Antidive impacts brake balance during the transient period at the onset of
braking. Steady state, it doesn't impact brake balance. It's analgous to
how shocks can effect understeer/oversteer during yaw transients but don't
have an effect in steady state handling.
Setting up a race car involves alot of compromises. The endpoints of 0% or
100% antidive aren't optimum but some point in between is. Depends on car,
driver, track, course, etc.
-- Rick Brown
> -----Original Message-----
> From: owner-ba-autox@autox.team.net
> [mailto:owner-ba-autox@autox.team.net]On Behalf Of James Creasy
> Sent: Wednesday, July 02, 2003 11:01 AM
> To: Rick Brown; Kevin Stevens; Larrybsp@aol.com
> Cc: BayArea Team.Net
> Subject: Re: antidive
>
>
> so i can adjust my brake balance with anti-dive? so perhaps i
> should reduce
> it, not eliminate it.
>
> that might be worthwhile for me, as i have my valve full open to the rear,
> plus more aggressive rear pads.
>
> james
>
>
> ----- Original Message -----
> From: "Rick Brown" <rbrown7@covad.net>
> To: "James Creasy" <james@thevenom.net>; "Kevin Stevens"
> <Kevin_Stevens@pursued-with.net>; <Larrybsp@aol.com>
> Cc: "BayArea Team.Net" <ba-autox@autox.team.net>
> Sent: Wednesday, July 02, 2003 10:55 AM
> Subject: RE: antidive
>
>
> > Sort of. Antidive takes the spring and shocks out of the
> weight transfer
> > equation. The spring rate and damping of th tires is controlling the
> > forward weight transfer. Now if your brake balance is set up
> properly for
> > steady-state maximum braking, you will get front brake lockup with the
> onset
> > of heavy braking with a geometry high in antidive.
> > --- Rick Brown
> >
> > > -----Original Message-----
> > > From: owner-ba-autox@autox.team.net
> > > [mailto:owner-ba-autox@autox.team.net]On Behalf Of James Creasy
> > > Sent: Wednesday, July 02, 2003 8:42 AM
> > > To: Rick Brown; Kevin Stevens; Larrybsp@aol.com
> > > Cc: BayArea Team.Net
> > > Subject: Re: antidive
> > >
> > >
> > > so anti-dive acts as a stiffer spring, but just when
> decelerating? this
> > > reminds me of using sway bars to differentially increase
> spring rate for
> > > lateral weight transfer (turning). this would seem to be a good thing
> to
> > > me.
> > >
> > > i dont want any higher front spring rate, as it has a big
> effect on ride
> > > comfort.
> > >
> > > james
> > > OSP - Obtuse Suspension Problems
> > >
> > > ----- Original Message -----
> > > From: "Rick Brown" <rbrown7@covad.net>
> > > To: "Kevin Stevens" <Kevin_Stevens@pursued-with.net>;
> <Larrybsp@aol.com>
> > > Cc: "BayArea Team.Net" <ba-autox@autox.team.net>
> > > Sent: Sunday, June 29, 2003 7:15 PM
> > > Subject: RE: antidive
> > >
> > >
> > > > Antidive increases the rate that the weight transfers. Same physics
> hold
> > > for
> > > > braking as for cornering as Kevin noted. You don't want to transfer
> the
> > > > weight too quickly for reasons Larry states, but you want the car
> > > responsive
> > > > for quick transitioning. It's a tradeoff.
> > > >
> > > > > -----Original Message-----
> > > > > From: owner-ba-autox@autox.team.net
> > > > > [mailto:owner-ba-autox@autox.team.net]On Behalf Of Kevin Stevens
> > > > > Sent: Saturday, June 28, 2003 11:28 PM
> > > > > To: Larrybsp@aol.com
> > > > > Cc: BayArea Team.Net
> > > > > Subject: Re: antidive
> > > > >
> > > > >
> > > > > On Saturday, Jun 28, 2003, at 23:10 US/Pacific,
> > > Larrybsp@aol.com wrote:
> > > > >
> > > > > > eliminate antidive in autocrossing. Its a beneficial
> characteristic.
> > > > > > Without
> > > > > > antidive as soon as you hit the the brakes you are going to
> compress
> > > > > > the front
> > > > > > springs and increase the load on the front tires. Remember the
> > > > > > traction circle. If
> > > > > > the tire is loaded from braking forces it loses turning
> capability.
> > > > > > Not only
> > > > >
> > > > > Aren't you transferring the weight up front anyway? Just as was
> > > > > mentioned the other day with lateral transfer, how much is
> transferred
> > > > > is just a factor of the CG and deceleration rate. Or is it that
> > > > > regardless of the transfer, you don't want to get that much
> suspension
> > > > > movement?
> > > > >
> > > > > > have you have used up much of your suspension travel, when
> > > you start
> > > > > > your
> > > > > > turn and introduce body roll you can bottom your suspension at
> which
> > > > > > point you
> > > > > > have no suspension and all the weight transfer load will go to
> that
> > > > > > tire causing
> > > > > > it to lose traction.
> > > > >
> > > > > Got it. So analogous to lateral roll, it's A Bad Thing primarily
> > > > > because it upsets the suspension or takes it out of the favorable
> part
> > > > > of its operating range, not because of any inherent
> physics reason,
> > > > > right?
> > > > >
> > > > > KeS
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