Alternator

[N1YDP]

1 have a 1980 c20 with a electric 8' plow,flashing 55 watt wigwag and rotory beacon.i have dual batteries with isolator.it seems the alternator i have cant keep up with everything running,heater,lights,wipers.
how big of an alternator should i go?80,105,140

 

[Graystone]

1 have a 1980 c20 with a electric 8' plow,flashing 55 watt wigwag and rotory beacon.i have dual batteries with isolator.it seems the alternator i have cant keep up with everything running,heater,lights,wipers.
how big of an alternator should i go?80,105,140

If you have the option go as big as you can.

 

[89Suburban]

Here is some info on the 140 amp upgrade. I am running the 105 amp model and am very happy with it but I do not have the voltage loads you are running.

http://www.gmsquarebody.com/forum/showthread.php?t=2670&highlight=alternator

 

[ice205]

anything over 200 amps would get hot and quite working so id stay at atleast 200 amps and u would be fine ..remember the battery is just for starting and storage for power if it needs ..

 

[Driver4r]

I was looking at 150-200 for mine. Ill probly go like a 250, cause ill have 7 150watt KC's pulling ALOT of power, on top of that ill have stereo Pulling around 5k watts and other misc acceseries. But for a everyday DD (or in this case a plow truck). I would stick with like 100-140.

Also im gonna go with dual 1050's, atm i have a single 1050.

 

[jux]

I agree, I think 140 would be ideal. No more than 180. If you can find anything in that range I would go for it.

 

[89Suburban]

I was looking at 150-200 for mine. Ill probly go like a 250, cause ill have 7 150watt KC's pulling ALOT of power, on top of that ill have stereo Pulling around 5k watts and other misc acceseries. But for a everyday DD (or in this case a plow truck). I would stick with like 100-140.

Also im gonna go with dual 1050's, atm i have a single 1050.

You are so hard core hoss