Pat 12 gets a nose job

[Phil Waterman]

Hi Tony

Going old school on graphing the data makes it even more interesting.

Agree on splitting the thread to put the cooling system discussion in one thread and the rest of the nose job in another makes senses, will see if I can figure out how to do it.

Worked yesterday and hope to finish today the water pump conversion. The directions with the conversion plate spend a lot of time on the fan/water pump speed. When I did this conversion on the 261 I did run the engine on the test stand with big pulley on the crank and a small one water pump. That combination seriously over speeded the fan. Particularly with the 6 blade CMP fan, which when you cracked the throttle sounded like a plane, with a really strong prop wash. Air flow was so strong that it was sucking oil out of the oil breather. Was really concerned about the fan failing from being overspeeded so swapped the pulleys around from engine to engine to get the speed down.

Now out to work on the truck.

Cheers Phil

[Bob Carriere]

I have a recorred 3 rows of tubes with the six blade fan..... no sheet metal yet except for the front fenders.

Not sure if I have the 216 I have the large 261 crank pulley front pulley but the engine maintains a steady 161.005 degrees F with the 160 thermostat. Double PH-8 spin on oil filters.

This Spring when we first took it out of storage is ran at about 900 rpm for nearly an hour to cook off any condensation then the oil was changed.

I drive it in the back field exclusively in low range ( t-case was changed to a 2 speed). Low range allows me to cycle/crash in all 4 gears when travelling on the paved road from the house driveway entrance to the back field lane.

On wide open throttle the heat damper on the exhaust manifold vibrates the little coil spring like crazy...need one of the antirattle spring..... the Carter YF carb sounds like a vacuum cleaner trying to suck tennis balls. Filling the bowl of the air filter with oil has toned down the sucking sound somewhat.

Never gets up above 161 F.

Cheers