looking for high amp alternator that charges at idle
#1236428
05/20/12 04:11 PM
05/20/12 04:11 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
OP
Senior Management
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OP
Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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I'm looking for a drop in alternator with a high output at idle. I understand the Powermaster alternators will do that but they don't drop in without changes to the brackets. I don't have time to cobble something together before the power tour but I'd like to change the alternator.
The blower motors each pull 20 amps. If I have the A/C running and lights on at idle it will pull the stock alternator down pretty hard.
Does anybody have any experience with an alternator that fits these needs?
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: looking for high amp alternator that charges at idle
[Re: feets]
#1236429
05/20/12 04:48 PM
05/20/12 04:48 PM
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Joined: Feb 2003
Posts: 8,671
Andrewh
master
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master
Joined: Feb 2003
Posts: 8,671
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Re: looking for high amp alternator that charges at idle
[Re: Andrewh]
#1236430
05/20/12 05:49 PM
05/20/12 05:49 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
OP
Senior Management
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OP
Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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I know about hot rodding the stock alternators but they're not known to charge well at idle.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: looking for high amp alternator that charges at idle
[Re: feets]
#1236432
05/20/12 06:55 PM
05/20/12 06:55 PM
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Joined: Dec 2004
Posts: 10,552 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,552
Rittman Ohio
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Feets I have a Denso unit from a Toyota pick-up I scored during cash for clunkers and it performs flawlessly at all RPM's Get the parts to install it from AndyF's site www.arengineering.comGus
Last edited by fourgearsavoy; 05/20/12 06:58 PM.
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: looking for high amp alternator that charges at idle
[Re: feets]
#1236433
05/20/12 08:16 PM
05/20/12 08:16 PM
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Joined: Jan 2003
Posts: 5,443 Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,443
Indiana
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""I understand the Powermaster alternators will do that but they don't drop in without changes to the brackets.""
Both of my Powermaster alternators dropped right in with no problems to the brackets. 63a at idle and 90a max. is what my current tag states.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: looking for high amp alternator that charges at idle
[Re: YO7_A66]
#1236434
05/20/12 08:19 PM
05/20/12 08:19 PM
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Joined: Aug 2003
Posts: 12,291 Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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Would a different diameter pully help ?
I am truckless..
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Re: looking for high amp alternator that charges at idle
[Re: YO7_A66]
#1236436
05/20/12 08:23 PM
05/20/12 08:23 PM
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Joined: Jan 2003
Posts: 5,899 Athens, Greece
Pyper70
master
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master
Joined: Jan 2003
Posts: 5,899
Athens, Greece
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dropped in a Power Master 140amp on my 70 Charger, 440 Non-AC, never modified a bracket for it. You gotta make sure its tightened good though. When I put my foot down the belt would tighten up, flex the alternator and the back of it would tap the cylinder head, kill the fusible link.
Clean up your engine bay, remove your voltage regulator. I run a Delco on my 69. Cleaner engine bay, less wires, Start the car, rod check to 1500rpm's. Alternator on and charging at 14.0v. 100amp alternator
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: looking for high amp alternator that charges at idle
[Re: feets]
#1236437
05/20/12 08:30 PM
05/20/12 08:30 PM
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Joined: Jan 2004
Posts: 3,001 Coram, NY
Pool Fixer
master
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master
Joined: Jan 2004
Posts: 3,001
Coram, NY
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Quote:
I'm looking for a drop in alternator with a high output at idle. I understand the Powermaster alternators will do that but they don't drop in without changes to the brackets. I don't have time to cobble something together before the power tour but I'd like to change the alternator.
The blower motors each pull 20 amps. If I have the A/C running and lights on at idle it will pull the stock alternator down pretty hard.
Does anybody have any experience with an alternator that fits these needs?
130 amp denso of an 02 RAM van bolts to a 440 with the smallest of mods. Trim 1/2" of one bolt spacer, get a used 70's GM alt pulley, go to hardware store and buy 2 nuts. It doesn't get much easier than that. of course you have to a little wiring but that's going to have to be done on ANY high output alternator you get.
It will sit close to the block, but it's workable. I've had mine on the charger for 10 years and it flat out kicks azz. With every single thing in the car turned on (electric fuel pump, electric fans, hi brights, heater on high) I still measured 14v at idle. There are other versions of this alternator. I remember seeing a lot of them in the 90 amp range and DIRT cheap.
Denso Alt Swap Linky
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Re: looking for high amp alternator that charges at idle
[Re: Pool Fixer]
#1236438
05/20/12 09:58 PM
05/20/12 09:58 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
OP
Senior Management
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OP
Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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I ran one of the Denso alternators on the hot rod. It required different brackets and pulleys. I compared the Denso alternator with an old square back today. The pulleys don't quite line up. I would have to cut down the alternator bracket that bolts to the cylinder head then see what other changes would be required.
The Imperial has a smog pump, A/C, power steering, and water pump to run off the crank pulley. I have axed the smog pump but it still required a different crank pulley.
I am not going to have the time to fiddle around making brackets. Between now and the Power Tour I have exactly one free day to play with the car.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: looking for high amp alternator that charges at idle
[Re: jsully]
#1236443
05/20/12 11:26 PM
05/20/12 11:26 PM
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Joined: Jan 2003
Posts: 70,126 Here
DirectSubjection
Tacohead. The First and Only
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Tacohead. The First and Only
Joined: Jan 2003
Posts: 70,126
Here
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I was looking into the same thing and ruled out the Powermaster 140 too. I see Tuff-Stuff makes some listed at 100A units, this one is Chrysler square back and externally regulated (internal version there too). But I have no experience with them on knowledge of what they really put out. http://www.summitracing.com/parts/TFF-7509RCSP/
Ride eternal, shiny and chrome
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Re: looking for high amp alternator that charges at idle
[Re: feets]
#1236445
05/21/12 02:02 AM
05/21/12 02:02 AM
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Joined: Mar 2007
Posts: 3,277 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,277
West Coast, USA
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I'm using an AC Delco CS 144 alternator on my 1970, because it puts out 115 amps at idle over 200 amps above a fast idle. Nothing mentioned here even comes close.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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