsa at shaw.ca>;
<VirtualVairs at corvair.org>
Sent: Saturday, March 24, 2007 3:40 PM
Subject: Re: <VV> 64 Engine in 65 / Oil leaks


> Yea, but isn't black the best at absorbing heat? Like the exhaust 
> manifold right under them?
>
> harry yarnell
> perryman garage and orphanage
> hyarnell1 at earthlink.net
> ----- Original Message -----
> From: "Andy Clark" <slowboat at mindspring.com>
> To: <westerncanadacorsa at shaw.ca>; <VirtualVairs at corvair.org>
> Sent: Saturday, March 24, 2007 6:32 PM
> Subject: Re: <VV> 64 Engine in 65 / Oil leaks
>
>
> > Joel, it's the "black body radiator" theory. The coating (remember, 
> > I
said
> > LIGHT...maybe I should have said VERY LIGHT), increases the 
> > emissivity more than it increases the insulation.
> >
> > Andy Clark
> > Camano Island, WA.
> > 1966 140/4 Monza Sedan
> > 1966 140/4 Yenko Clone
> > 1966 180/4 Cord 8/10 #60
> > ----- Original Message -----
> > From: "Western Canada CORSA" <westerncanadacorsa at shaw.ca>
> > To: "'Ron'" <ronh at owt.com>; "'Andy Clark'" <slowboat at mindspring.com>;
> > <VirtualVairs at corvair.org>
> > Sent: Saturday, March 24, 2007 2:04 PM
> > Subject: RE: <VV> 64 Engine in 65 / Oil leaks
> >
> >
> > It strikes me as being a bit like yellow sunglasses.  Because they 
> > block the blue part of the spectrum, they increase the contrast of 
> > what is being viewed.  However, they do it by blocking the blue end 
> > of the spectrum, making thing that reflect blue light DARKER, so in 
> > fact you have less visable light entering your eye, so you are 
> > seeing less.  It just fools the
> > brain because it has increased the contrast level.
> >
> > I can't grasp how an extra coating on the push rod tubes would help 
> > them radiate more heat.  To me, it's just another insulating layer 
> > the heat from the oil has to pass through before it can "get out".  
> > And as for the old "half the tubes white VHT", I guess it would 
> > depend on what was more reflective, the bare shiney metal, or the 
> > VHT white.
> >
> > Regards,
> > Joel
> >
> > -----Original Message-----
> > From: virtualvairs-bounces at corvair.org 
> > [mailto:virtualvairs-bounces at corvair.org] On Behalf Of Ron
> > Sent: Saturday, March 24, 2007 2:06 PM
> > To: Andy Clark; VirtualVairs at corvair.org
> > Subject: Re: <VV> 64 Engine in 65 / Oil leaks
> >
> >
> > Debatable.
> >
> > RonH
> >
> > ----- Original Message -----
> > From: "Andy Clark" <slowboat at mindspring.com>
> > To: <VirtualVairs at corvair.org>
> > Sent: Saturday, March 24, 2007 2:01 PM
> > Subject: Re: <VV> 64 Engine in 65 / Oil leaks
> >
> >
> >> Ah, but a light coat of barbeque flat black does enhance the heat 
> >> transfer into the cooling air-stream. Lower oil temps result. Found 
> >> that out when I was racing Orange Julius many years ago. Andy Clark 
> >> Camano Island, WA. 1966 140/4 Monza Sedan
> >> 1966 140/4 Yenko Clone
> >> 1966 180/4 Cord 8/10 #60
> >
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