[Camaro1973]

Originally Posted by SOCAL.M6.ZLE

I agree with you 100%... but even when i park with IAT.3's at 120-130... when I re-start 30-60 min later and they are over 160, it makes me think that if the fans stayed on for 10 min at 50% or so, it would help radiate the heat underhood faster....

I can't imagine that running the fans at 50% for 10min would hurt anything, or drain the battery to a level that would not re-start.

I don't know enough of the numbers to do the math myself...
Battery Ah capacity vs minimum CCA needed to start and the Ah useage of the fan at 50%...

Honestly it’s really a waste of time to think about this. Even with an interchiller if you turn the car off the temps will go way up. I’ve tested this even on my setup. I’ve left the fans on a few minutes and the pump. Water temps go right back up from absorbing all the heat from the heads and rest of motor. If it’s mainly a street car then I see no reason to run the fan or the pump when you turn the car off. Even if you did. As soon as you turn them off the temps are going to go right back up from the heat coming off the motor. You may as well just start the car and drive 5 minutes and you’ll be back to normal temps. Plus the fan doesn’t do a great job pulling air through the exchanger. The fan is meant for the radiator not the exchanger. The exchanger relies on air hitting it from the front.

If your at the track. Then that’s a different story. Then a large trunk tank with ice is what you need or an interchiller. Or simply opening the hood and running a jet fan on the motor.