veilside180sx wrote:If you switch your fan to a pusher instead of puller you can place the volvo intercooler right behind the radiator. It fits like a glove. I have a spare one still sitting in my garage from 2 yrs ago.=)
There are 2 ways I am interpreting this, and neither is a good idea. Either you are saying to put a pusher fan in front of the radiator and push the air through the radiator and then the I/C. Problem is, a radiator is going to heat up the air passing through it quite quickly. An I/C needs to try and cool the air as cool as possible. Radiators have a bit of leeway in that it only needs to shed enough from the water so that the water entering the motor can absorb enough heat from the motor to maintain a temperature. If you put the I/C behind the radiator, the intake charge will not shed as much heat as might be ideal. At off-boost conditions, it may actually absorb heat as it wille be absorbing heat from the air that had passed through the radiator.
On the other hand, if you push the air through the intercooler to the radiator, then you'll be trying to blow air to the front of the car. As you get to higher speeds, the fan will be fighting the air being pushed towards the radiator by the vehicle's movement. Not only that, the air inside the engine compartment will be hotter than the ambient air. So you're also starting with a poor source of cooling air. At some speed, the air will become stagnant and will not be flowing in either direction and thus not effectively do any cooling to either the I/C or the radiator. AS you get to higher speeds it will start forcing air past the fan, but the fan will still be offering resistance. The ideal condition is to have as much cool air flow across the I/C and radiator as possible to maximize cooling of both.