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**hatzie** · 04-30-2018, 09:14 AM

The 3/6/9-12 mounting ear 12SI alternators can be had in stock dress in the 94 Amp range. The 7294-3 3:00 94A 12SI is the least expensive and most reliable easy upgrade... as long as you don't need more than 94A.

1986-1995 CS130 & CS144 with 3/6/9-12 ears are easy upgrades. Unfortunately, they are also throwaway alternators. The pre-1996, CS series alternators only have one fan and the diodes heatsink to the rear housing close to the bearing, where there's not much external airflow, so the heat eventually cooks the grease if the regulator and diodes make it that long.

The 1996 and later CS130D and up to 2005 AD series alternators have two fans and a more open housing allowing better cooling but they don't mount the same as the older Vee-belt drive DN & SI series and the pre-1996 serpentine CS130. Not a big deal if you're upgrading to the 1996 & later Vortec smallblock serpentine accessory system but it's a deal breaker for the pre-1996 Serpentine CS and Vee-belt SI.

04-30-2018, 09:14 AM	#7
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 5,020	Re: Ford Alternator The 3/6/9-12 mounting ear 12SI alternators can be had in stock dress in the 94 Amp range. The 7294-3 3:00 94A 12SI is the least expensive and most reliable easy upgrade... as long as you don't need more than 94A. 1986-1995 CS130 & CS144 with 3/6/9-12 ears are easy upgrades. Unfortunately, they are also throwaway alternators. The pre-1996, CS series alternators only have one fan and the diodes heatsink to the rear housing close to the bearing, where there's not much external airflow, so the heat eventually cooks the grease if the regulator and diodes make it that long. The 1996 and later CS130D and up to 2005 AD series alternators have two fans and a more open housing allowing better cooling but they don't mount the same as the older Vee-belt drive DN & SI series and the pre-1996 serpentine CS130. Not a big deal if you're upgrading to the 1996 & later Vortec smallblock serpentine accessory system but it's a deal breaker for the pre-1996 Serpentine CS and Vee-belt SI. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful. Last edited by hatzie; 04-30-2018 at 02:27 PM.