Alternator Question (just curious)

> 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
> Sent from my U.S.Cellular© Smartphone

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
 
I just happened to see it and was curious. I have a perfectly good military=
grade 27si with an isolated ground and a spare.=C2=A0 It kust looked very =
similar.Sent from my U.S.Cellular=C2=A9 Smartphone -------- Original mes=
sage --------From: Matt Colie via Gmclist Date: 1=
/21/21 6:29 PM (GMT-06:00) To: gmclist Cc: Matt Colie Subject: Re: [GMCnet] Alternator Question (just curiou=

165 Amp Alternator work in a=C2=A0 GMC?> https://www.jittruckparts.com/delc=
o-remy-delco-remy-24si-160a-alternator-8600310?gclid CjwKCAiA6aSABhApEiwA=
6Cbm__nqIvkprmdfyMrcRSX1djiuDAGSov_6Zb3> L9yrw2v6aZeF0WH-zcxoCsgEQAvD_BwE> =
Sent from my=C2=A0 U.S.Cellular=C2=A9 SmartphoneRay, Both this and the OE 2=
7SI are J180 hinge mounts, so that much might bolt on and it is a remote se=
nse for the regulator so that is good.=C2=A0 The two issues that bother me =
are:I could not find my dimensioned drawings of the 27SI to compare, but th=
e 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 ret=
ention in our installation.=C2=A0 If you are doing this because there is no=
27SI available, look around a little more.=C2=A0 Both the 27SI 80& 100s we=
re produced in massive quantities butdon't buy a 27SI 200, because those ar=
e a different frame.=C2=A0 If you are doing this to get better charging, be=
ready to be disappointed.=C2=A0 The problem is not the alternator capabili=
ty, but the system can't managethe load so the voltage drop in the wiring c=
omes to be the limiting factor.=C2=A0 My 80amp will (given the right condit=
ions) top out short term at 96~98amps, but the single belt would smoke.=
=C2=A0 The big difference is that my coach is a 23 with the house bank in t=
he right front.Matt=C2=A0=C2=A0=C2=A0=C2=A0 -- Matt & Mary Colie - Chaumi=
=C3=A8re -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES Electronically Contr=
olled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Contro=
l ArmsSE Michigan - Near DTW - Twixt A2 and Detroit________________________=
_______________________GMCnet mailing listUnsubscribe or Change List Option=
s:http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Could a local rebuilder bring a 27si up to military specs? And what what would be the difference between the two?
Scott
--
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
installed MSD Atomic EFI
Houston, Texas
 
We had a couple of pickups which GM had modified to 24 volts using the isolated ground alternator in my unit. Really scary kludge which never worked
very well. They ought to work just fine in a 12V system though.

--johnny
--
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
 
> Could a local rebuilder bring a 27si up to military specs? And what what would be the difference between the two?
> Scott

Scott,

My father ran a mil-spec job shop for about 25 years. Back in the elephant jokes days, one of his favorites was "What is an Elephant?"
Answer = It is a Mil-Spec mouse.

There is a lot involved in the Military Materials Acquisition standards so they are not something you can stick-on. There are all kinds of things you
would not think of in this. For many things, it starts with material traceability.

I could go on (and on and on....) But I will cut it off here by giving my personal opinion (after reading this stuff for years) that it would not be
possible for anybody to take an "off the shelf" 27SI and rework it to comply with the appropriate military standards.

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
 
One difference is there's an isolated ground terminal. Sent from my U.S.Cellular© Smartphone
-------- Original message --------From: Scott Nutter via Gmclist Date: 1/22/21 10:11 AM (GMT-06:00) To: gmclist Cc: Scott Nutter Subject: Re: [GMCnet] Alternator Question (just curious) Could a local rebuilder bring a 27si up to military specs? And what what would be the difference between the two?Scott-- Scott Nutter1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrerainstalled MSD Atomic EFIHouston, Texas_______________________________________________GMCnet mailing listUnsubscribe or Change List Options:http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org