Overvolting Panaflo?

[Mr.Radar]

The Panaflo (12v's) are suppost to work up to 13.8 volts. The 80mm H1A is only rated for 40cfm and I want MORE. The Panaflo U1A is very hard to find and is pretty expensive. I was wondering if I could overvolt an H1A to get higher CFM's and if so how would I do it?

 

[sandman001]

Well, you would need to connect the 12V wire liek normal, but then put a -wire to the normal ground wire of the fan.

But, the loweste voltage you can do that on a Pc is -5V, which would give you 17V, which would kill the fan, and possible the power supply depending on the -5V amperage it's capable of.

 

[Mr.Radar]

What if you lowered the +12 down to +8 with a rheostat or a resistor.

 

[sandman001]

then, it technically should work, but I've never seen anything like it done. Also, what -5V rating does your PS have?

 

[Mr.Radar]

0.3 Amps, but it's a Fortron so it could probably do 0.5 (<< random guess).

 

[Mr.Radar]

If the Panaflo uses .17 amps & 12v @ "stock" then it should use 71 ohms right? So to get 8 or less volts on the 12v line I would need a 25 (or greater) Ohm resistor right?

 

[sandman001]

Well, it's around 23ohm actually.

Just jokin man, that sounds about right to me. And it would only need .17Amps off the -5V line too......I think.