Don't overlook the importance of oil as part of the cooling system.
When I first tried my Spitfire without the oil cooler it ran very hot
( water temp 240 deg on a cool day at Pocono), but with the oil cooler
it stayed below 220, even in the heat of the summer. I run 2 oil
coolers on my TR3 and an aluminum radiator. Running hard in a race
the water temp will creep up close to 210 and the oil temp up to 200,
but that's about as high as they get. Joe(B)
----- Original Message -----
From: <WEmery7451@aol.com>
To: <BillB@bnj.com>; <grandwazoo@earthlink.net>; <richtr@erols.com>
Cc: <fot@autox.team.net>
Sent: Wednesday, February 26, 2003 11:53 PM
Subject: Re: TR3A cooling
> In a message dated 2/26/03 8:27:45 PM Pacific Standard Time,
BillB@bnj.com
> writes:
>
> << Unless you've done something special to your radiator cap that
really
> doesn't happen. The water doesn't get sucked back in because the
TR3
> radiator cap is just a single flow cap. When the engine cools a
little the
> radiator cap seats--there's no way for the coolant to return. You
can
> modify it to make that happen, as it does with modern cars, but you
need a
> modified radiator neck to accept the kind of radiator cap that acts
as a
> light check valve for coolant flowing back into the system.
> >>
> You are right, Bill. I had about three radiators refitted with the
shorter
> cap neck to use a standard 7 LB or 15 LB cap from an Advanced Auto
Parts
> store. These caps have the center check valve which gets pulled
down when
> the radiator draws a vacuum, allowing the coolant to be drawn back
into the
> radiator. Sometimes I hear the catch tank snarling, hissing, and
clanking
> when the engine is shut down. By the time the engine cools, the
fluid is
> back in the radiator.
>
> I agree that you are better off if you never reach temperatures this
high.
> These radiators are also re-cored without the crank hole. They
still must
> not be extremely good. I never had to block off any radiator
surface area.
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