When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
My cheap-o ChynaZon 12" fans work great, if the ambient temps are 80* or less...
Unfortunately, it's now in the 90's or more, most days, and now they can't seem to (ie; won't) keep up.
Had planned to install two, 12" tried & true Derale 16925's, but it appears they are now made with lower grade motors, and when I read most of the current reviews, see a lot of negative, and they aren't as nice as they used to be, evidently...
I ordered a 16" Flex-a-lite single pusher 10 blade fan, that claims to flow 2500 cfm.
Going to still trigger it's relay off of the factory fan's ECU ground trigger wire, and run it as "Fan 1" only....
May, use the "Fan 2" ground trigger, to turn on the 2nd relay for a small transmission cooler fan, in the future...
Just curious if anyone runs just a single pusher fan? And if it's handling it or not.
My thinking is that one large single fan, covers nearly the same area as two small, diagonally mounted fans that are independently controlled, and mainly concentrated in opposite corners of the radiator, like they are now.
No a/c, stock radiator'd, front mount turbo, 4th gen Trans Am, FWIW...
My car will almost stay cool with one of those Derales on high. I have two and they stay on low 99% of the time. But I have a dual pass griffin stood up vertical. don’t think there is another (12”) pusher fan on the market that pushes 2200 cfm+ that Derale claims.
But if that one actually DOES push 2500cfm, your probably fine. Being it’s a 16” it probably does. One way to find out Though!
My car will almost stay cool with one of those Derales on high. I have two and they stay on low 99% of the time. But I have a dual pass griffin stood up vertical. don’t think there is another pusher fan on the market that pushes 2200 cfm+ that Derale claims.
But if that one actually DOES push 2500cfm, your probably fine. One way to find out Though!
Just call me, "Guinea Pig", lol...
It's got to be better than the 112 cfm, combined, that these Amazon Chyna Fans put out.
Pushers just don't move the air that pullers do. Use the fan's amp rating as a reference to how many cfm it'll move. 10 amps = 1000 cfm. Learned this the hard way trying to cool a roots blown car with a small radiator. The fan motor is actually within the gilmer belt. Good luck!
Pushers just don't move the air that pullers do. Use the fan's amp rating as a reference to how many cfm it'll move. 10 amps = 1000 cfm. Learned this the hard way trying to cool a roots blown car with a small radiator. The fan motor is actually within the gilmer belt. Good luck!
Thanks! Unfortunately, with the front mount turbo, I know now that the pushers simply aren't nearly as efficient for cooling.
I am 99% sure I'm going to do a stand up radiator and puller fan(s) over the winter. Time will tell.
I ran that setup on my 2.0 Talon as a pusher. Was more than enough fan for that setup using the factory radiator. Thats with the AC stuff and a large front mount as well. If it's the straight blade version I had, its a LOUD ****! Hope it works out for you! And FWIW I previously ran 2 no name ebay 12s (may have been 10's?) I don't remember. But they couldn't keep up.
I ran a pusher a long time ago, what I learned was you need a powerful fan motor-I switched to a Spal (spelling) and it made a diff, something about the pressure, overcoming the air flyback, etc, and the fan has to overcome all that-the guy sounded like a NASA engineer explaining it to me, lol.
Switched the fan out Friday afternoon.
DEFINITELY moves a lot more air than the 2 smaller ones.
DEFINITELY makes more noise, although I never really heard it yesterday over the engine...not enough to be annoying anyway.
Yesterday was either 93* or 97* depending on who you listened to. All I know was it was brutal hot, hard to breathe, couldnt drink enough water, and...DEFINITELY NOT BOOST WEATHER, lol.
Regardless, an 8 mile drive home, little boost stuff, the ECT stayed in the 190's
Saw 201 at an extended idle
and saw as high as 216 after 2 back to back burnouts on the way back to put it back in the garage.
Temps came right back down to normal, for the ambient temps, after a short normal drive.
As a side note, the 200 amp locally built alternator is working well...
I figured yesterday's miserable hot weather was a good test for both the fan, and the alternator/fuel pumps...seems to be a success with both...finally.
How big is your core? Can you throw another 10-12" fan on there with the 16? I had some good luck with the new flexalite "wave" fans. Their 16" claims 2400 cfm as well. I feel jipped because the new blade design is the only change. You still get the wimpy motors. Things barely pull 8amps each once they get going. lol. Still claims 1325 per 12". Wish they'd put a ballsy motor on there. I still hit 200 sitting in traffic yesterday, but heat index was 105* here. It comes down to 185 where I have them set within 5 mins of cruising at 45.
Wishing I went with a 14 and a 12. Sell ya a 12" at a discount?
But you can see there, where in terms of airflow through the core, the fans are missing a huge amount.
A big single will often have more surface area than 2 smaller fans. I've a 16" single puller on mine, but a smaller 6-7" motorbike fan beside it as it was all I had room for.
Although more recently I stuck a 15" fan on the back of my IC to shift some more air. Although probably should have opted for 14" as the 15" is a bit of a stretch to make fit, but it was about £20 cheaper than the 14" lol.
Havent driven it or used it though as repairing lots of rust at the minute.
How big is your core? Can you throw another 10-12" fan on there with the 16?
It is 18" X 24.5"
I keep meaning to make a top "shroud", but just haven't done it yet. I'm sure that would help a little as well, so the incoming ambient air actually gets directed to the radiator, instead of all over the place. All my other factory plastic shields are in place
Originally Posted by stevieturbo
But you can see there, where in terms of airflow through the core, the fans are missing a huge amount.
A big single will often have more surface area than 2 smaller fans. I've a 16" single puller on mine, but a smaller 6-7" motorbike fan beside it as it was all I had room for.
Although more recently I stuck a 15" fan on the back of my IC to shift some more air. Although probably should have opted for 14" as the 15" is a bit of a stretch to make fit, but it was about £20 cheaper than the 14" lol.
Havent driven it or used it though as repairing lots of rust at the minute.
That was my thoughts as well.
As shown in the pics, my 16" fan still leaves a lot of open core, but seems to be doing good enough on a miserably hot day, so "should" be good on normal warm weather.
Id think a dual pass griffin like the one i run would be a better fit? its a 14x24. Not that i'm that impressed with Griffin radiators. The Howe cores seem to work the best in my experience. Seems like yours it really tall either way!
You could move it down and forward and get fans on the back side...?
If you move that 16" fan to one side I'd bet you could squeak another 10" fan in there at least. Maybe use one of your old cheap fans u pulled off? See if it gives you that little extra push!
I have a 14x14 radiator core on my LS "Race car". With a good Taurus OEM fan and shroud. It cools easily to 190's on a 100* day. In the pits between races I can get it down to 160* in less than a minute with the fan and electric water pump running. Cools better than the larger radiator with dual fans pictured in my mustang anyway.
Last edited by Forcefed86; 07-21-2020 at 01:20 PM.
I'm not going to do anymore mods to it until this abbreviated race season is over with.
The radiator is actually a stock unit, 2 years old, and that's pretty close to the angle it sits, when stock.
100% cannot use any sort of puller fan or fans, now, with the radiator at this angle, and the turbo right there.
I plan to do a vertical radiator swap/conversion over the off season.
Similar to this: https://ls1tech.com/forums/appearanc...r-project.html
That way I can either re-install the (puller) stock dual fans, or some sort of shrouded puller, onto a nicer, more capable Griffin radiator.
I'm sure it doesn't help that I run straight distilled water either. No additives whatsoever.
07-15-2020, 09:42 AM
Anyone use a SINGLE PUSHER fan, instead of dual? 
