here's more confusion,
my car lifts the inside front tire unless my corner weights are spot-on, so
that tire that im all worried about isnt even doing anything! does toe only
contribute on corner entry then?
-james
----- Original Message -----
From: "James Creasy" <james@thevenom.net>
> but ackermann WORKS *because* it changes the front toe-out on turns? or
am
> i hopelessly confused? isnt the method to make the two front wheels
> describe two different sized arcs completely defined by the additional
> toe-out?
>
> -james
>
>
> ----- Original Message -----
> From: "Barry Spencer" <bspencer@tsoft.com>
> To: "Charles Cox" <charles@coastalbay.com>; "ba-autox"
> <ba-autox@autox.team.net>
> Cc: <james@thevenom.net>
> Sent: Wednesday, January 08, 2003 2:48 PM
> Subject: Re: Ackerman
>
>
> > Charles,
> >
> > The Ackerman is measured through the center of the TRE and the king pin
> and
> > then both those lines meet somewhere close to the center of the diff,
> > depending what % of Ackerman the car has. Changing the rack position
> doesn't
> > change those lines so the Ackerman stays the same, but it does change
the
> > toe-out on turns.
> >
> > Thanks
> >
> > Barry Spencer - Owner
> > Spencer's Motorsports
> >
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Charles Cox" <charles@coastalbay.com>
> > To: "ba-autox" <ba-autox@autox.team.net>
> > Cc: <james@thevenom.net>
> > Sent: Wednesday, January 08, 2003 2:15 PM
> > Subject: Ackerman
> >
> >
> > > Actually moving the rack will change the Ackerman as will toe and
other
> > > alignment changes. They are two separate things but are inter-related.
> If
> > it
> > > could be done, properly setup Ackerman steering would align the
king-pin
> > > centerline with the steering arm to tie-rod end connection with the
> > > centerline of the rear axle. Unfortunately, there are many variables
> that
> > > change this effect some of which include king pin angle, height and
> > location
> > > of steering rack, height and angle of steering arm, etc. You also need
> to
> > > consider bump-steer, roll-steer, roll-couple among other things.
> > >
> > > Charles
> > > mailto:charles@coastalbay.com
> > >
> > >
> > > ----- Original Message -----
> > > From: "Barry Spencer" <bspencer@tsoft.com>
> > > To: "James Creasy" <james@thevenom.net>; <ba-autox@autox.team.net>
> > > Sent: Wednesday, January 08, 2003 12:28 PM
> > >
> > >
> > >
> > > > Hi James,
> > > >
> > > > Ackerman and toe-out on turns are two seperate things. Changing the
> rack
> > > > position won't change the ackerman, but it will change the toe-out
on
> > > turns.
> > > > On custom made/kit cars you need to measure the toe-out on turns,
for
> > > > example if you turn your steering wheel half a turn on an average
> autox
> > > > course, measure what toe-out on turns you have at that point, don't
> > forget
> > > > to add your static toe setting to that amount. Let me know what that
> > > > measurment is and let's go from there.
> > > >
> > > > Thanks
> > > >
> > > > Barry
> > > >
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "James Creasy" <james@thevenom.net>
> > > > To: <ba-autox@autox.team.net>
> > > > Sent: Wednesday, January 08, 2003 11:11 AM
> > > > Subject: ackermann tuning for autox?
> > > >
> > > >
> > > > > i know ive asked this before, but here i am again...
> > > > >
> > > > > i am right in the middle of changing the position of my steering
> rack
> > to
> > > > put
> > > > > more ackermann in my car. i think it changes it from about -100%
> > > > ackermann
> > > > > to +30%. however ive got no clear idea of how to determine how
much
> i
> > > > > should have. i know it has been debated for years, but modern
tire
> > > > > composition might warrant higher amounts of it.
> > > > >
> > > > > will anyone else that has set up this give me any hints? what
> should
> > i
> > > > look
> > > > > for in tire temps, etc. (this is with dot-r tires. )
> > > > >
> > > > > the bonus question is what about my car might make it have an
> unusual
> > > > > affinity for hoosiers- a good two seconds faster than on kumhos
(on
> > > > > concrete). or are kumhos just that much worse on concrete but not
> so
> > > > > different on asphalt?
> > > > >
> > > > > thanks,
> > > > >
> > > > > -james
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