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Originally Posted by jtgh
[*]Electric conversion losses are the worst. (double conversion)
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I'm not sure about that, ever notice how many cooling fins are on a belt drive fan clutch? Even with all of those fins and high airflow it still gets pretty darn hot. I'm not sure about this one, but if I had to guess it would be similar. Now if you could do an on/ off clutch we'd have a solution.
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Originally Posted by jtgh
[*]noise
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Depends on the fan both ways. I've had belt driven fans that were stupid loud, and I've seen electric fans that were stupid loud.
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Originally Posted by jtgh
[*]heat.
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Not sure what you are talking about here.
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Originally Posted by jtgh
[*]cost
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Cost is going to depend on the application, but since most cars have E-Fans to begin with, I'd say that the E-fan would win. and if you were designing a system from scratch then E-fan would almost certainly win.
[*]reliability (complexity is almost never the best solution )
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Originally Posted by jtgh
the flex fan uses little energy ,
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The flex fan is a pig at low RPM's and drains *less* horspower at high RPM's in an attempt to equalualize airflow/ horsepower loss. If your application needs constant airflow then it is a great option, if you drive your car either in stop and go traffic, have short trips (always on waste the most energy at start up) or on the interstate (high airflow regardless) it isn't such a good option.
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Originally Posted by jtgh
your choice will always be personal. Floating your own boat....?
I just want to give choices.
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Agreed, just use good Data
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Originally Posted by jtgh
many ppl have bad clutches and don't even know it.
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If they can run their fan slowly/ not at all then they have no reason to have an always on fan. They should either stick with the broken clutch, or run an E-fan with thermostat.
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Originally Posted by jtgh
or dont know how to test it , or have wrong assumptions of how it really works. ( it just slips most the time)
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If their car doesn't run hot in their application, then it is of no concern to them.
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Originally Posted by jtgh
Best post , for me?
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What?
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Originally Posted by jtgh
saving motor with broken fan belt. fan made pump spin just enough to save the motor. Chock one up ,for a real fan.
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One could argue that several ways.
1) If you had reduced the harmonics of the fan you wouldn't have thrown the belt.
2) You should have watched the belt more closely.
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Originally Posted by jtgh
never happened to me i do real PM's on cars. (since 65) Gatorbelts ! Rule.
retired yesterday .
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What are PM's on cars?
I've run GoodYear Gatobacks before, and they do work very well, particularly with superchargers.