PA Performance 03-04 Cobra 170amp Alternator

PA Performance 03-04 Cobra 170amp Alternator

**Pulley Not Included** Please choose the correct pulley size according to the specific combination you run on your car.

**THE 170 AMP ALTERNATOR IS ONLY USED FOR THOSE RUNNING HIGH WATT AFTERMARKET STEREO ACCESSORIES**

This is a very popular replacement where slightly increased capacity is needed. This unit will increase the charging capacity at all RPM Ranges with NO modifications.

• Common on Ford DOHC Applications in 2003 & 2004 only and 3.8L applications from 2001 - 2004
• This unit is a direct replacement with NO modifications
• 90 amps at idle @ 950 rpm
• 170 amps maximum @ 3000 rpm
• The stock belt can be used on original equipment vehicles
• Actual Alternator Weight is 12.9 lbs
• All units are 100% NEW and come complete with internal voltage regulator.

To calculate the alternator shaft speed, which should be no more than 16,000 RPM do the following:

Alternator pulley size (ie 2.5")

Crankshaft Pulley Size (ie 5")

Ratio is 2:1 (5 / 2.5 = 2)

Max engine Speed = 5800 RPM

Multiply Max RPM x Ratio (5800 x 2) = 11,600 shaft RPM Max

Idle RPM = 1000

Multiply Idle RPM x Ratio (1000 x 2) = 2000 shaft RPM @ Idle

An alternator needs 1800-2000 at idle to make power and will make maximum output at 6000 rpm, and will start to fail at 16,000 RPM.