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Re: [GMCnet] Alternator Question (just curious) [message #361907 is a reply to message #361892] Thu, 21 January 2021 18:28 Go to previous messageGo to previous message
Matt Colie is currently offline  Matt Colie   Canada
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Registered: March 2007
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Ray Erspamer wrote on Thu, 21 January 2021 12:22

Will  Delco 24si 165 Amp Alternator work in a GMC?
https://www.jittruckparts.com/delco-remy-delco-remy-24si-160a-alternator-8600310?gclid=CjwKCAiA6aSABhApEiwA6Cbm__nqIvkprmdfyMrcRSX1djiuDAGSov_6Zb3 L9yrw2v6aZeF0WH-zcxoCsgEQAvD_BwE
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Ray,

Both this and the OE 27SI are J180 hinge mounts, so that much might bolt on and it is a remote sense for the regulator so that is good.

The two issues that bother me are:
I could not find my dimensioned drawings of the 27SI to compare, but the front offset might be different so it might be a trick line the belt up.
It does not seem to have the tapped hole that is part of the adjustment retention in our installation.

If you are doing this because there is no 27SI available, look around a little more. Both the 27SI 80& 100s were produced in massive quantities but don't buy a 27SI 200, because those are a different frame.

If you are doing this to get better charging, be ready to be disappointed. The problem is not the alternator capability, but the system can't manage the load so the voltage drop in the wiring comes to be the limiting factor. My 80amp will (given the right conditions) top out short term at 96~98 amps, but the single belt would smoke. The big difference is that my coach is a 23 with the house bank in the right front.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
 
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