[MARKDTN]

You need to figure out how many amps you need at idle to properly answer this question.

Dual fans could be drawing 40 amps-or more-at idle. I believe most of the si alternators had roughly half capacity at idle, so an 100 amp si alternator is about 50 amps at idle. So you throw in ignition and some lights and it won't charge sitting still anymore. The cs144 alternators have better low amperage charging and are very robust. I would not even consider a cs130, they are not even good paperweights IMHO! The cs144 lowest amps is 140 I believe so it leaves plenty of room for future electrical expansion.