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Alternator idle output
#664956
04/09/10 03:38 AM
04/09/10 03:38 AM
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Joined: Jan 2007
Posts: 401
Norway
General 68
OP
mopar
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OP
mopar
Joined: Jan 2007
Posts: 401
Norway
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I am looking at getting a stock appearing alternator that provides enough idle output to not dim the headlights. What alternator should I get? I have been looking at this one but not sure about its idle output. http://www.summitracing.com/parts/PWM-7419/
Last edited by General 68; 04/09/10 03:48 AM.
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Re: Alternator idle output
[Re: hooziewhatsit]
#664960
04/09/10 12:27 PM
04/09/10 12:27 PM
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Joined: Apr 2003
Posts: 512
Sacramento, CA
Bdrainy
mopar
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mopar
Joined: Apr 2003
Posts: 512
Sacramento, CA
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Quote:
Quote:
I just took this one off and made the switch to the Denso alternator. Wish I would have done the swap a long time ago!!! Not stock looking but works so well that I dont care!!
You don't happen to have a part number for that alt, do you? What amperage is it?
I don't know the part number...but its a 60amp unit from a 85-92 toyota 4runner. I got the brackets to mount it from http://www.arengineering.com/
and picked up the alternator on ebay for about $50.
At idle (750rpm) I can have the headlights on (brights), foot on the brake, a blinker on, radio, windshield wipers, and heater blower on full blast and my voltmeter only dipped to 13 volts.
There is a write up about it in the tech archives:
http://www.moparts.org/Tech/Archive/elec/34.html
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Re: Alternator idle output
[Re: General 68]
#664963
04/09/10 05:24 PM
04/09/10 05:24 PM
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Joined: Oct 2006
Posts: 3,054
USA
b54406barrel
master
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master
Joined: Oct 2006
Posts: 3,054
USA
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Quote:
Maybe dumb question, but what is the difference between the squareback and the older style? I would like the setup to have a stockish look.
Mainly the back half of it. It's literally got a rectangular area that holds the heat sink & diodes. Little better diodes & better heat sink & a little less failure prone. Here's a not-great shot from the front & as you can see, not much difference. No one I know of has ever noticed it. The main difference as far as amperage output on chrysler alternators is the armature windings so you can actually switch those out. I wound some myself, years ago but there are several alternator rebuild companies that can fix you up.
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Re: Alternator idle output
[Re: General 68]
#664964
04/09/10 06:15 PM
04/09/10 06:15 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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Quote:
I would like the setup to have a stockish look.
You have a 69/earlier single field terminal setup?) I'd suggest a late 70's squareback alt (78 amp iirc but check archives) and ground 1 brush where it mounts to the case, a stock appearing voltage reg w the black case but w electronic internals rather than the stock electromechanical $25 to your door in the US and clean/check voltage drops at EVERY connection and Nacho's 2 extra wires parallel bypass drilled THRU the 2 main feed in/out brass connections in the firewall bulkhead. It'd all look oe ex for the alt somewhat. EDIT Might consider a relay under the hood to feed the headlites directly from the alt output wire side (which'd keep your ammeter reading correctly)
Last edited by RapidRobert; 04/09/10 06:43 PM.
live every 24 hour block of time like it's your last day on earth
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Re: Alternator idle output
[Re: General 68]
#664965
04/10/10 02:05 AM
04/10/10 02:05 AM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Quote:
I am looking at getting a stock appearing alternator that provides enough idle output to not dim the headlights. What alternator should I get? I have been looking at this one but not sure about its idle output. http://www.summitracing.com/parts/PWM-7419/
Depends on your maximum engine RPM. If you plan to spin the engine 7,000+ RPM you really need an alternator that will handle the high RPM, but if the engine is mild and does not rev really high, you can use a smaller alternator pulley or larger crank pulley to get more power from the alternator at idle (speed up the alternator rpm at idle.)
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