Rolly Polly Physics... WAS Re: battery relocation question

[boisfort@myhome.net (Decker)]

 Hi Jason;
     I'm no expert but I would think the most gain would be as low as
 possible for CG, as far back as possible for weight distribution and as far
 to the passenger side as possible to off set the drivers weight on the left
 side of the car. Back in the prehistoric days when I owned and drove a
swing
 axle 58 Porsche the race shop I went to put 2 degrees negative camber in
the
 rear on the drivers side and 3 degrees on the passenger side to compensate
 for my lard butt.
 Brian Decker
 Western WA
 79 Scirocco
> ----- Original Message -----
> From: "Jason Adams" <roclist@accessconsulting.ca>
> To: <haygood@aemail4u.com>; "Drew Teague" <roccnroll@hotmail.com>;
> <rocco_crossing@hotmail.com>; <scirocco-l@scirocco.org>
> Sent: Wednesday, February 26, 2003 11:58 AM
> Subject: Rolly Polly Physics... WAS Re: battery relocation question
>
>
> > I meant, "no matter how" as lower the c.g. if you can by whatever means,
> > i.e. remove sunroof, remove headliner, swap glass to plexi, sit yer fat
> ass
> > lower in the car, and if you can mount the battery lower than the stock
> > position.  All of these actions will lower the c.g. of the car, whether
> it's
> > practical, noticable, I won't say. I'm just talking hypothetically here.
> I
> > haven't said anything about altering the first moment of inertia here,
> which
> > would also occur with any of the afore mentioned actions.  Is it good
for
> > this? I don't know. What would be better? Placing the battery as far
back
> to
> > help weight distribution, or closest to c.g. / c.m. to minimize
rotational
> > inertia.  This is an important question for me, not saying I know the
> > answer, as my ice racer experiences large moments as I swing it through
> the
> > twisties on the track.  Insight from knowelegable folks is most welcome.
> > I'm inclined to mount the battery at the front of the spare tire well
> > (compromise between lowering cm and lowering rotational inertia) is this
> > correct? However if I wish to lower the rotational inertia more would it
> be
> > better to place the battery between the rear shock towers, (closer to
the
> > yaw axis).  Or does this stuff matter at all because we are only messing
> > with a small percentage of the total mass. BTW, in attempts to lighten /
> > decrease rotational inertia (yaw axis) i have removed the bumpers.
> >
> > Ain't Newtonian mechanics fun....
> >
> > Jason Adams
> > Fahrvergnugen Forever! ;)
> > 84 rocco 16v
> > 93 320i
> > 98 Z71
> >
>
>