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still considering my plan of attack...
Quote:
Originally Posted by X5chemist
A) Spal makes brushless fans. Can it start the fan at full voltage and ramp it down?
B) The TOPAZ 64546921381 is a good fan. I've been running one for three years. Since it's brushless, it takes almost 31 seconds to stop spinning from top speed. Works so good my A/C can reach 42F.
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A) As far as I can tell, the SPAL brushless fans (comparable in size and CFM ratings) cost 3-5x what my Flexalite fan did; too much. The $22 fan speed controller came with zero instructions, so I don't know if it will start at low or high speeds, so I'm betting it will work either starting at a low setting or on the "stop/off/neutral?" setting when first switched-on (ignition on), then flipping the rocker switch to "forward" on low. I'll still have to determine what the single-bar and double-bar markings on the switch mean. I hoping the Flexalite fan motor will tolerate rotating backwards, if I have to experiment to find the correct way to toggle the rocker switch.
B) I was looking at the Topaz fan long ago, actually thinking about using it like I outlined above, but chose to go conventional with a fan by a brand I'd used before (Flexalite). Mine works so good, my A/C can reach 38F. haha
Quote:
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Originally Posted by wpoll
Just FYI, I doubt you can run two aux fans on the OE aux fan circuitry (in the DME). The DME monitors the fan and also use PWM to control it, so having two fans attached could possibly cause a DME error (which would shut the fan(s) down).
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That was a concern I had, when I thought about using a second "auxiliary" PWM fan (see above), so I went conventional. Not knowing what sort of sensing is going on in the PWM fan-DME circuitry, I wasn't quite ready to experiment, 2.5 years ago. I would've just used the trigger wire run to both fans, with separate power and grounds for each.
I once doubled/sisterred fuel pump relays on my S-10, 25 years back, after I had the single relay fail twice, at night, out of town, at the worst times. I used the same set-up as I would've with the two aux fans, and it worked...but I've no idea if there was a PWM circuit involved. I was very experimentally-minded, back in the day.
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01 BMW X5 E53,3.0i-5L40E, 7/13/01
topas-blau,Leder-grau,"resto-project car"
Here:
14 Lexus ES350,3.5L-U660E
09 HHR Panel,2.2L-4T45E
04 Chevy 2500HD,6.0L-4L80E
98 GMC Sierra 1500,5.7L-4L60E
Gone:
66 Chevelle Malibu 2dr ht.,327>441c.i.-TH350>PGlide/transbrake
08 Cobalt Coupe,2.2L-4T45E
69 & 75 C10s,350c.i.-TH350
86 S10,2.8L-700R4
73 Volvo 142,2.0L-MT4
72 & 73 VW SuperBeetles,1.6l-MT4
64 VW,1.2l-MT4
67 Dodge Monaco 500 2dr ht.,383c.i.-A727
56 Chevy 210 4dr,265c.i.-PGlide
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