Delco Remy All-Makes 24SI brush style alternators are designed with dual internal fans which provide maximum cooling technology and improve the operating efficiency & durability of the unit. The 24SI is offered in 12 volt models capable of producing up to 160 Amps at road speed & 100 Amps at idle & 24 volt models capable of producing up to 70 amps.  The 24SI is available in both J180 Hinge Mount or Pad Mount configurations.

Dual Internal Fan Alternators

When replacing an external fan alternator with an internal fan alternator DO NOT take the external fan from the original model and apply to the internal fan alternator. This will result in pulley and belt misalignment.

Tech Tip Video: Dual Internal Fans

Delco Remy 28SI high output Alternators are designed to address vehicle applications that require higher electrical output, but also want lower weight, improved temperature capability, and fuel savings.  Vehicles, such as school buses, not using a premium high output alternator will likely experience premature failures due to high under-hood engine temperatures.  Delco Remy 28SI alternators are designed using our Dual Internal Fan technology which improves the operating efficiency and durability of the unit.

1. 28SI Alternators can withstand high under-hood engine temperatures of up to 125°C
2. 28SI Alternators come standard with Remote Sense technology
3. 28SI Alternators provide higher electrical output up to 200Amps 

This All-Makes replacement option produces superior output at road speed and at Idle. For more information, please click the part within the eCatalog to view the specifications of this product. 

If you have any additional questions, please do not hesitate to contact our Technical Service Team at 800-372-0222 & select option #2 for Technical Support.