[s-cars] G60 brakes

[Steve Marinello]

Huh??  back at you, Richard.

I always calculated it the same way as Keith...total cross sectional area of
the two pistons compared to the single piston, giving an advantage way less
than 26%.  Could you explain your math/logic to me?

Thanks,

Steve

----- Original Message -----
From: "Richard Tanimura" <richard at tanimuras.com>
To: "Keith Maddock" <Keith.Maddock at TRW.COM>; <s-car-list at audifans.com>
Sent: Monday, October 27, 2003 8:17 AM
Subject: RE: [s-cars] G60 brakes


> Huh??
>
> The front G60 calipers are 45mm and the rear G60 calipers are 36mm. You
> can't just add them.
>
> What we have to compare is 2 x 45mm with 2 x 56.8 mm (which you correctly
> calculated as the equivalent of 44 and 36). This means the Big Reds are
26%
> larger than the G60's which is what I originally suspected.
>
> Rich
>
> -----Original Message-----
> From: Keith Maddock [mailto:Keith.Maddock at TRW.COM]
> Sent: den 27 oktober 2003 09:36
> To: s-car-list at audifans.com; richard at tanimuras.com
> Subject: Re: [s-cars] G60 brakes
>
>
> Rich,
>
> I should have worded my statement a little bit better.
>
> I said:
> "G60's have two pistons with the same effective size as an about 60mm
> piston."
>
> I should have said:
> "G60's have two pistons that together have the same effective size as one
> approx.  60mm piston."
>
> Looking at the data from Jimmy's site, it should be more accurate to say
> that the two pistons together (45mm & 36mm) are the same effective size as
a
> single 57.6mm piston.
> Perhaps they should have called it the G58 instead of the G60 !
>
> Regardless, to my original point, this is still larger than Big reds, with
> 44mm and 36mm pistons, which together  are the same effective size as a
> single 56.85mm piston.
>
> Thanks for pointing this out.
>
> Cheers,
> Keith
>
>
>
> Keith Maddock, TRW Automotive,  Koblenz, Germany
> Slip Control Systems, Systems Design, Traction Control
> +49 (0)261/ 895 2474    -   -   keith.maddock at trw.com
>
>
> >>> "Richard Tanimura" <richard at tanimuras.com> 21:43:52 25.10.2003 >>>
> Keith Maddock stated on this list that the G60 had 60mm pistons. I
stumbled
> over this information on
> http://www.urs4.com/technical/brakes/UrS4_brakes.html which indicates this
> might be incorrect.
>
> I am not in the least interested in being picky. Keith has helped me
> enormously in the past. But incase the data is important to someone, I
> suggest atleast that they double check the data.
>
> Rich
>
>
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