Re: Looking for a higher powered alternator
[Re: Kern Dog]
#2471576
03/24/18 10:39 PM
03/24/18 10:39 PM
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Joined: Aug 2003
Posts: 43,285 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,285
Bend,OR USA
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Tough Stuff makes a bolt on stock looking replacement 100 Amp alternator that is black powder coated that works real well with no other changes to the wiring or anything else Bolt it on, hook it up and go I bought and used one on my old pump gas street Duster that worked very well, even with two group 27 RV/Marine batteries mounted in the trunk
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Looking for a higher powered alternator
[Re: Kern Dog]
#2471608
03/25/18 12:13 AM
03/25/18 12:13 AM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,444
Indiana
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I have been running this Powermaster unit for the last three years. My headlights are bright and no power issues at idle. They sell them in one or two groove pulleys. It is a one wire and I have done all of the wiring upgrades before the install. I had to tweak the spacers a tad with the aluminum heads, but no big deal.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Looking for a higher powered alternator
[Re: Kern Dog]
#2472257
03/26/18 12:45 PM
03/26/18 12:45 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I pressed the brake pedal and it dropped to around 12 and stayed there. & the RPM was the same as the prior test?
live every 24 hour block of time like it's your last day on earth
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Re: Looking for a higher powered alternator
[Re: RapidRobert]
#2472268
03/26/18 01:20 PM
03/26/18 01:20 PM
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Joined: Feb 2003
Posts: 16,161 Mesa, Arizona
dart4forte
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 16,161
Mesa, Arizona
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The relay kit that Crackedback sells will make your day. I have a Powermaster on the GTS. Works great. Lights don’t dim while idling. I got the 60 amp alternator in natural finish, took it down to the parts store and had it bench tested. It was right on at 60 amps.
Last edited by dart4forte; 03/26/18 01:24 PM.
“So if it’s on the internet it must be true”
Abe Lincoln
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Re: Looking for a higher powered alternator
[Re: dart4forte]
#2472304
03/26/18 02:28 PM
03/26/18 02:28 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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Well! Changing to the solid state voltage regulator on my '64Dog with its completely stock 37(?) amp alternator solved the lights dimming at idle problem.
Here are some truisms:
A 120 amp alternator with a decent voltage regulator puts out exactly the number of amps the system requires. A 120 amp alternator will put out up to its rating if you load up the system. Throwing 120 amps at a 37 amp system loaded more than its capacity WILL cause any weak spots to become obvious, as the magic smoke escapes into the air.
Having battery voltage drop, as an instantaneous load is applied, is normal. What you see as the voltage rises to the right number is what the voltage regulator is supposed to do. As it senses system voltage dropping, it increases the field current to increase alternator output.
Most of the loads hooked to the power circuit have an instantaneous inrush current which is two to three times the operating current.
Back in the day I bought a small round ammeter device that was held against the line in question and read out amps. I can not find it now.
R.
Last edited by dogdays; 03/26/18 02:29 PM.
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Re: Looking for a higher powered alternator
[Re: dogdays]
#2472333
03/26/18 03:33 PM
03/26/18 03:33 PM
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Joined: Aug 2007
Posts: 6,098 Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,098
Valencia, España
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Here are some truisms:
A 120 amp alternator with a decent voltage regulator puts out exactly the number of amps the system requires.
CORRECT A 120 amp alternator will put out up to its rating if you load up the system.
CORRECT Throwing 120 amps at a 37 amp system loaded more than its capacity WILL cause any weak spots to become obvious, as the magic smoke escapes into the air.
will mean the wiring and connections are underrated by the systems requirement, but not an alt fault. When the alt is not enough the batt will provide the lack of power from alt ( discharge reading ). So the load remains the same, just the source changes. And still will mean is underrated. This becomes worst when the batt is discharged, which will add MORE LOAD to the system. THIS is the failure. We need to keep the batt out of the play becoming on a load sucker ( charge reading ) after being sucked out so... if your car sucks average 25 amps at iddle and the alt just sources 18-20 amps while iddling, the rest of load ( 5-7 amps ) will be provided by the batt. Once you rev up the engine, the batt becomes on part of the sucker system, so your car is NOT anymore a 25 amps sucker, but mostly sure the full alt output... 35 amps. But 10 amps takes QUITE LONG to get recharged the batt on the car. This is what gets stressed the system, coming and going. conclusion... an alt able to feed everything at iddle, and reinforce the wiring up to ammeter... done. The car will keep sucking the same load, the batt won't suck anymore because won't be sucked anymore, and will ge an stable power system AND NOTHING hooked to the batt, because this will be read by the ammeter as a charge, being not a charge
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: Looking for a higher powered alternator
[Re: Kern Dog]
#2472509
03/26/18 09:52 PM
03/26/18 09:52 PM
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Joined: Apr 2012
Posts: 18,880 -
RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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I am not interested in the 1970s basketball sized alternator, thank you.
(Frankie... Go find you a 100-amp LN... Like the old Mopar Cop cars had... OEM...
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Re: Looking for a higher powered alternator
[Re: RSNOMO]
#2473276
03/28/18 12:44 PM
03/28/18 12:44 PM
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Joined: Sep 2003
Posts: 19,589 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,589
north of coder
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I am not interested in the 1970s basketball sized alternator, thank you.
(Frankie... Go find you a 100-amp LN... Like the old Mopar Cop cars had... OEM... or a modern 100/120 amp nippondenso 3 wire from a dakota or minivan, etc. you can change out the serpentine for a v-belt pulley easy enough. and they work for a long, long time, so even a junkyard unit will work, and is cheaper to boot than a new one.
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