cooling fan question

[Larry Hill]

When racing the truck I was told that I had to have a fan. I had a stock water pump with the standard tooth belt and auxiliary 12 volt motor. Tech said go buy a fan and I did and install it. The fan added about 12 OZ to the nose of the truck. It was not any faster or slower with the fan and with the engine being a v6 the blades were so far away they did not generate any air flow across the radiator core.
But to race I had to follow instructions.

[Rory McNeil]

Originally Posted by Larry Hill

When racing the truck I was told that I had to have a fan. I had a stock water pump with the standard tooth belt and auxiliary 12 volt motor. Tech said go buy a fan and I did and install it. The fan added about 12 OZ to the nose of the truck. It was not any faster or slower with the fan and with the engine being a v6 the blades were so far away they did not generate any air flow across the radiator core.
But to race I had to follow instructions.

That really makes no sense at all, considering that you are allowed to run an electric water pump, that has no provisions for a belt driven fan. I never ran a belt driven fan on my Mustang, even with the stock water pump and a Moroso electric belt drive. Considering how slow the water pump spins with such a drive, and 5.0 Mustangs used a reverse rotation fan, doubt it would do anything, anyhow. Larry, was this a NHRA Tech official?

[Larry Hill]

It was at Indy. Who it was I don’t remember.