James/Doug/list,
Thanks a lot for your suggestions. Here's how I see it:
At speed, there's no problem, so I conclude that the radiator's ok.
When I turn on the heater, I get heat, so I conclude that the water
circulation is ok.
Seems like the "fanning" is all that's left.
I think that the combination of upgraded fans (or at least one upgraded -
I'll get to that in a minute), and a new water pump that will allow for a
larger fan in place of the smaller one, and the radiator re-cored should
solve the problem once and for all.
As I mentioned, I have a larger fan on the left and the smaller one on the
right (both behind the radiator) to allow space for that oem fan shaft on
the water pump. If you put your hand in front of the radiator, on the left
you can really feel the fan pulling the air through. On the right, the pull
from the fan is much weaker.
So I think that a new water pump (with no fan shaft) and a larger fan on the
right will do the trick. So what I really need to know is, what water pump
will fit my 1500 engine but not have the fan shaft sticking out? I
understand that Nigel at SpitBits can be very helpful for stuff like this -
can anyone send me a number for him? I'll have to look at home, I think now
that I *might* have bought something from him before....
Thanks again for the inputs.
George P.
>From: James Carruthers <j.carruthers@rave.ac.uk>
>To: Douglas Braun <doug@dougbraun.com>
>CC: "George P." <ygpz4re@hotmail.com>, spitfires@autox.team.net
>Subject: Re: Cooling the Spit
>Date: Mon, 11 Aug 2003 15:50:44 +0100
>
>Doug, George,
>
>
>The most efficient place for a fan is behind the rad - not in front of
>it...
>
>If the fan is in front of the rad it just blocks the "natural fan" of the
>air coming in the front of the grill...
>
>However as Doug says - the stock fan should work perfectly well - it's
>likley to be something causing this other than the fans.
>
>
>James
>
>69 Signal Red Spit
>
>
>
>Douglas Braun wrote:
>
>>Maybe you should temporarily refit the stock fan (removing the electric
>>ones),
>>and see if that makes any difference. Then you would know if the problem
>>was
>>due to insufficient fanning or something else.
>>
>>If you really must have an electric fan, maybe a single big one on the
>>front
>>of the radiator would work better. Probably somebody on the list who has
>>actually done
>>this can say how well it worked.
>>
>>I once removed my stock fan and drove a couple of miles to see if I could
>>detect a reduction
>>in noise or an increase in power. (Don't get stuck in traffic while doing
>>this!) I could
>>not detect any significant improvement, so I put my electric fan plans on
>>the back burner.
>>
>>Doug Braun
>>'72 Spit
>>
>
>
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