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Has anyone had any problems with their alternators from driving the compressors and everything else too? I want to do 2 compressors to one tank so it won't take so long to fill, but I don't want it draining too much and causing any problems. Anyone know if it will hurt anything??

 
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the most widely used compressor, Viar 450 - 100% duty cycle is rated at 20 amps. I use one with a 20 amp fuse and have never blown the fuse. I also use it with my 4 channel high's amp which draws around i dunno....30 amps...it would be the same as running a high power stereo system. But if you got that too and 2 comps its gonna be hard !

 
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I have a custom system running a 800 watt amp and 300 watt amp, and 2 compressors for my bags and I have yet to of had a problem. However I never usually hit my bags unless I'm parking (lower) or going somewhere (raise). I usually have the radio up a bit when they are working but no problems with my alt. not yet at lease (knock on wood). I would say you should be o.k. It may become a problem if your bags begin to leak and your compressors are going off constantly. Then you might want to check your valves but other then that you should be o.k.

 
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You should be alright.

 
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Alright thanx, if I start to worry about it I'll just try to cut the amp off whenever the compressors are on for very long. Its not but a 425 watt amp anyway so it shouldn't be that bad.