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battery relocation question

Just a quick question after reading this:  Would handling be better with the 
weight closer to the ground (i.e. spare tire well) or farther back to 
distribute the weight a bit more evenly?  Not having had much experience 
with all this, I would imagine getting it closer to the ground would reduce 
roll a bit, which I would think would be optimal.

...My $.02

Drew

**Drew Teague**
Harrisburg, PA

`84 8v Rocco --  "Bruise"
`85 BMW 318





>From: Haygood <haygood@aemail4u.com>
>Reply-To: haygood@aemail4u.com
>To: "Jason Adams" <roclist@accessconsulting.ca>,"Rhett Farnum" 
><rocco_crossing@hotmail.com>, scirocco-l@scirocco.org
>Subject: Re: battery relocation question
>Date: Tue, 25 Feb 2003 08:22:26 -0800 (PST)
>
>Deep cycle means you can discharge it more without killing it.  They are 
>used for things like trolling motors on boats that do a lot of work between 
>charges.  You don't need that.  You want gell cell.
>
>As for mounting position, don't just worry about countering your weight.  
>These cars have over 60% of there weight on the front end.  Counter that!  
>Put the batt as far back as you can get it.  The whole "centered over the 
>rear axle" thing is a mystery to me as well.  Sounds nice, but from an 
>engineering standpoint there is nothing magical about that area.
>
>The downside of placing it further back is that the further from the CG you 
>place things, the harder it is to rotate the car in a turn.  If, for 
>example, your car's weight distribution starts out at 65% front and 35% 
>rear, you are 15% away from the ideal of 50/50 (which is itself debateably 
>ideal, but go with it).  Basic numbers I ran a while back (so they may have 
>lost accuracy with time :) ), suggested that putting the batt behind the 
>rear seat would make you something like 62/37, and putting it in the rear 
>of the trunk did something like 60 or 61/whatever.  Keep in mind that a 
>difference of "1" there is huge because we are only "15" away from the 
>ideal.
>
>So there is an incentive to move it far back.
>
>As for the increased rotational inertia, that batt., when in the rear of 
>the trunk, is no further from the rear axle than it was from the front 
>axle.  The inertia gain is probably small compared to the inertia of the 
>whole car, which is dominated by the engine hanging out in front of the 
>front axle.  The increase in rotational inertia (really it's the first 
>moment of inertia we are talking about, to be tech-ish), would hurt you in 
>transitions, but then the improved weight distribution would help you in 
>transitions as well as the rest of the turns.  Prolly close either way, and 
>either way is better than stock, but getting the battery further back than 
>the rear seat is prolly a very good idea.
>
>HTH.
>
>Brian
>
>
> >----- Original Message -----
> >From: "Rhett Farnum" <rocco_crossing@hotmail.com>
> >To: <scirocco-l@scirocco.org>
> >Sent: Monday, February 24, 2003 2:17 PM
> >Subject: Re: battery relocation question
> >
> >
> >>
> >> So, is a dry cell the same as a deep cycle? Or are they different and 
>what
> >> is the best to run in our cars.
> >>
> >> ALSO, I am thinking of putting my bettery where the back passenger seat
> >> would be inorder to counter my wieght and balance the car better while
> >> autoXing. What would be the best way to attach the box and where to run
> >the
> >> vent?
> >>
> >>
> >> Peace Out,
> >> Rhett
> >> Rocco_crossing
> >> '83 Rocco (autocross ready, 20 days till season opener)
> >> '92 Olds Cutlass Ciera (DD)
> >>
> >>
> >>
> >>
> >>
> >> >From: "Josh20V" <mkii@nycap.rr.com>
> >> >To: <scirocco-l@scirocco.org>
> >> >Subject: Re: battery relocation question
> >> >Date: Mon, 24 Feb 2003 16:35:06 -0500
> >> >
> >> >just as a side note, this is the one Im going with.
> >> >
> >> >http://www.jshouseofeuro.com/images/stinger.jpg
> >> >
> >> >Its a Stinger brand dry cell.
