The guy at Stewart---told me to turn the pump as close to 52-53 max as
possible---that why the sprint car guys have up to 30% reductions possible with
different pulley sizes
>
> From: <dthomssen@neb.rr.com>
> Date: 2005/03/14 Mon PM 09:15:19 CST
> To: "Land-speed Racers" <land-speed@autox.team.net>
> Subject: Fw: Am I crazy or just dumb?
>
> This question came up more than 50 years ago in the age of Flathead (wrought
> iron engine) powered dirt-track racing in stock cars and sprinters with
> heating problems. One cure was a washer restrictor to slow down (?) the
> flow. Everybody thought that was the reason, and it worked. Later we found
> that the stock water pumps were cavitating (creating bubbles) from being
> wound so tight and the washer increased the pressure on the pump and reduced
> the tendency to cavitate. The bubbles reduced the contact of water to
> wrought iron and caused real hot spots. Other cures included modifications
> to the pump to reduce cavitation.
>
> Today's water pumps surely must be turning RPM's beyond their design RPM
> and restrictors may be doing the same thing as they were doing 50 years
> ago- reducing cavitation.
> Dave the Hayseed
> It's Spring in Nebraska
>
>
"Sparky"
Lakester 2211
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