i drove my rx7 around with 1.5 *inches* of toe-out (after an adjustment with
a hill at thunderhill) for a while, and didnt even notice it. autocrossed
it too.
-james c
OSP - Our Snake Pit
----- Original Message -----
From: "Mike Clements" <mikec@actional.com>
To: "james creasy" <Black94PGT@pacbell.net>; "Michael R. Clements"
<mrclem@telocity.com>; "John J. Stimson-III" <john@harlie.idsfa.net>
Cc: "J C" <veloimpreza@yahoo.com>; <ba-autox@autox.team.net>
Sent: Wednesday, April 10, 2002 3:42 PM
Subject: RE: Educate me on alignment
I'm pretty sure the alignment is in spec. Of the options you list, looks
like toe-in is what I need to adjust.
So now it's: (a) more front toe-in to reduce twichy steering. (b) more
rear toe-in to reduce power oversteer.
Thanks!
> -----Original Message-----
> From: owner-ba-autox@autox.team.net
> [mailto:owner-ba-autox@autox.team.net] On Behalf Of james creasy
> Sent: Wednesday, April 10, 2002 14:41
> To: Michael R. Clements; 'John J. Stimson-III'
> Cc: 'J C'; ba-autox@autox.team.net
> Subject: Re: Educate me on alignment
>
>
> there are a number of things that can result in twitchy
> freeway steering.
>
> other than an alignment out of desired spec:
>
> 1. too high tire pressure
> 2. too much front toe-out
> 3. bump steer
> 4. too much sway bar rate
> 5. too much steering boost (you can install a valve (from
> Heidts) to dial in a restriction)
>
> what did i miss?
>
> -james c
> OSP - Once Sub Par
>
>
> ----- Original Message -----
> From: "Michael R. Clements" <mrclem@telocity.com>
> > Well I'm glad I opened my big mouth! I guess I'll keep my
> +7 degrees
> > caster. And if the tire wear is even at -1.5 camber, what
> can I do to
> > desensitize the steering?
> >
> > The underdrive pulleys helped a bit, probably by slowing down the
> > power steering pump. But I would like to make the car just
> a bit less
> > twitchy. Any advice?
> >
> > Thanks,
> >
> > > -----Original Message-----
> > > From: james creasy [mailto:Black94PGT@pacbell.net]
> > > Sent: Wednesday, April 10, 2002 14:19
> > > To: John J. Stimson-III; Michael R. Clements
> > > Cc: 'J C'; ba-autox@autox.team.net
> > > Subject: Re: Educate me on alignment
> > >
> > >
> > > more positive caster increases the self-centering force,
> stabilizing
> > > the car.
> > >
> > > more importantly, (in my double a-arm suspension anyway), more
> > > positive caster increases the rate of negative camber gain under
> > > compression- a good thing!
> > >
> > > -james c
> > > OSP - Often Suspension Primping
> > >
> > > ----- Original Message -----
> > > From: "John J. Stimson-III" <john@harlie.idsfa.net>
> > > To: "Michael R. Clements" <mrclem@telocity.com>
> > > Cc: "'J C'" <veloimpreza@yahoo.com>; <ba-autox@autox.team.net>
> > > Sent: Wednesday, April 10, 2002 2:07 PM
> > > Subject: Re: Educate me on alignment
> > >
> > >
> > > > On Wed, Apr 10, 2002 at 12:44:13PM -0700, Michael R. Clements
> > > > wrote:
> > > > > For example, my car turns in too fast and the steering
> > > gets darty at
> > > > > freeway speeds. Also it has too much power oversteer. So
> > > when I get
> > > > > my alignment done next, I'm going to reduce the positive
> > > caster up
> > > > > front from its current +7 degrees, down to maybe +5 or
> > > so. Hopefully
> > > > > that will slow down the steering and make it a bit
> less twitchy.
> > > >
> > > > I thought that caster stabilized the steering by creating a
> > > > self-centering force. I would think that less caster would
> > > make the
> > > > car more twitchy. Some Miata drivers who traded off their
> > > caster to
> > > > get more camber wound up having the steering wheel pull to
> > > the inside
> > > > of the turn when the course got tight. That's got to
> take you by
> > > > surprise...
> > > >
> > > > Have you considered a little less toe out (or more toe in) up
> > > > front?
> > > >
> > > > --
> > > >
> > > > john@idsfa.net
> > > John Stimson
> > > > http://www.idsfa.net/~john/
> > > HMC Physics '94
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