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Big alternator or little alternator... |
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Turbo301 
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Joined: 11-March-2007 Location: London, Ontario Status: Offline Points: 331 |
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 Topic: Big alternator or little alternator...Posted: 21-November-2009 at 5:36AM |
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Does anyone know how to ID whether or not a car (in this case, my '77 XR7) has the optional high-current alternator? They apparently require different drive belts, and I didn't want to buy the wrong one, but I don't know how to tell which alternator I have. Given that my car has very few options, I'm betting it has the small one, but then again being bought in Ontario it may have been "winter equipped", so to speak.
Did the high-capacity alternator come standard with rear defroster or any other electricity-hungry options?
Thanks for any help!
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1977 Cougar XR7
1980 turbo Trans Am 2009 Pontiac G8 GT |
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72sport
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Joined: 22-October-2006 Location: Wisconsin Status: Offline Points: 614 |
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Posted: 21-November-2009 at 5:56AM |
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The high current alternator has a plug that plugs into top of the case + the large diameter charge wire. The base alternator all the wires have their own terminal and are on the back of the case. Post a pick and we can tell you wich you have.
Tom
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Tom
1972 Gran Torino Sport 4Spd 1974 Montego wagon "GT" with GT hood, correct buckets seats, console, and floor shift 2013 Focus 5 speed- Daily driver |
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Psquare75
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Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4591 |
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Posted: 21-November-2009 at 9:34AM |
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if you pull the alternator, the amperage rating should be on the case.
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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Turbo301
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Joined: 11-March-2007 Location: London, Ontario Status: Offline Points: 331 |
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Posted: 21-November-2009 at 1:07PM |
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Wow, I'm a dumb-a$$ :D. It's amazing what a photograph will tell you. I took a shot with the flash on and saw "15 V, 70 A" on the case; I never noticed this when examining it under regular lighting. Can you guys confirm that this is what you'd expect a 70 A alternator to look like? Is that a stock size and basic configuration (one never knows what parts get replaced over the years)?
Thanks!
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1977 Cougar XR7
1980 turbo Trans Am 2009 Pontiac G8 GT |
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72sport
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Joined: 22-October-2006 Location: Wisconsin Status: Offline Points: 614 |
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Posted: 21-November-2009 at 3:37PM |
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Yeah, thats the high current alternator. With no power windows it probably got it because of the rear defrost or it may have been optioned with it, but either way it looks stock and original. The alternator on my wagon is a remained unit and it no longer has the amp rating stamped on it. |
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Tom
1972 Gran Torino Sport 4Spd 1974 Montego wagon "GT" with GT hood, correct buckets seats, console, and floor shift 2013 Focus 5 speed- Daily driver |
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Psquare75
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Posted: 27-November-2009 at 2:45AM |
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I see an antifreeze puddle there..
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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Turbo301
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Joined: 11-March-2007 Location: London, Ontario Status: Offline Points: 331 |
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Posted: 27-November-2009 at 2:55AM |
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Yeah, I had the rad flushed before putting it away, so I think some slopped. Come the spring I'll keep an eye on it to make sure it's not leaking ^_^.
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1977 Cougar XR7
1980 turbo Trans Am 2009 Pontiac G8 GT |
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