[Fot] To thermostat or not to thermostat...

[Rich Hahn]

 I've been reading this thread and what worked for me in my street TR3A along with a high capacity water pump and electric fan was the old hot rod trick of replacing the thermostat with a "water restrictor disc'  This is nothing more than a aluminum disc with a hole in it.  The kit comes with 3 discs with different size holes.  I got them from Jeggs #555-51105  $6.39.   I've had the TR3 for 49 years and it always ran hot.  Even in hot weather in a 2 mph parade I rarely get above 190 degrees now.  Everyone of these cars is different.  My stock TR4A has nothing more than the TR6 multiblade fan and upgraded water pump and I can't get it over 160 degrees.  It could be used as a farm engine!!!  Conversely I run no thermostat in my 69 Datsun 2000 vintage race car (I know blasphemy) and an electric fan for sitting on the grid.


    On Monday, June 13, 2022, 08:05:48 AM EDT, Philip Gott via Fot <fot at autox.team.net> wrote:  
 
 Speaking of restriction: the originator of the thread mentioned that he recently installed a new radiator. I once installed a custom radiator in another old car. The new radiator was extra thick with many rows of fins and tubes, replacing an old “honeycomb” style radiator. It turns out that this extra thick ( about 3 inches) core was very restrictive on air flow compared to the original honeycomb. The car overheated on the highway, something it never did before. As with the TR, the radiator fan was not shrouded. So, I wonder if the new radiator is thick enough to reduce air flow compared to the original? That could cause operating temperature to rise.Phil Gott

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On Jun 12, 2022, at 10:34 PM, Mike Mehl via Fot <fot at autox.team.net> wrote:



Agree on the restriction. You could pull the guts out of the thermostat

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  On Sat, Jun 11, 2022 at 2:32 PM, ralph hansen via Fot<fot at autox.team.net> wrote:   _______________________________________________
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