What it does
An intercooler or water-to-air heat exchanger only cools as well as the air moving across it. At low speed or in traffic there isn't much, so a fan helps. This part of the Intercooler System function switches that fan based on air temperature.
The settings
| Setting | What it does | Our advice |
|---|---|---|
| Air Temperature On | Fan turns on at this air temperature | Set it where you start to lose timing to heat |
| Air Temperature Off | Fan turns off at this air temperature | A few degrees lower than the on point, so it doesn't flicker |
| Pulsed Output | Pulses the output on and off instead of holding it on | Leave off for a normal relay-driven fan |
| Pulse On Time | On time for each pulse, in ms | Only used with Pulsed Output |
| Pulse Off Time | Off time for each pulse, in ms | Only used with Pulsed Output |
When Pulsed Output is off, the output simply stays on while the fan is needed. Turn pulsing on if the device you're driving wants to be cycled rather than held on continuously.
The temperature the fan reacts to comes from your intake air temperature sensor, so its location matters. A fast-responding sensor like the Haltech 1/4 NPT air temp sensor after the intercooler gives the most useful reading. See also Intercooler Spray and how intercoolers work.
