Powermaster 10si Style Alternators Product images may differ from actual product appearance. Excellent output at idle Proof of Performance tag GM has offered several series of alternators over the years, each time taking a step up in performance. The great thing about these alternators and aftermarket brackets is that for the most part they are interchangeable. Starting with the externally regulated 10dn alternator of the 1960s and moving all the way to the CS130D alternator of late, aftermarket brackets with rod end tensioners will interchange. The 2" mounting foot width is common to all of them and the 6.61" bolt spacing is common (except the CS130D. the CS130D is a 7.24" bolt spacing although many brackets will accommodate this.) 10si Alternators 65A Specifications 40A @ 2,400 rpm @ 13.2 VDC @ 77F Operating Range: -40C to 150C Max rpm: 16,000 100A Specifications 30A @ 2,400 rpm @ 13.2 VDC @ 77F Operating Range: -40C to 150C Max rpm: 16,000

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