Is that enough RPM to drive the accessories at idle?
Interesting they de-rated the alternator starting partway through the 2014 MY
Generator (3.5L GTDI, early production)
Rating 200 amps
Output 109/191 amps (max) @ 600-2,000 engine rpm
Pulley ratio 2.66:1
Generator (3.5L GTDI, late production)
Rating 175 amps
Output 88/175 amps (max) @ 600-2,000 engine rpm
Generator (Police)
Rating 220 amps
Output 103/217 amps (max) @ 600-2,000 engine rpm
Pulley ratio 2.67:1
Ford DG1Z-10346-B
Alternator Assy
200 Amp
Fit Note: Heavy Duty Alternator, Standard Duty Alternator
Fitting Vehicle Options: (-) Police Version
Base Number: 10346
Callout Name: 10346
$565.36 $465.02
1
Ford DG1Z-10346-C
Alternator Assy
220 Amp
Fit Note: Extra Heavy Duty Alternator
Fitting Vehicle Options: Police
Base Number: 10346
Callout Name: 10346
Replaced by: GB5Z-10346-C
$781.29 $543.38
1
Ford DG1Z-10346-F
Alternator Assy
175 AMP
Fit Note: Heavy Duty Alternator, Standard Duty Alternator
Fitting Vehicle Options: (-) Police Version
Base Number: 10346
Callout Name: 10346
$398.73 $350.07