i have discovered that with a combined load current of 77 amps at 13.8 volts, my stock Toyota Tacoma 65 amp alternator does not have enough output to run all three air compressors simultaneously. I will need to look into and alternator with a higher output current and possibly a second battery plus a battery isolator.
When the 3 compressors are running, it starts out running fast and smooth, but as my battery slowly drains and my voltage drops to a dangerous 10.5 volts, the compressors begin to run slower and slower, and are on the verge of stalling. If the compressors stall, that means they will burn up. I am not sure if they have a low voltage protection or not.
Wrangler northwest power products makes alternators for ambulances and limo’s and seem to be very good. They said they can hand make me one with a predicted max output of 175 amps and an idle current of 100 amps for $800 .
I just thought all you “techy’s” would find this interesting.
I went through DC power for a 2nd alternator setup. They are a good company and have reasonable prices. I don’t think I spent that much for the whole kit. 230amp + brackets, etc…
I’ll throw the BS flag on that one. Someone is trying to rape your wallet bro.
The cost of a new high output alternator shouldn’t be more than $200. Swing by PepBoys, AutoZone, etc., and ask how much one costs. With the right tools you should be able to install one in under an hour.
A second battery next to the compressors is a good idea. My diesel rig already has two with a 165 amp alternator and I’m considering a third battery (possibly deep cycle) with 2/0 welding cable to connect it to the other two so I don’t put as much strain on the stock batteries, or I might just switch them out to industrial sized batteries.
I just got a 280 amp dc power alt. to replace my 145 amp in my silverado… I’ve yet to install but hear great things about them . And It right around $400.
FYI - you’re not likely to find a high output, custom wound alternator at PepBoys for a Tacoma. This will be a speciality-built unit with a higher price tag.
I cant wait to install mine but i want to change my idler pulleys for ac and acc belts , plus the belts since i have this damn squeel/ whistle noise. Just have to wait out the weather!