Re: Wilwoods Vs G60s for 4KQ (yet more info)

["Gary G. Erickson" <erickson@teleport.com>]

glen wrote:

> Audi 200 series-Ate Front 89-91               HB135.700
> Audi 200 Turbo Quattro-Ate Front 90-91   HB135.700
> Audi 4000CS Quattro 86-87                      HB190.600
> Audi 4000CS Quattro 84-85                      HB190.600

First of all, my apologies for the error in brake pads identification. 
I hadn't actually looked at the G60 pads that I have at home, and was
taking it on faith that the HB135 was the G60 pad.  I stand corrected.
;-)

Secondly, I spent some time last night with the Dynalite caliper specs,
a G60 caliper and pad, and a set of measurement calipers.  I gathered
all of this wonderful data, but I'm not quite sure what to do with it. 
Anybody (perhaps those involved in the Big Red brakes conversation from
a while back?) care to take this info and translate it into a comparison
that I can understand?

* The G60 caliper is of two piston design with pistons of differing bore
sizes.  The bleeder side piston is 1.25" (32mm) internal bore, and the
piston furthest from the bleeder screw is 1.375" (35mm) internal bore.

* The Dynalite II caliper is of four piston design with all pistons
being the same bore size and is available with piston bores of either
1.38" (35mm) or 1.75" (44.5mm).  (Please note: I do _not_ know which
piston size RPI is selecting for their kit; I would assume the smaller
1.38" bore)

* The Dynalite pad is advertised as having 6.63 square inches of
friction material surface area  whereas (_very_) rough measurements of
the G60 pad show it as having ~8 square inches of friction material
surface area.

* The advertised weight for the Dynalite caliper is ~2.5 pounds.  Not
having anything more accurate than a bathroom scale handy, the G60
caliper is easily over 10 pounds (or darn close; that sucker's heavy!)
so there _might_ be a handling benefit in the shedding of 7-odd pounds
of unsprung weight at each of the front wheels.

* The Dynalite caliper is spec'ed as being suitable for 9" through 15"
rotor applications.  There may be opportunity for additional upgrade (in
rotor size) with the Dynalite caliper.

That's all the info that I was able to come up with at this point. 
Hopefully this weekend I will have an opportunity to speak with a friend
of mine who works at a race shop here in Portland, and discuss with him
the suitability of the Dynalite caliper for street use, need/schedule
for rebuilding them, and do a hands-on side by side comparison.

Thoughts, comments, suggestions, other?  

later,

Gary