fan on/off settings based on speed/rpm - daily & spirited driving conditions

[onosqv]

Ok, I think I'm going to get the Greddy MSS to control my fans, which will let it do by temperature & speed & rpm.

Temperature I think I'm set (185 degrees or so first fan, 190/195 second fan) - or something to that effect. And maybe off settings for 165 & 175 respectively.

Now for speed... I was thinking under 25mph fan is on since I've read that the fan is basically useless past that speed & it's some car manufacturer settings.

For rpm, I don't know if I'm going to set this since I wouldn't know which setting it should be.

In relation to the speed thing. If I am doing something, say running up a canyon w/ a lot of twisties or auto-xing, speeds can vary anywhere between 30mph - 60mph. Should the fan be on all the time in these cases? Or would they not help - like the reason for 25mph = off.

[WhtTrshPunk2]

I have dual perma cools and i have them set to run anytime the ignition is "on". I still use the stock crank fan because of the fact that i run A/C and its freaking hot here. Anywhere from 90-100, not counting the ACTUAL temperature of the roads the car is riding on, which are undoubtedly hotter than that. Anyhow, since there is no real downside to having the fans on, I let them run all the time.