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<blockquote data-quote="brian84corvette" data-source="post: 5447705" data-attributes="member: 586635">my vette had terrible ground wires factory ( 1984 ) and severe voltage issues at first alsoI ended up making all kinds of new wiring for the car.the best upgrade to wiring to date was the big 4.using 2 guage wire - I made runs from the battery negative to :&nbsp; engine block / frame / ******and from positive on the battery - to the alternator - using a 100a fuze near the alternator,&nbsp; and a electrical cut off switch near the battery ( allows me to turn off that wire - preventing battery drain thru energizing the polarity of alternator during engine not running. )my car is made of fiberglass - so im in the uni body boat as you.&nbsp;&nbsp; our cars are terrible conductors of electricity.when I added a second battery -&nbsp; I used 2 guage wire running from pos to pos - and also 2 guage running neg to neg.&nbsp; -&nbsp; I ground my amps directly on the rear battery negative,&nbsp; and also have a rear battery negative to ground wire I made.so im still using the car frame to ground - while also using the battery neg to ground.along with that 2 guage wire running up to front battery - wich then gets distributed to engine / ****** / front frame rail .after upgrading all those wiresI find that my system sounds way cleaner.&nbsp;&nbsp; less static noise&nbsp; or what ever you call itsilent noise or general clarity has greatly improved.along with me being able to blast the system while driving and not seeing below 14v</blockquote>

[QUOTE="brian84corvette, post: 5447705, member: 586635"] my vette had terrible ground wires factory ( 1984 ) and severe voltage issues at first also I ended up making all kinds of new wiring for the car. the best upgrade to wiring to date was the big 4. using 2 guage wire - I made runs from the battery negative to : engine block / frame / ****** and from positive on the battery - to the alternator - using a 100a fuze near the alternator, and a electrical cut off switch near the battery ( allows me to turn off that wire - preventing battery drain thru energizing the polarity of alternator during engine not running. ) my car is made of fiberglass - so im in the uni body boat as you. our cars are terrible conductors of electricity. when I added a second battery - I used 2 guage wire running from pos to pos - and also 2 guage running neg to neg. - I ground my amps directly on the rear battery negative, and also have a rear battery negative to ground wire I made. so im still using the car frame to ground - while also using the battery neg to ground. along with that 2 guage wire running up to front battery - wich then gets distributed to engine / ****** / front frame rail . after upgrading all those wires I find that my system sounds way cleaner. less static noise or what ever you call it silent noise or general clarity has greatly improved. along with me being able to blast the system while driving and not seeing below 14v [/QUOTE]

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