Variable Speed PWM Fan Control under $25 or less DIY
#81
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Andrew
#82
#83
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Thread Starter
They are quick enough to run with an external fuel pressure regulator.
I think they are better as fan controllers than as fuel pump controllers. I'm still using them for both, but I do have a shunt relay for the primary fuel pump that is turned on for a few seconds when the car is starting or when the boost is over "x" psi.
#84
Not quick enough for closed loop fuel pressure control.
They are quick enough to run with an external fuel pressure regulator.
I think they are better as fan controllers than as fuel pump controllers. I'm still using them for both, but I do have a shunt relay for the primary fuel pump that is turned on for a few seconds when the car is starting or when the boost is over "x" psi.
They are quick enough to run with an external fuel pressure regulator.
I think they are better as fan controllers than as fuel pump controllers. I'm still using them for both, but I do have a shunt relay for the primary fuel pump that is turned on for a few seconds when the car is starting or when the boost is over "x" psi.
1st pump pwm based on RPM
second pump pwm "comes on" after x psi and increases with boost
Just wanted to make sure they would pick up speed fast enough to satisfy demand.
What do you think??
Oh yea what is the minimum duty cycle you would recommend
thanks
#85
TECH Fanatic
Thread Starter
this is what i was considering:
1st pump pwm based on RPM
second pump pwm "comes on" after x psi and increases with boost
Just wanted to make sure they would pick up speed fast enough to satisfy demand.
What do you think??
Oh yea what is the minimum duty cycle you would recommend
thanks
1st pump pwm based on RPM
second pump pwm "comes on" after x psi and increases with boost
Just wanted to make sure they would pick up speed fast enough to satisfy demand.
What do you think??
Oh yea what is the minimum duty cycle you would recommend
thanks
At 240, the shunt relay is activated. I'm trying to get maximum out of my fuel pump under high boost.
#87
If I wanted to use the Mitsu PWM controller on a Holley Dominator setup for a LS1 fan setup (dual), could I trigger the fans to ramp up when the A/C kicks on?
I feel like this could be accomplished within the Holley software utilizing a second input for the A/C and then programming the PWM to ramp up at a certain % when the A/C is activated?
I feel like this could be accomplished within the Holley software utilizing a second input for the A/C and then programming the PWM to ramp up at a certain % when the A/C is activated?
#88
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If I wanted to use the Mitsu PWM controller on a Holley Dominator setup for a LS1 fan setup (dual), could I trigger the fans to ramp up when the A/C kicks on?
I feel like this could be accomplished within the Holley software utilizing a second input for the A/C and then programming the PWM to ramp up at a certain % when the A/C is activated?
I feel like this could be accomplished within the Holley software utilizing a second input for the A/C and then programming the PWM to ramp up at a certain % when the A/C is activated?
In the PWM output configuration assign the A/C input that you just created to the X-axis. Assign CTS to the Y axis. So you will then have is a PWM table that is essentially split in two. The part of the table that has zero for the A/C input is your A/C off condition. The part of the table that has 1 for the A/C input is for when the A/C is turned on. Now you can input duty cycle numbers into the A/C on portion of the table, regardless of CTS. Additionally, if you have a VSS signal going to the Dominator, you can disable all fan activity above a certain speed, so the fans aren't on when you're driving down the highway.
Andrew
#89
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I'm researching an e-fan swap in a V8 Rainier (Trailblazer). I've read through this great thread and have a couple of questions-
1. Will the Mazda/Mitsu units control something as power hungry as the Mark 8 fan (80+ amps inrush, 40+ on high). I saw the reference to the 450 fuel pump and looked up the stats for it. At 80 PSI it's only pulling around 17 amps.
2. The main issue I have with the C6 module s the unobtanium connector. I saw a reference to a Spal connector at Summit for $25, but when I visited their site today I didn't see anything like that. Is there a part number?
I'm currently looking at running a dual fan setup from a 2017+ Ford Escape 2.0 turbo with tow package since it matches my radiator core nearly perfectly and it has vents for bypass airflow. I'm sure it does not pull amps like the Mark 8, but I think it also uses some type of PWM controller. My truck is well-suited to this since it is a 2005 and the same E40 controller as the C6 Vette. It can easily output a PWM signal on the same pin it uses for the OEM clutch fan. All I have to do is mod the fan settings in HP Tuners.
