Correct LS5 alternator?
Thread Starter
Instructor
Joined: Mar 2011
Posts: 127
Likes: 2
Correct LS5 alternator?
This is the alternator that came on my 70 LS5. It's supposedly a 100 amp alternator. The ground bolt hole is right up against the valve cover (Crane reproduction). Is this the correct alternator? The AIM shows the electrical connection coming in from the side like you would see on a "9 o'clock" alternator but shows the ground bolt in the same location as mine. The "9 o'clock" alternator has the bolt hole near the top so it would resolve the problem. Thoughts?
Race Director
Joined: May 2006
Posts: 18,662
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there is a picture in this link of the alternator and the plug is not on the top
http://forums.corvetteforum.com/c3s-...eed-coupe.html
http://forums.corvetteforum.com/c3s-...eed-coupe.html
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,334
From: North of Toronto - Ontario
Check the unit, most 10si alt are 63A units although aftermarket ones are being rated with higher outputs
You'll need to reclock it around 90 deg. to get it to fit
Even then it's tight to the valve cover depending on your belts.
Mooser
Race Director
Joined: Oct 2000
Posts: 12,639
Likes: 3,101
From: Shamong, NJ
No 70 Corvette (or any 68-82 Corvette) ever came with a 100 amp alternator. The part number and amperage, should be stamped in the body, right near the bolt hole where the adjusting bracket attaches.
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,334
From: North of Toronto - Ontario
Re-Clocking a 10si is pretty straight forward, or if it's not something you want to get into, take it to a local alt/starter shop and they should be able to do it while you wait.
HIH
Mooser
HIH
Mooser
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