What CFM fan? Half bridge 13b
 

I'm looking into getting an electric fan for my mazda but all I see is their "cfm" capacities..what cfm is sufficient for a semi daily driver half bridge 13b, I'm in a lot of stop and go traffic and I have a 3 row aluminum radiator...gracias.

I believe the fan I'm using is in the 2500 cfm range. I haven't had a problem with it so far. Even sitting in traffic with the a/c on it keeps the temp under 200 with no issues.

Something more than 2000 cfm should work well.

2-speed Ford Taurus fan.

I had a 1300 cfm fan on my 12A street port and while autocrossing, it would get too hot between runs and basically run 100% of the time if the temp was over about 70F. The fan burned up so I get 2 smaller fans rated at 1000cfm each. Now it cools just fine and only stays on for a couple of minutes each run. Autocross is kinda hard on cooling systems vs. street driving but your bridgeport will take a fair amount of cooling capacity so I'd say at least 2K cfm or more is what you should shoot for.

Awesome guys, thanks.

Lots of folks use these from the junkyard wired on high speed and they work
great and fit the radiator with minimal trimming.

you need to find a 3.8l taurus. I keep mine on low speed full time.

I had no problems with a 1600cfm fan.... on the street.

Now I have Chrysler 300M fans. They will not fit with the battery in the stock location. The fan assembly overhangs the radiator two or three inches on each side. With both fans running on high speed, it draws close to 60 amps. But it WILL cool the engine in real time. I can start a rallycross run or a dyno pull and finish with cooler engine temps than when I started.

I vote for the Taurus fan conversion. Low speed is enough to keep my stock 12A cool on the hottest of days. High speed should be good to keep a modified engine cool if your rad is in good shape. Also a lesser known fan that works well is the early to mid 90's Ford Escort fan. This is what I used on my 82 with 6 port 13B swap and it had no problem keeping that engine cool. The Escort fan fits a little better than the taurus fan but its only a single speed with flow similar to the taurus fan on low. Both use the same diameter fan i believe so if you dont like how the Taurus fan fits you probably could swap the fan motor of a Taurus fan into the Escort shroud for an excellent fit and finish and great performance.

Either way I have my doubts you will find a higher flowing single fan setup than the Taurus dual speed unit. If you want more cooling power than that you will likely have to go to a dual fan setup which as Peejay stated has very high current draw.

Unlike 12-A, there is less room between the engine pulley and the radiator if you're using a B motor. So not all junkyard E-fan will work

I have the dual fans from a MK1 MR2 and they kick butt on cooling. They also have a nice space
between them for that extra long B engine Wacky speaks of.

That's the advantage of a dual fan - the fans sit on either side of the engine.

The reason for my switch to 300M fans was because my water pump pulley nosed into the blades of my Flexolite single 16" fan, breaking most of them.

BTW - The letter has nothing to do with the engine series/type - the 13B is simple the second 1.3l engine Mazda made, even though it's the same architecture as a 12A. (The 13A was completely unrelated to the 10A/12A/13B)

Yup, i just like to abbreviate so i called it "B" motor. I run a single fiero v6 fan which gave a lil over an inch clearance between the main pulley and fan motor. The good about fiero fan is that it covers both radiator and OC, and the entire core of tall 83-85 radiator. 10 years later fiero fan is still kicking ass during L.A.'s rediculous stop and go rush hour freeway traffic. I tried a taurus fan also but it wont clear.

^You make a good point about the oil cooler. Whatever fan you decide to go with make sure it also pulls some air across the oil cooler as well. One of my earlier setups didn't do this and the oil temps were all over the place (usually too high) in traffic...

I have a GSL-SE style setup with the frontmounted cooler and tall radiator. There's a piece of truck mudflap ziptied to the crossbeam over the oil cooler, which prevents air going to the bottom half of the radiator from bypassing the oil cooler. Works just fine.