I ran an evo radiator with 2 12 inch ebay fans, and had over heating issues, then upgraded to a 12inch zirgo on front, and a 14inch zirgo (highest CFM they sell, 2700 or something) on the driver side, and my temps never go above 195 now. The 14inch fan does sound like a jet turbine though....but it freakin works. Heavy, so mount it with some metal brackets, not just little plastic zip ties, they are not strong enough.

 

Size and CFM is important, but the amount of "pull" that the fan can suck through is equally important as well.

If you have a very thick front mount intercooler and still have the stock A/C condensor, you may want to fit the largest fan possible, and also the thickest fan as possible. A thicker fan blade will allow more "pull", or torque I should say, to suck air through all the layers of restriction.

Cars like Skylines, Supras, for example, all come with a clutch fan setup. The moment they start eliminating the clutch fan for an electric fan, they run into all sorts of heat issues. This is mainly due to the reasons described above, considering that all these big turbo cars always run a huge FMIC anyway.

The stock Evo fan is very strong, so if you can fit that thing back in there, do so.

 

do u have pictures of how its mounted?

 

which size fan would you recommend for fp black 2l built motor??

 

I have this, but can take pics tomorrow

http://youtu.be/MOzROFx1UsI

 

awesome videos. subscribed

 

would you say i can get away with two 12in?
is the 12in attached with a zip tie?

 

Yeah, my 12 is ziptied, only through the A/C condenser (is that what it's called?), not all the way through to the radiator. 2 reasons, first is easy radiator removal, second is that the thick bars are horizontal in the A/C piece, so the thin little fins don't get smashed to pieces. Now, take this into consideration, my front radiator and hood latch "thingie" are slightly different than the evos. On the engine side, no difference. So, you can probably fit a larger (thicker) fan in front pushing.

To sum up, basically I see no reason to use a 12 when a 14 fits. It may work, but for me it really makes sense to move as much air as possible, and across as much of the fins as possible. surface area is much increased with a 14 over a 12.

Pi * r * r = 3.14 * 144 = 452 square inches
Pi * r * r = 3.14 * 196 = 615 square inches

That's like 452 * 1.36 = 615 so, 36% more surface area in a 14 inch fan that is getting air. All I know is my car overheated with 2 12's, but I'm in 110+ texas, and sitting in traffic with the A/C on and a tubular manifold, it just couldn't keep up.

 

thanks for the response
would you say that
1. one 14in on the driver side would be enough to cool down?
2. if i zip tie the 14 in and have it rest on the bottom of the radiator for support, would that work?

 

I certainly has the potential to work. Zirgo sells the 14 incher with different brackets than the 12 incher, which have 3 holes instead of 1. You can see one rollin around on the floor in my vid. With those, you could buy 2 mounting kits, and double up at each mounting point. Still, the brackets I used took a spare piece of aluminum I had lying around, a hacksaw, a drill, some bolts/washers/nuts, and like 45 minutes....and they are a lot more solid and re-usable than zip ties. Not to say it's not doable, just that I did it once with zipties on a 12 inch, and didn't even like that.

Would just 1 14 inch work...maybe, probably, depends on climate and driving habits. For reliability I'd say even a cheap 30 dollar e-bay fan in front is better than nothing. As far as fans go, you can't be "too cool", but you can be too hot with not enough fan. Just for comparison sake, I've heard it estimated that each of the stock fans pulls about 2k cfm through there, maybe a little more.