You've hit the nail on the head Ken. The magic of a Datsun 1600 is equal
"go" for far less "dough."
----- Original Message -----
From: "Ken Abraham" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, 8 January 2001 21:40 PM
Subject: Re: Brakes - Long
> Listers,
> Remember that 4 and more piston calipers are alloy and very light and so
> contribute less to the unsprung weight.
> Sliding calipers are basically boat anchors (too heavy) as far as proper
> full-house, no expense spared racing and rallying.
> But we are lowly privateers and road car drivers and don't need the extra
> 3/10ths of bugger-all per kilometre speed difference.
>
> Personally, I really enjoy out driving expensive cars and hella-modified
> cars in my cheap but big-hearted rides.
> We probably spend less on the whole car than they spend on wheels and
> tyres!!!
> Regards,
> Nick
> ----- Original Message -----
> From: Brad HALLETT <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Monday, 8 January 2001 9:39 PM
> Subject: RE: Brakes - Long
>
>
> > Excellent point Luke
> >
> >
> > Regards
> > Brad HALLETT
> > http://www.powerup.com.au/~bhallett
> >
> > http://www.datrats.com.au for all Datsun performance equipment!
> >
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Luke Clough
> > Sent: Tuesday, 9 January 2001 10:22
> > To: [EMAIL PROTECTED]
> > Subject: Re: Brakes - Long
> >
> >
> > I think the problem with slide arm setup is the flex that you get. This
> > leads to
> > more pressure exerted at the outer edge of the rim than the inner (maybe
> > better
> > for cooling!), with opposing pistons the caliper body would be a lot
> stiffer
> > than the effective body of the sliding arm type. The step from 2 to 4
> piston
> > calipers (and 6 piston) allows the pressure to be distributed more
evenly
> > across
> > the area of the pad. Resistance is not exactly equal to the normal force
> > multiplied by the coefficient of friction. High pressure spots would
lead
> to
> > localised regions of overheating on the pads, which could reduce the
> > effectiveness of the part of the pad that is doing the most work. Just
my
> > thoughts on the debate. Remember most race cars use 4 and 6 pot calipers
> for
> > a
> > good reason. The amount of force developed is still down to your leg
(plus
> > booster) pushing the fluid hard enough to create the desire pressure,
the
> > rest
> > is just ratios of cylinder areas and a trade off between peddle drop
> > (smaller
> > m/c = larger pressure for the same leg generated force) and the feeling
of
> a
> > hard brake peddle.
> >
> > Luke Clough
> >
> > Brad HALLETT wrote:
> >
> > > Thrill seekers
> > > I too agree that the force exerted on each side would be close to
equal,
> > as
> > > there is no real mechanical advantage or disadvantage afforded by the
> > > slide-arm setup (want of better wording). Some force would have to be
> > lost
> > > in the transfer though, due to heat, binding of components etc, and a
> lag
> > in
> > > activation would occur as the system relies on the cylinder side to
> apply
> > > pressure before activating the non culinder side. I still think two
or
> > four
> > > pots are the way to go simply due to the even and immediate
distribution
> > > applied to the rotors. Doesn't make a hell of a difference to
braking,
> > but
> > > component wear and reliability would have to be enhanced.
> > >
> > > Regards
> > > Brad HALLETT
> > > http://www.powerup.com.au/~bhallett
> > >
> > > http://www.datrats.com.au for all Datsun performance equipment!
> >
> >
>
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