Thanks again for the thread.
1. Will the Mazda/Mitsu units control something as power hungry as the Mark 8 fan (80+ amps inrush, 40+ on high). I saw the reference to the 450 fuel pump and looked up the stats for it. At 80 PSI it's only pulling around 17 amps.
2. The main issue I have with the C6 module s the unobtanium connector. I saw a reference to a Spal connector at Summit for $25, but when I visited their site today I didn't see anything like that. Is there a part number?
I'm currently looking at running a dual fan setup from a 2017+ Ford Escape 2.0 turbo with tow package since it matches my radiator core nearly perfectly and it has vents for bypass airflow. I'm sure it does not pull amps like the Mark 8, but I think it also uses some type of PWM controller. My truck is well-suited to this since it is a 2005 and the same E40 controller as the C6 Vette. It can easily output a PWM signal on the same pin it uses for the OEM clutch fan. All I have to do is mod the fan settings in HP Tuners.
Thanks again for the thread.
#90
TECH Senior Member
iTrader: (7)
The 2008ish Ford Fusion uses the same controller as the C6. Go to the junk yard and grab it, with the connector and the round Yazaki mating connector (grab both ends). If you want new, Gates sells the controller with the connector and the Yazaki round connector. Spal sells the mating connector and terminals for the other side of the Yazaki connector.
Andrew
Andrew
#91
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Thanks. I don't have a JY nearby. I use car-part.com on occasion, but there's no guarantee you'll get the pigtails if you buy one, plus the new ones are dirt cheap. I found a similar looking Yazaki connector for the Mazda controller, but it uses all the same size pins and had the slot in the wrong place. The unit clearly has 2x large and 1x small on the large connector. I'll try to pour through their connector catalog to see if I can find the proper ones.
Any thoughts on the circa 2013 ATS controller? I see they are under $40 on eBay. Looks like 2x in/out on each end of it. I can't swing almost $200 for the Gates unit.
Any thoughts on the circa 2013 ATS controller? I see they are under $40 on eBay. Looks like 2x in/out on each end of it. I can't swing almost $200 for the Gates unit.
#93
The 2008ish Ford Fusion uses the same controller as the C6. Go to the junk yard and grab it, with the connector and the round Yazaki mating connector (grab both ends). If you want new, Gates sells the controller with the connector and the Yazaki round connector. Spal sells the mating connector and terminals for the other side of the Yazaki connector.
Andrew
Andrew
From what I've found, LS1 fans can draw up to 57amps on start up and then around 13.6 while running together. I would assume that the start up amp draw would be considerably lower if bringing them on at a much lower % through the PWM control.
#94
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Andrew, after using the C6/Fusion controller on my last car with good success, I would like to use it again. However, now I have a LS1 dual fan set up, could the C6/Fusion controller power wire be split to two separate fans and bring them online at varied % just as a single fan would and handle that amperage?
From what I've found, LS1 fans can draw up to 57amps on start up and then around 13.6 while running together. I would assume that the start up amp draw would be considerably lower if bringing them on at a much lower % through the PWM control.
From what I've found, LS1 fans can draw up to 57amps on start up and then around 13.6 while running together. I would assume that the start up amp draw would be considerably lower if bringing them on at a much lower % through the PWM control.
Andrew
#95
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Thanks for the info. I'm going to try semi-old school first. I got a 97 Thunderbird fan @ Rock Auto today for $60 shipped (mfr closeout). It's supposed to be the 17" version of the MK 8. I also found a premade shroud here for about the same price shipped. I like it since it is within an inch each way of my core, and has airflow slots with flaps. It has a 16" cutout, so I can size it as needed for the T-bird fan.
I ordered the Mazda and Dorman PWM controllers on eBay and need to reach out to Yazaki to try & find some new connectors & terminals so I can DIY the wiring with some large automotive-grade wiring. I'll try the Dorman first since it comes with a pigtail.
I've read stories good & bad on the C6 fan on the Trailblazer. I also found a god thread here on a C7 install in a Trailblazerl. I think the C7 fan will be the MK 8 of this generation.
