The relay has 10 -12 gauge wire I just swapped out the 30A to 40A breaker. I've got an optima red top and hd alternator 136 amp so I should be good there. If not I was thinking about running +12volt from the battery to a toggle to a fan with a 30A breaker in line for each fan. opinions welcomed

 

My "9 amps when running" fans take about 13 amps on startup when really cold. I originally had a 25A fuse inline, blew that once in a great while. Been using a 30A fuse ever since, no problems.

 

Switch to 40A breaker last night and turned the fans on they even sound like they suck more air. Need to test drive them today.

 

could be that they actually are..

direct current devices can be over-driven.. halogen light bulbs manufactured for 6v can be pressed to 9v, and produce a much brighter light- IF- they can survive start-up (they usually blow with that much difference of v's).. I overdrive 5.4v lights to 6v~7.4 v all the time.. it is the difference between 200 lumens and 330 lumens from the same bulb...

the same principle holds with d/c motors too.. more juice means more gogo.. the problem with doing so is that they weren't designed to do it- and juice translates to heat real quick like when it has no other means to exhaust itself.. so the WIRE and coil won't support the juice.. you can get by with slight increases though.. like, say, from 12v to 14v.. and your fan speed will increase significantly with each additional v until it burns up..

this is a good thing that it works this way, because your lead acid battery doesn't maintain constant output.. it may be 14v's when fully charged, but drop to 11v's nearing the bottom of it's cycle.. It's the same thing with your starter motor as it is with your efans.. Notice how the starter turns slower at the bottom of a charge cycle? Notice how, at some point, there isn't enough juice to provide the kick to start it? But even then, in hard start situations, once the first couple of starter revs are accomplished- the starter usually spins normal- until it's source is wasted..

anyway: you wired directly to the battery.. you will be using whatever charge the battery provides.. even if your alternator is producing 136a, the pull is directly off your battery.. you're going to want as much juice going into that battery from the alternator as you're pulling from it with the fans + whatever other accessories your pulling directly off the battery with.. you'll notice a loss of charge if you are pushing efans +, say, off road lights.. or amp for your stereo, or compressor, or other such accessory wired directly off battery.. you'll want to watch that in those situations.. you don't want a slowly depleted battery that leaves you stranded..

with the ballsier alternator, I doubt you'll have an issue, but again- it is dependent on what you have going on downstream of the battery more so than upstream whether or whether not you create a slow drain situation.


edited to add: you can overdrive devices to get more performance, but you are cutting drastically into the expected life of those items when you do.. light bulbs, for instance: using the 5.4v bulbs I do results in a helluva lot more light- but I stand about a 40/60 chance they will blow every time I turn them on.. this isn't a big deal because they aren't expensive at all.. an efan being over driven? I wouldn't risk it.. a matter of fact, if I ever have issue with the controller I'm currently using, I'm going to wire one with an inline regulator and capacitor... OR, I'll wire one with a potentiometer, and use the ability to overdrive to my advantage in a situation like towing up grades in extreme heat.. OR, I'll do both- a split, with regulated power on one side and a potentiometer on the other and a switch at the break(s)... it's not hard to do this, and it would be pretty beneficial in the right situation.

 

My entire electrical system has been upgraded. HD alternator, optima, 1/0 power and ground cables. I do have 2 kicker amps running and a factory infinity amp, e-fans, and sometimes a massaging seat cushon, I have a bad back (got hurt on the job). I splurged about 26 bucks for "high quality" stinger battery terminals junk is all I have to say.