Home » Public Forums » GMCnet » 28SI Alternator vs 27SI
28SI Alternator vs 27SI [message #360217] |
Fri, 20 November 2020 11:46 |
TR 1
Messages: 348 Registered: August 2015 Location: DFW
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So I'm working on a project to increase the capacity on the factory alternator above 100 amps, and I came across this page on the Delco Remy website which I believe says the 27SI was superseded by the 28SI.
http://www.delcoremy.com/find-a-part/product-details/27si-alternator
The dimensions of the 28SI seems roughly the same as the 27SI, and they both seem to use the same "J180" mounting style. The 28SI seems to be used a lot on heavy duty trucks, school buses, etc. and is offered in factory amperages of 130-200 which slots in nicely above the 27SI.
I have an email inquiry in to Delco Remy to see if they can confirm this information, but wanted to check here to see if anyone may already be running a 28SI.
Looking online, it appears you can find aftermarket 200amp 28SIs for a little over 100 bucks... And Genuine Delco Remys for a little over 200 bucks.
Either way, I will post back here with what I find.
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
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28SI Alternator vs 27SI
By: TR 1 on Fri, 20 November 2020 11:46
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Re: 28SI Alternator vs 27SI
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Re: 28SI Alternator vs 27SI
By: TR 1 on Fri, 20 November 2020 18:19
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Re: 28SI Alternator vs 27SI
By: TR 1 on Fri, 20 November 2020 18:37
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Re: 28SI Alternator vs 27SI
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Re: 28SI Alternator vs 27SI
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Re: 28SI Alternator vs 27SI
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Re: [GMCnet] 28SI Alternator vs 27SI
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Re: 28SI Alternator vs 27SI
By: JohnL455 on Sat, 21 November 2020 19:47
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Re: 28SI Alternator vs 27SI
By: JohnL455 on Sun, 22 November 2020 18:35
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Re: 28SI Alternator vs 27SI
By: TR 1 on Mon, 23 November 2020 08:25
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Re: 28SI Alternator vs 27SI
By: JohnL455 on Mon, 23 November 2020 10:16
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Re: 28SI Alternator vs 27SI
By: TR 1 on Mon, 23 November 2020 10:34
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Re: [GMCnet] 28SI Alternator vs 27SI
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Re: [GMCnet] 28SI Alternator vs 27SI
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Re: [GMCnet] 28SI Alternator vs 27SI
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Re: [GMCnet] 28SI Alternator vs 27SI
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Re: [GMCnet] 28SI Alternator vs 27SI
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Re: [GMCnet] 28SI Alternator vs 27SI
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Re: [GMCnet] 28SI Alternator vs 27SI
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Re: 28SI Alternator vs 27SI
By: TR 1 on Mon, 23 November 2020 12:04
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Re: 28SI Alternator vs 27SI
By: TR 1 on Wed, 25 November 2020 09:58
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Re: 28SI Alternator vs 27SI
By: TR 1 on Wed, 25 November 2020 12:22
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Re: 28SI Alternator vs 27SI
By: mghamms on Wed, 25 November 2020 12:35
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Re: 28SI Alternator vs 27SI
By: TR 1 on Wed, 25 November 2020 13:14
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Re: 28SI Alternator vs 27SI
By: mghamms on Wed, 25 November 2020 13:45
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Re: 28SI Alternator vs 27SI
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Re: 28SI Alternator vs 27SI
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Re: 28SI Alternator vs 27SI
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Re: 28SI Alternator vs 27SI
By: mghamms on Thu, 26 November 2020 10:51
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Re: 28SI Alternator vs 27SI
By: TR 1 on Fri, 04 December 2020 12:58
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