Adventure Driven Talk

Tech Questions and How-To Articles => Mitsubishi Related => Topic started by: GrantCee on March 18, 2019, 03:53:06 PM

Title: Question about alternator upgrade
Post by: GrantCee 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?
Title: Re: Question about alternator upgrade
Post by: Shovel 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.
Title: Re: Question about alternator upgrade
Post by: GrantCee 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.