> >> >
> >> >24.9 lbs / 5" H x 6-9/16" W x 6-7/8" D
> >> >
> >> >Josh Able
> >> >www.JsHouseOfEuro.com
> >> >BrandNew Eurobumpers in stock
> >> >check out the forums!
> >> >----- Original Message -----
> >> >From: "Vince Royer" <vince@performancecarstereo.com>
> >> >To: "Joe Doty" <Joe.Doty@lcnetwork.com>; "Ryan H" <rhock99@epix.net>;
> >> ><scirocco-l@scirocco.org>
> >> >Sent: Friday, February 14, 2003 7:21 PM
> >> >Subject: RE: battery relocation question
> >> >
> >> >
> >> > > Just a note on all this battery stuff.  Here's my take:
> >> > >
> >> > > I wanted to get the weight of the battery right between the 2 
>wheels
> >and
> >> >as
> >> > > low as possible to lower the center of gravity.  In the future I 
>think
> >I
> >> > > will cut out the well and make my own, but I'll wait for the stereo
> >work
> >> >to
> >> > > start that.  For now I dropped the battery box down into the wheel
> >well
> >> >as
> >> > > far forward as possible and scewed it down.
> >> > >
> >> > > I'm using 1/0 phoenix gold power cable, through a 350 amp circuit
> >> >breaker.
> >> > > I have a distribution block up front sending 4 AWG to the Starter & 
>4
> >> >AWG
> >> >to
> >> > > the Alternator.  I used the battery I had, it has a vent hose which 
>I
> >> >routed
> >> > > out the bottom.
> >> > >
> >> > > I also have another neat trick.  I recently had my car stolen and
> >really
> >> > > don't want it happening again. If a theif cuts your battery cable,
> >alarm
> >> > > goes bye-bye.  So I ran a second 8 gauge cable from the battery
> >directly
> >> > > into the main power input from the fusebox.  That way I was able to
> >> > > eleminate the old corroded wire coming through the firewall.  
>Suddenly
> >> >all
> >> > > my electronic devices performed better - like all the 
>bulbs/wipers/fan
> >> >etc.
> >> > > I guess I freed up some electrons, but the biggest thing I gained 
>was
> >> >the
> >> > > security.  Now there is no way of disabling the alarm from outside 
>the
> >> >car.
> >> > >
> >> > > Cheers!
> >> > >
> >> > > Vince
> >> > >
> >> > >
> >> > >
> >> > > -----Original Message-----
> >> > > From: scirocco-l-admin@scirocco.org
> >> > > [mailto:scirocco-l-admin@scirocco.org]On Behalf Of Joe Doty
> >> > > Sent: Friday, February 14, 2003 2:29 PM
> >> > > To: Ryan H; scirocco-l@scirocco.org
> >> > > Subject: RE: battery relocation question
> >> > >
> >> > >
> >> > > I used a bench vise.  Worked great!
> >> > >
> >> > > Joe Doty
> >> > > IT/Development
> >> > > joe@lcnetwork.com
> >> > >
> >> > > > -----Original Message-----
> >> > > > From: Ryan H [mailto:rhock99@epix.net]
> >> > > > Sent: Friday, February 14, 2003 1:30 PM
> >> > > > To: scirocco-l@scirocco.org
> >> > > > Subject: Re: battery relocation question
> >> > > >
> >> > > > All this battery talk brings about an interesting question of 
>mine:
> >I
> >> > > > bought the cheapo Summit kit, what kinda tool should I use to 
>crimp
> >> > > the
> >> > > > end connectors (battery terminal connections are pre-crimped
> >already)?
> >> > > I
> >> > > > don't think my trusty wire cutter/crimper will work for 2 gauge
> >wire.
> >> > > ;)
> >> > > >
> >> > > >
> >> > > > _______________________________________________
> >> > > > Scirocco-l mailing list
> >> > > > Scirocco-l@scirocco.org
> >> > > > http://neubayern.net/mailman/listinfo/scirocco-l
> >> > >
> >> > > _______________________________________________
> >> > > Scirocco-l mailing list
> >> > > Scirocco-l@scirocco.org
> >> > > http://neubayern.net/mailman/listinfo/scirocco-l
> >> > >
> >> > >
> >> > > _______________________________________________
> >> > > Scirocco-l mailing list
> >> > > Scirocco-l@scirocco.org
> >> > > http://neubayern.net/mailman/listinfo/scirocco-l
> >> > >
> >> >
> >> >
> >> >_______________________________________________
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> >>
> >>
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