Author Topic: Question about alternator upgrade  (Read 173 times)

GrantCee

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Question about alternator upgrade
« on: March 18, 2019, 03:53:06 PM »
Iím preparing to drop in a Starion 75-amp alternator in place of the 50-amp unit in my í87 4-cyl. However, Iíve been looking at the charging wire running from the alternator, and itís a pitiful thing; I havenít measured the conductor to be sure, but it looks like no more than a 10-gauge wire.

Looking at wiring charts, it tells me that a 5-foot run (which is about what it is from the alt to the battery) at 75-amps requires a 4-gauge wire. Thatís a big difference from whatís in there!

Should I upgrade that stock wire before putting the new alternator in?

Shovel

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Re: Question about alternator upgrade
« Reply #1 on: March 18, 2019, 07:05:03 PM »
heh... that's a definite yes  :)    Thanks to the starter your block-to-battery ground might already be stout enough but more of those never hurt either.

GrantCee

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Re: Question about alternator upgrade
« Reply #2 on: March 19, 2019, 03:22:57 PM »
I've decided on a 4-gauge charging wire going through a 60amp ANL (slow-blow) fuse block (Blue Sea). In addition, I'm going to a "star ground" topology with 3 separate 4-gauge grounds from the battery (to body, to frame, and to engine). I'm also going to upgrade all existing grounds over the next year.