Member Credit: EddyMaxx

In the process of installing my supercharger (which runs of alternator), I decided to upgrade my OEM alternator to a DC Power 270 Amp Alternator. The OEM alternator is 110 amps. I paid $300 bucks for the DC 270 Amp Alternator. They usually go for $600+ according to the DC Power website.

The DC Power alternator was a direct fit to my 2004 6thgen Maxima. The installation was also straight-forward. I also did the “BIG 3” and upgraded all the wires to 1/0 gauge. This included the grounds and charge wire. I upgraded my battery to a Northstar AGM31 as well (but will save that for another post).

Please keep in mind the factory cables weren’t designed to handle the power of a higher-output alternator, and can restrict the flow of electricity (or cause cables to fry up). The “BIG 3” upgraded is highly recommended.


  • 2002 -2006 Nissan Altima 3.5L V6 VQ35DE
  • 2004 -2008 Nissan Maxima 3.5L V6 VQ35DE

Installation Photos:

OEM Alternator

DC Power Alternator vs OEM Alternator 

Perfect Fitment

Additional Reference Photos: Name: P1020432.jpg Views: 21 Size: 103.6 KB

 Alternator Specs
Mounting Type Direct fit to OEM Mounting
Output Voltage 14.8
Idle Amperage 200
Hot Idle Amperage @ 200ºF 180
Max Amperage 270
Hot Max Amperage @ 200ºF 250
Pulley 6 Groove Hard Anodized 6061 Billet Aluminum
Doesn’t affect vehicles PCM, Check Engine Light or Charge Light Yes – w/ Supplied Adapter Harness
SKU 13940-270-XP
Stator Configuration 6 Phase Hairpin
Average A/C Ripple Current 3 Amps
Positive Output Stud Size 8MM x 1.25 Copper
Temperature Compensation Yes with 3-Step Thermal Protection
Rectifier 12 50 amp press fit diodes
Rectifier Heatsink Aluminum

my4dsc: 51