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Delco 40SI 2nd Gen Alternator Product Information.

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   40SI           Heavyduty Brushless Alternator

Features & Benefits:

• Brushless Advantage: fewer moving parts means less wear and longer life 

• Equipped with Remote Sense which can reduce battery charge time by 50% 

• OE approved, assuring OE quality and performance for aftermarket replacements 

• Superior output producing up to 320 Amps at road speed and 190 Amps at idle 

• Warranty: 3 year/unlimited miles*

High Efficiency = Fuel Economy

High efficiency translates to less engine horsepower
requirements, resulting in substantial fuel savings.

Real time operating data was collected on several vehicle applications for the overall vehicle and electrical system.

The following chart shows the fuel cost savings over a typical life cycle by increasing the alternator efficiency from 60% to 72%.

                     New 8600280 $ 868.20


Vehicle Type & Miles DrivenAverage CurrentFuel Cost with a 60% Efficient AlternatorFuel Cost with a 72% Efficient Alternator (40SI)Savings
Line Haul Tractor (500k mi)84 Amps$4,534$3,778$756
City Tractor
(350k mi)
40 Amps$2,235$1,863$372
School Bus
(250k mi)
102 Amps$9,040$7,533$1,057

Based on diesel fuel at $4/gal

For more product info 8600280.