I ordered the Mazda and Dorman PWM controllers on eBay and need to reach out to Yazaki to try & find some new connectors & terminals so I can DIY the wiring with some large automotive-grade wiring. I'll try the Dorman first since it comes with a pigtail.
I've read stories good & bad on the C6 fan on the Trailblazer. I also found a god thread here on a C7 install in a Trailblazerl. I think the C7 fan will be the MK 8 of this generation.
Last edited by V8 Supra Builder; 05-11-2020 at 09:48 PM.
#96
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Good luck finding a US supplier for Yazaki. I actually had Yazaki parts sent to me from Japan for a Prius electronic steering project that I installed in my Cougar. The only connector and terminals that you will find is the round connector sold by Spal. That's because it is a USCAR standard, so it is used on a huge variety of fans, like C7, Ford Fusion, and probably a host of others.
Good luck. Let us know how it all works out. BTW, the Fusion fan, controller, and harness can be had from Rockauto for about $200.
Andrew
Good luck. Let us know how it all works out. BTW, the Fusion fan, controller, and harness can be had from Rockauto for about $200.
Andrew
#97
Fuel Pump control
Fuelab makes a pump/regulator combo that varies pump speed to maintain set pressure. Instead of your pump running full speed and most of the fuel being returned to the tank, the pump is quiet until you need it. It's patented and quite slick...and quite $$$
#98
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Good luck finding a US supplier for Yazaki. I actually had Yazaki parts sent to me from Japan for a Prius electronic steering project that I installed in my Cougar. The only connector and terminals that you will find is the round connector sold by Spal. That's because it is a USCAR standard, so it is used on a huge variety of fans, like C7, Ford Fusion, and probably a host of others.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Good luck. Let us know how it all works out. BTW, the Fusion fan, controller, and harness can be had from Rockauto for about $200.
Andrew
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Good luck. Let us know how it all works out. BTW, the Fusion fan, controller, and harness can be had from Rockauto for about $200.
Andrew
Aliexpress is a Chinese site that at times has worthwhile stuff. I found a 5 pack of those connectors complete with terminals and seals for under $11 shipped: They also do larger quantities.
7283-8497-90
I also googled that number and it comes up as available on Octapart, but the two places are quote only vs direct buy.Here's what appears to be a knockoff for $2.10, minimum order of 1. No terminals or seals though. They also sell those but it looks like the minimum of the 9.5mm ones is 700. There are several links where it can be had for a more reasonable price. There is a site I use for Japanese bike connectors called Corsa Technic. They are very reasonable and I think they carry Yazaki among others.
I saw a video on YT about the Fusion fan and the guy was very impressed with it. He said it would hover. I was set to buy the 2017 Escape 2.0L turbo w/ tow package fan for about $120 shipped. It was real close to my core size. The unknowns with it were airflow, mounting, and wiring connector, so I went with a known fan. I've used the MK 8 or Taurus fan on RX-7, 280Z, BMW, and Supra swaps. I also used it on my Durango when it had the 5.9L Dodge motor. I plan to reuse it with the LM4 I'm building now.
#99
The C6 fan is rated at 400 watts, which is around 32 amps. If it was me, I wouldn't hesitate running both fans off a single C6 controller. There is no reason to run them separately. I would much rather run two fans at 55% than run a single at 100% plus a second at 5%. I have also found that, at least with the Holley EFI, there is no reason to over complicate the PWM programming.
Andrew
Andrew
#100
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I emailed Dorman's tech support and request amp capacity for the 902-303 mentioned in this thread. Here's their reply:
If it will handle that amount continuous then a MK 8 should not be a problem. Not sure who to ask about the Mazda one.
I may pickup up a discounted C6 controller and see how difficult it would be to make my own connector for it.
Originally Posted by Dorman Tech Support
There is not a maximum amperage shown as we went off of the OE design, it does show switching amperage of 10 to 15 required, and based off of what the fan will pull about 20amps each on on high, I would put a max amperage "Estimate" @ 45-50amps
I may pickup up a discounted C6 controller and see how difficult it would be to make my own connector for it.