|
|
|
|
| Author |
|
|
Registered
Join Date: Oct 2002
Location: SE PA
Posts: 3,188
|
Rear calipers: metal slugs in pistons?
I pulled the pads out of a set of early Brembo 2-pots and out fell the two metal cylinders you see here. What are they there for?
|
||
11-09-2004, 05:50 AM
|
|
|
Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,957
|
Jon,
Assume that the pistons are still in the calipers? Thats very interesting... JoeA
__________________
2021 Subaru Legacy, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
||
|
11-09-2004, 06:02 AM
|
|
|
Registered
Join Date: Oct 2002
Location: SE PA
Posts: 3,188
|
Yes--the piston are the same outward-facing cup shape as on most calipers. The slugs were loose inside the cups. I was guessing maybe they were there for some sort of damping effect to prevent squeeling?
|
||
|
11-09-2004, 06:04 AM
|
|
|
Registered
Join Date: Oct 2002
Location: SE PA
Posts: 3,188
|
PET confirms--"vibration damper"
So the next question is: what makes these calipers so susceptible to vibration that they need such a kludgy solution? I have nearly identical (but 14 years newer) calipers on the back of my Subaru. I'll have to check and see if they have the slugs. |
||
|
11-09-2004, 06:51 AM
|
|
|
Moderator
|
It's not really a damper but more of an adaptor so that the small spyders(the real dampers) can snap into the pistons w/o a redesign. These were an after thought on that caliper.
This is a set of 4 dampers for 1 4 piston caliper, the flat face is bonded to the back of the pad, the spyder snaps into the piston. 
__________________
Bill Verburg '76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone) | Pelican Home |Rennlist Wheels |Rennlist Brakes | |
||
|
11-09-2004, 12:52 PM
|
|
|
Registered
Join Date: Oct 2002
Location: SE PA
Posts: 3,188
|
Quote:
 Anyway--good to know. Thanks. |
||
|
11-10-2004, 06:20 AM
|
|
|
|
Registered
Join Date: Sep 2003
Location: Ann Arbor, MI
Posts: 778
|
You would be frightened to know about the amount of added vehicle mass happening in auto engineering - esp as it relates to dampers.
99% of dampers are after-thoughts or band-aid fixes.
__________________
Project935 Tube Chassis Turbo RSR/934/935 racer - SOLD in 6/'06 Gruppe B #101 What's next? |
||
|
11-10-2004, 06:47 AM
|
|
|
Moderator
|
I think it was cost benefit thing, they knew that those calipers were only a short term solution so didn't waste anything on doing them right.
By the way the spiders aren't really necessary, I use them if they are free, but only on a street car. Never on a track car.
__________________
Bill Verburg '76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone) | Pelican Home |Rennlist Wheels |Rennlist Brakes | |
||
|
11-10-2004, 11:36 AM
|
|
1976 Porsche Carrera 3.0
1995 Porsche 993 Carrera Coupe
