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battery relocation question
I would expect that lowering the c.g. of the car is good no matter how it's
done, that being said the lower the battery, the better...
Jason Adams
Fahrvergnugen Forever! ;)
84 rocco 16v
93 320i
98 Z71
----- Original Message -----
From: "Drew Teague" <roccnroll@hotmail.com>
To: <haygood@aemail4u.com>; <roclist@accessconsulting.ca>;
<rocco_crossing@hotmail.com>; <scirocco-l@scirocco.org>
Sent: Tuesday, February 25, 2003 8:57 AM
Subject: Re: 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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> > >> >Scirocco-l@scirocco.org
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> > >>
> > >>
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