Coverting from an SI to a CS alt. Help!!
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Joined: Jul 1999
Posts: 130
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From: United States of America
Car: Firebird
Engine: LG4
Transmission: Auto
Coverting from an SI to a CS alt. Help!!
I am wanting to convert from my old SI style alt to a newer CS style. When i go to an autoparts store, what should i ask for? The later Firebirds that came with CS alts arent interchangeable with the old style ones cause of the mounting flanges (i know, i've tried. Bought one from pep boys and it didnt fit 
). A need an alt that has one of the flanges thats for the pivot bolt. The other flange should be directly across from it and is for the bolt that goes in the slotted bracket. I am wanted a alt that has the most amps avail cause of my stereo. Thanks
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Wheels of fire burn the night, Ride across the sky
Wheels of fire burning bright, We live to ride
[This message has been edited by firestorm (edited September 29, 2000).]
). A need an alt that has one of the flanges thats for the pivot bolt. The other flange should be directly across from it and is for the bolt that goes in the slotted bracket. I am wanted a alt that has the most amps avail cause of my stereo. Thanks------------------
Wheels of fire burn the night, Ride across the sky
Wheels of fire burning bright, We live to ride
[This message has been edited by firestorm (edited September 29, 2000).]
Supreme Member
Joined: Jul 1999
Posts: 1,335
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From: Tucson, AZ, USA
Car: '92 Z28; Dk Teal; Her Pkg
Engine: 305
Transmission: Richmond 6 Spd
Axle/Gears: Moser 9", Detroit Locker, 3.70
What do SI & CS stand for Standard Int'l & Canadian Standard? What year is your car?
The alts up through '86 were the "large body" type with a V belt drive. In '87 GM switched to the smaller body type with a serpentine belt drive, but mounted in the same location (pass side) - the other accys were still on V belts. In '88 GM switched to the single serpentine setup - the alt was moved to the driver's side & has a different geometry than the previous year models.
Tim
The alts up through '86 were the "large body" type with a V belt drive. In '87 GM switched to the smaller body type with a serpentine belt drive, but mounted in the same location (pass side) - the other accys were still on V belts. In '88 GM switched to the single serpentine setup - the alt was moved to the driver's side & has a different geometry than the previous year models.
Tim
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Joined: Jul 1999
Posts: 43
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From: Tampa, Fl, USA
Si is the series of alternator pre-87 on our cars.CS is post 87. SI are more commonly known as "1 wire" alternators. A hint for you. our(autozone) part numbers have clocking in the end. (1342 6 11) 6 aclock mounting with 11 aclock thread. our stores have picture applicatio guides with case diameter, clocking, and pulley design. ask to see that and go from there. we also sell the connector to convert it.
if you have any other questions, email me
if you have any other questions, email me
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