Does anyone know how many CFMs does the aux. fan put out?

[Erick]

The pusher fan that is.

TIA,
Erick

[NC325iC]

it was enough to keep my engine cool (though my engine rarely passes 1/4 mark)

[Erick]

Yeah, I know its fairly powerful, but we're trying to argue numbers in comparison with aftermarket units.

[SchnellerVert]

It's not that it's not effective but Unreliable. The resistors tend to break and at 18 a wack why? Aftermarket offer viable and reliable cooling.

[Erick]

Undoubtedly, but I want a number for comparison in improvements. I just got my new SPAL fan and I'm trying to estimate how much more it'll flow (if any). I'm very limited by space given my huge Koyo aluminum radiator.

I have no space for even the lowest profile puller fan. I'm having to squeeze a low-pro small pusher in between the radiator and the intercooler (inside the radiator support, with less than 2 inches in between the intercooler and radiator)

But yeah. Looking for numbers if possible.

[nando]

It's not that it's not effective but Unreliable. The resistors tend to break and at 18 a wack why? Aftermarket offer viable and reliable cooling.

you don't need the resistor. bypass it entirely, the fan will only run in high speed mode.

[SchnellerVert]

Yes but it will need a higher rated fuse somewhere in the loop.

[jlevie]

Having the condenser in the flow path affects this to some degree and I can't really say what the aux fan is rated for, but I can estimate a upper bound. A 14" Spal 1400CFM fan wasn't quite enough flow but the aux fan on high would suffice. A 16" Spal 2500CFM was more than enough and resulted in slightly lower temps (~3-5F) than the aux fan alone. So I'd place the upper bound of the aux fan flow at about 2200CFM.

[Erick]

Thanks... I'm hoping a 1300CFM low profile mounted directly to the radiator will help me out. I'm having bad trouble with overheating.

[Jean]

Just mount two resistors in place of one if you don't want to bypass it completely for running at full speed at all times...

[nando]

Yes but it will need a higher rated fuse somewhere in the loop.

There's a high speed circuit already. I just fused the wires on the thermo switch in the radiator so it completely bypasses the low speed circuit. or you could change it to a 15 amp fuse (my fan draws 13 amps). None of these issues are insurmountable..

[jlevie]

Thanks... I'm hoping a 1300CFM low profile mounted directly to the radiator will help me out. I'm having bad trouble with overheating.

The aux fan alone on high speed should be enough. If that's not sufficient you have other problems and I suspect that adding a 1300CFM fan between the condensor and the radiator isn't going to help.

Tell me more about the car and the overheating problems, like what mods and when you get overheats.

[nando]

The aux fan alone on high speed should be enough. If that's not sufficient you have other problems and I suspect that adding a 1300CFM fan between the condensor and the radiator isn't going to help.

Tell me more about the car and the overheating problems, like what mods and when you get overheats.

haha, how about his car is turbo and it overheats when boosting for a long time while he's drifting? :p

do you still have A/C? you might be able to fit a low profile 16" puller fan on the other side. look on summit's online cataloge for something that might fit. you can narrow it down by height, width and thickness..

[SchnellerVert]

Nando, I never said they were not insurmountable. I had issues with mine, I think that I had an higher load draw somewhere else in the system and combined with the oem unit It kept popping. I found it easier to put a spal in my car.

Living in DC area where humidity and heat and lack of moving ie TRAFFIC the car would get hot. Rather than worry about it I just swapped out the unit.

Summit and Jegs are great sources for things like these.

[nando]

Nando, I never said they were not insurmountable. I had issues with mine, I think that I had an higher load draw somewhere else in the system and combined with the oem unit It kept popping. I found it easier to put a spal in my car.

Living in DC area where humidity and heat and lack of moving ie TRAFFIC the car would get hot. Rather than worry about it I just swapped out the unit.

Summit and Jegs are great sources for things like these.

true- the stock fan draws quite a bit of power, and it's louder than shit. I replaced mine with a 2000cfm flexalite from summit, it's both quieter and draws less power than stock, and appears to flow about the same. I have had issues with frying relays, but there were a couple super hot days this summer where I was stuck idling for more than an hour at a time..