Low speed E-fan
#1
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#3
SPAL fans are a single speed fan, but work with SPAL (if you can find one) or Flex-a-lite variable speed controllers... these ramp up the speed of both fans (wired together) to a low setting of ~60%, and then increase the speed if adequate cooling is not achieved... A/C override brings them on at 60%.
Derale has a dual fan controller... it starts with fan#1 at 100%, and kicks in fan#2 if fan#1 isn't doing the job... A/C override kicks in fan#1.
My guess on fan activity in the cold, is the A/C cutting in to control cabin humidity... remember, water is always flowing through the heater core, and the blend door mixes the hot and cold to the selected temp.
Derale has a dual fan controller... it starts with fan#1 at 100%, and kicks in fan#2 if fan#1 isn't doing the job... A/C override kicks in fan#1.
My guess on fan activity in the cold, is the A/C cutting in to control cabin humidity... remember, water is always flowing through the heater core, and the blend door mixes the hot and cold to the selected temp.
#4
I have the derale controller. and yes the fans are kicking on due to ac override when the compressor kicks on for the defroster.
I was hoping to not have to replace the controller as I am actually really happy with it, there is also the cost of a new one. I've had it idle at 95* outside and never had more than fan #1 kick in. Its such a huge energy draw at idle though, the electrical system just can't keep up. Especially in winter.
a variable speed controller shouldn't harm the single speed fans should it?
I was hoping to not have to replace the controller as I am actually really happy with it, there is also the cost of a new one. I've had it idle at 95* outside and never had more than fan #1 kick in. Its such a huge energy draw at idle though, the electrical system just can't keep up. Especially in winter.
a variable speed controller shouldn't harm the single speed fans should it?
#5
Don't know.
The other alternative would be to upgrade the alternator. Might be cheaper... certainly be easier. Its a direct bolt on. Consult your build sheet, and see what amp output alt came stock. Take it from there. I have seen 220 amp alts for our trucks. (granted, they were expensive.....)
The other alternative would be to upgrade the alternator. Might be cheaper... certainly be easier. Its a direct bolt on. Consult your build sheet, and see what amp output alt came stock. Take it from there. I have seen 220 amp alts for our trucks. (granted, they were expensive.....)
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#7
Craigslist, EBay, Discount codes, Neighbors.
Yeah, basically, it boils down to one word. "Luck".
Also, I have a bit of an advantage. I have been 'in the business' for a couple decades, and have pretty much used the same suppliers the whole time, so, they know me on a first name basis, and I get some pretty good discounts on parts.
Yeah, basically, it boils down to one word. "Luck".
Also, I have a bit of an advantage. I have been 'in the business' for a couple decades, and have pretty much used the same suppliers the whole time, so, they know me on a first name basis, and I get some pretty good discounts on parts.