Wiring pusher fan for turbo setup
I used this kit and the plastic connectors that plug into the relays actually melted.
Didn't blow a fuse or start a fire, just noticed my temps were a little hotter than normal and my second fan wasn't kicking on.
Just did the three relay setup mentioned below, hopefully it works better.
Didn't blow a fuse or start a fire, just noticed my temps were a little hotter than normal and my second fan wasn't kicking on.
Just did the three relay setup mentioned below, hopefully it works better.
I suspect my ground could've been better and ground size better.
I used the factory fan wires to trigger the coils for the relay then ran dedicated power and grounds for the fans.
Is this how you guys did it?
Did you source fan power from the stud next to the fuse boxes?
Yep that's how we did it, I just can't recall if we sourced power to the fuse block or straight from the battery off the top of my head.
Just some info for anyone who's curious, I wired my fans up exactly this and I was a little confused by the description as to how they would operate.
By wiring them this way, both fans come on together and run at a reduced speed (low speed), when the temp increases they both kick up to high speed.
You can definitely hear the difference, I assumed this kept the fans operating separately but it does not, not that I think it matters, just FYI.
My other hope is that this arrangement spreads the amp load out since I experiencing melting relay connectors with a two relay system.
I used 10 ga wire for the fan power and grounds, nice clean chassis grounds and pulled power from the post next to the fuse boxes.
I'm contemplating pulling power direct from the battery though, any input on where to source power?
By wiring them this way, both fans come on together and run at a reduced speed (low speed), when the temp increases they both kick up to high speed.
You can definitely hear the difference, I assumed this kept the fans operating separately but it does not, not that I think it matters, just FYI.
My other hope is that this arrangement spreads the amp load out since I experiencing melting relay connectors with a two relay system.
I used 10 ga wire for the fan power and grounds, nice clean chassis grounds and pulled power from the post next to the fuse boxes.
I'm contemplating pulling power direct from the battery though, any input on where to source power?
The nice thing about this setup is you don’t have to listen to the fans on high speed all the time.
instead of one fan turning on full speed making all kinds of noise, you get both on at low speed.
I like it. Best you can do without using a PWM fan setup
I'd still like to know where everyone is sourcing the power for the fans, at the battery or the terminal I described above?
I re-did my ChinaZon 12" dual fan's wiring, Friday before loading car up for Saturday's bracket race.
I used the small DARK BLUE and DARK GREEN ECM Ground Trigger wires off of the factory triple relay setup (off of Fan #1 & #2), to turn on the new dual relay/full power setup.
40 amp Relay terminals 86 and 30 connected directly to 12 volt + post at underhood factory relay/fuse center.
Terminal 87 to fan + POSITIVE
Terminal 85 to - Dark Blue (and separately, to Dark Green Ground Trigger wires)
FAN #1 comes on (full power/speed) at 185 and literally blows through the radiator, and directly onto the turbo
FAN #2 comes on at 190, also at full power/speed, and the highest ECT registered at the end of a boosted pass, was 199*
Just driving around, it stays at 191 or so.
FWIW, with road noise causing heim joint connections at all suspension points, slightly whiney spooled 9" rear, and leaky exhaust cutout, my fans aren't anywhere near loud enough to be annoying, lol.
Having them plugged directly into the factory fan plugs, the car would see as high as 220* after a pass, and that was on a cooler day. They also never kicked onto their HIGH speed wired up like that.
My IAT's are also down slightly, which is a bonus.
I used the small DARK BLUE and DARK GREEN ECM Ground Trigger wires off of the factory triple relay setup (off of Fan #1 & #2), to turn on the new dual relay/full power setup.
40 amp Relay terminals 86 and 30 connected directly to 12 volt + post at underhood factory relay/fuse center.
Terminal 87 to fan + POSITIVE
Terminal 85 to - Dark Blue (and separately, to Dark Green Ground Trigger wires)
FAN #1 comes on (full power/speed) at 185 and literally blows through the radiator, and directly onto the turbo
FAN #2 comes on at 190, also at full power/speed, and the highest ECT registered at the end of a boosted pass, was 199*
Just driving around, it stays at 191 or so.
FWIW, with road noise causing heim joint connections at all suspension points, slightly whiney spooled 9" rear, and leaky exhaust cutout, my fans aren't anywhere near loud enough to be annoying, lol.
Having them plugged directly into the factory fan plugs, the car would see as high as 220* after a pass, and that was on a cooler day. They also never kicked onto their HIGH speed wired up like that.
My IAT's are also down slightly, which is a bonus.
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Did some more driving on my car the other day. These Derale Fans stay on low speed 99% of the time. At a REALLY long stop light (Like a train) it will hit 200 and the high speed will flip on for just a second before the temp plummets quick. Stay nice and cool moving down the road as well.
No air damn or anything
Pretty excited cuz my last turbo fbody fought me to stay cool.
No air damn or anything
Pretty excited cuz my last turbo fbody fought me to stay cool.
The roller never had it when I bought it. The entire core support is chopped out and the radiator hangs between the frame rails.
Car was intended to be 90% track.. 10% street. Pretty Gutted. the radio, speakers, HVAC, power steering/brakes, windshield wipers, etc etc all gone. Kirky seat. All heim suspension. Dbl adjustable shocks. It’s not exactly a enjoyable car to just drive around anyways 😂 but maybe I’m just getting old (I’m 32 lol)
Car was intended to be 90% track.. 10% street. Pretty Gutted. the radio, speakers, HVAC, power steering/brakes, windshield wipers, etc etc all gone. Kirky seat. All heim suspension. Dbl adjustable shocks. It’s not exactly a enjoyable car to just drive around anyways 😂 but maybe I’m just getting old (I’m 32 lol)
Yeah with the factory setup. I have a Holley terminator on the car and it controls the fan relays based on only coolant temps. So far so good.
TECH Fanatic
Joined: Dec 2017
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Likes: 1,086
That's exactly my point. The fan turnoff speed is a single cell in a table in the stock ECU. So what is Holley doing that a stock ECU cant in this situation?
TECH Fanatic
Joined: Dec 2017
Posts: 1,611
Likes: 1,086
Nothing. He didn't say it's doing anything extra. Only that the Holley doesn't turn the fan off over a certain speed, only by coolant temp.