My recipe. Hayden clutch fan, 26” stock radiator, 180 Stant, green conventional coolant. Highway cool. Hot day in traffic creeps to 205. Edelbrock EFI.
. tired, but warmed up 440. Sea level.
1969 Road runner overheating problem
- Thread starter 72duster72
- Start date
diesel_lv
Well-Known Member
Please read the OP. It is a serpentine setup. Reverse rotation and they do not have room for fan clutch.
diesel_lv
Well-Known Member
I had 2 12" Spals, in 2 different custom made shrouds. 2 12" other brand that pulled even more air in a vacuum molded shroud. Nothing worked. At slow cruise, it would cool just fine so I knew my radiator was capable. At interstate speeds, the e-fan shrouds caused a high pressure zone in front of the radiator, even w holes, flaps etc in shroud. It would not allow enough air through. The factory shroud opening is about 21" diameter. You need At least that much open area to allow enough air through at interstate speeds so it doesn't creat that high pressure zone in front
72duster72
Well-Known Member
Understand thanks
diesel_lv
Well-Known Member
The vanes on a Flowkooler pump are straight, non directional. The info I am giving him is from my 496" stroker using the same serpentine setup and w/p the OP has. I live where it's 125° in the summer.
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