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Post Info TOPIC: High output alternator


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High output alternator


Would like input, which alt to get. Have 10si 61 amp. going to add AC and electric fan ( 16" two speed) need about 90amps at idle. leaning toward CS!44 easy to repair if needed and has good bearing on back end.  Thanks  Laurie



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Guru

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Have you considered Classic Auto Air for your AC.

I had my 67 Impala converted over to AC this spring along with a Champion Aluminum radiator. Quite satisfied with it. A single wire alternator from Performance Improvement rated at 100 amp.. Chrome to boot.

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Cliff



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Police/Taxi alt were high output..125 amps I think. Just can't remember part#. They were bigger..do you have room?

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Canadian Poncho Superstar!

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I have a 61 or 63 amp one for a 70 Chevelle 454 w a/c if it peaks your interest. I won't be able to get to it until early next week, but let me know if you want me to dig it out and take some photos.

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Had car running, lights all lights on even high beam,heater on, hooked up the electric fan on low speed not to bad but on high OH my ran engine too 2200 rpm just started to get the volts up to 13.2 couldn't do any better! Electric may just need a new home keep the mechanical one. Been looking on internet sure can get some big alternators 3-500 amps. May look at GM CS144 does 140 amps overdrive it and idle amps may not be to bad. thanks for replys. Laurie

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Canadian Poncho Superstar!

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Fore sure loose the 10si. I think Power Master makes a nice 3 wire 100 amp 12si alternator. Maybe even higher output than 100 is available in the 12si. CS is far better at idle for sure, but the 12 is an improvement on the 10.

Regardless, imop, outside the alt, the biggest improvement you can make is to build a complete new charging harness. Ditch ALL that old frail wire. Create a main power point up front, and tap off of that. Let the alternator sense load off that power point. And do relays where possible on any significant load. It's easy to integrate and hide it all into your stock loom. Buy a 3/4 " roll of harness tape. Cheers. 



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Going with a CS144 200 Amp alt. As a result firewall forward will be rewired, will need a # 2-4 cable alt to Batt. then feed rest of car from that. Amp gauge is going (putting a temp gauge in there) and so they match fuel gauge goes in favour of matching one matching temp an indicator light some where. Right now headlights and ignition are relays ,daytime running light relay as well. This winter seems to be one of wiring, have Pontiac to do then my !948 Ford it gets new gauges aand charge system redo. Laurie

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Canadian Poncho Superstar!

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Your doing it right Laurie! Improve performance and make it more durable.



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67' Grande Parisienne. Ex Ottawa USSR Embassy car, 67- 68.
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Canadian Poncho Superstar!

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What are you guys talking about with 10si & 12si? Also, I can't see why you'd need 150 amps.

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72 GMC Sierra

 

 



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10si-12si are generations of Delco internal regulated alternators. 10si being first 12si an updated one with better cooling so could make more amps. The cs144 I'm going to use is rated at 200 amps this s so it will produce 115 amps at idle speed, need this for eletric cooling fan if I use one it draws about 40 amps. When the lights are on, heater on Hi and if eletric fan comes on when stopped at lights the 61 amp 10si can't keep up, barly keeps up with just headlights on. The cs144 is found on Buicks and Cadillac in late 90's. Hope this helps Laurie

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Canadian Poncho Superstar!

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Correct me if I'm wrong, but do most all internally regulated alternator not only produce what is needed according to the demand? Then goes up to the rated max output.

So in that even the biggest alternators can behave like the smallest at no load.

I think the CS is a very good choice, my 85amp 12si will drop off at anything below 700 rpm, but it certainly beats the old original 10si external.

 



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67' Grande Parisienne. Ex Ottawa USSR Embassy car, 67- 68.
6977017306_dfca361bfc_m.jpg
 


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Right they all will only produce what is needed, that 200amp one I'am getting will make the 200amps at hi speed, but at idle it is capable of 115 amps approx. at engine idle that is because of different windings etc. Have to watch the CS alts that have the small sealed ball bearing in the rear bearing is to small and will not last with tight belts especially auto belt adjusters. Laurie

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