Not worthy of its own thread but there may be a few folks that are currently running a GM charging system or one day wish to convert.
Here is the back story.
When I did the original engine swap on the 40 the alternator I went with was a high output (140 Amp) 10si unit. "10si" is a family of alternators introduced in the 1969 corvette and installed in a majority of early model GMs. They never came as 140 Amp units but several aftermarket makers filled the need. Issue .... it did great and lasted almost 20 years but it produced a fair amount of electric noise and the output at idle was poor.
Last week the old 10si finally died and while a rebuild wouldn't be a big deal I thought it a nice excuse to perform an upgrade.
Goal: Convert 10si charging system to CS130 charging system.
With the advent of more car accessories GM needed a better alternator. One that could produce cleaner electricity, had better cooling, better total output, and better output at low RPM's. What replaced the 10si is the CS130 (and later the CS144).
The unit is smaller but if you grab the correct model the bolt pattern is the same. Here are the details:
Part number: AC Delco 334-2355A (One application is a 1990 Buick LaSabre 3.8 liter). Maximum output = 105 Amps
Output at 2000 RPM (Alternator RPM, not engine RPM) = 68 Amps.
So, Job one .... head to the store and let the young one watch the awesome conveyor belts:
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While you are there you will also want to pick up the connector that will allow you to make an easy connection from the alternator into your harness. Here is the part number:
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Because of my old school V-belt setup I needed to swap pulleys.
CS130 on the left, 10si on the Right:
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After bolt up and changing from old style to new style connector:
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And for the best part ... Engine idling at 800 RPM, turn on the lights, and the voltmeter didn't budge.
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