Do I need to install a really big fan on my car to mod it?
Um, yes actually. If you're tuning a turbo car with an intercooler, you need a large fan to provide airflow while getting the boost and fuel map right.
My car is turbocharged. I only have one fan in it, and it's disconnected most of the time (it runs cool). The airflow required by the engine is supplied by the suction of the engine itself, and the suction of the turbo itself. Boost doesn't have a map, it has a level.
Also, nothing is supplied by "suction of the engine". Atmospheric pressure PUSHES air into the turbo intake, and the turbo further compresses that and feeds it to the engine. The engine doesn't "suck it in".
You don't need a fan all the time on an intercooler or otherwise because the car is already moving, and the intercooler is exposed at the front of the vehicle. The fan is for when you aren't moving.
Boost may well have a map. Depending on whether the ecu is told what gear you're in, you have 1 or 2 variables that determine max boost - rpm and gear. You may want to restrict the boost in low gears to avoid wheelspin, and you also want to taper boost at high rpms to avoid overloading the injectors.
I think the original post was tounge in cheek but man I can't figure out if your reply is.
I have a intercooler for my turbocharger, but it takes adavantage of a hood scoop to ram air over it. I know a lot of guys move their intercooler in front of the car to get even more air flow, but I've yet to hear of a fan in front of an intercooler. Correct me if I'm wrong, but I would imagine fan blades are just going to cause more obstructions when you are going 60mph anyway.
Install a larger fan for modding? (Score:5, Funny)
Re:Install a larger fan for modding? (Score:2)
Do I need to install a really big fan on my car to mod it?
Um, yes actually. If you're tuning a turbo car with an intercooler, you need a large fan to provide airflow while getting the boost and fuel map right.
Re:Install a larger fan for modding? (Score:2)
My car is turbocharged. I only have one fan in it, and it's disconnected most of the time (it runs cool). The airflow required by the engine is supplied by the suction of the engine itself, and the suction of the turbo itself. Boost doesn't have a map, it has a level.
-Jesse
Re:Install a larger fan for modding? (Score:1)
Also, nothing is supplied by "suction of the engine". Atmospheric pressure PUSHES air into the turbo intake, and the turbo further compresses that and feeds it to the engine. The engine doesn't "suck it in".
You don't need a fan all the time on an intercooler or otherwise because the car is already moving, and the intercooler is exposed at the front of the vehicle. The fan is for when you aren't moving.
Re:Install a larger fan for modding? (Score:2)
Boost doesn't have a map, it has a level.
Boost may well have a map. Depending on whether the ecu is told what gear you're in, you have 1 or 2 variables that determine max boost - rpm and gear. You may want to restrict the boost in low gears to avoid wheelspin, and you also want to taper boost at high rpms to avoid overloading the injectors.
Re:Install a larger fan for modding? (Score:1)
Re:Install a larger fan for modding? (Score:2)
I would imagine fan blades are just going to cause more obstructions when you are going 60mph anyway.
The point is that you're not going 60 on a dyno. You're stationary, doing 4krpm in 3rd gear. Fans are necessary.
Re:Install a larger fan for modding? (Score:1)