Grounding question for my rear battery setup

[sukchew at cox-internet.com (Chuck Blue)]

I installed a battery box in the rear and ran a heavy +wire to the starter 
and grounded the - in the luggage compartment.Just make sure all connections 
are good and you will be okay.
ole blue
----- Original Message ----- 
From: "GGehrke" <ggehrke@gmail.com>
To: "Scirocco list" <Scirocco-l@scirocco.org>
Sent: Monday, March 13, 2006 10:18 AM
Subject: Grounding question for my rear battery setup


> So I'm about to finish planning my electrical system and start
> ordering parts and have a question about the grounding system...
>
> I'm putting the battery in the rear and running a beef power cable up
> front to a distribution block where the battery used to sit.  That
> should give me a good strong positive terminal for the starter,
> alternator, headlights, etc.  I'm debating, though, whether I need to
> run a beefy ground cable along with it.  I'm planning to use a really
> heavy cable or grounding strap to attach the battery negative directly
> to the car body where I mount it.  Would it be sufficient, then, to
> put a distribution block up front (and, for example, under the dash,
> or wherever else) and ground it with a heavy cable?  I'm thinking use
> the car itself to make a good connection rather than have to run more
> heavy gauge wire all over the place.  I figure then I'd branch off the
> front distribution block to ground the engine, etc, and put a distro
> block under the dash to ground any of my under dash stuff.
>
> I'm thinking as a bit of a compromise I might just ground the battery
> really well and run lighter gauge (8, probably) wire up to a distro
> block under the dash and then one up at the very front where the batt
> used to be, plus ground those blocks to the chassis.
>
> Any thoughts from the list?
>
> I wish I had the luxury of actually checking it out to see what kind
> of voltage drops I'd get and really compare the two theories, but I
> have neither the time nor regular access to the car to 'experiment'.
> :(
>
> Oh, and another crucial planning question - I am putting a master
> cutoff switch on the battery as well.  Should I put it in the positive
> or negative line?  Usually when I see bentley instructions they say to
> "remove the negative terminal" so that seems like a good bet, but I'm
> not really sure it would make the least bit of difference...
>
> -Grant-
>
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