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Re: brake fluid anyone?
if you are running Metalmasters and OE pads at a tracke event, my feeling is
that this is a prime cause of your problem. These pads transfer all the heat
the fluid, causing it to boil. Try running a set of Cool Carbons on the car.
Up until this year, I was running a Turbo-Look Porsche Carrera at about 4-7
track events a year since '92. The factory pads would not hold up; the
pedal got spongy quickly and the pads looked like they had overheated
pads cracked and chunks out of them). Switched to Cool Carbons, could
run a whole weekend without any trouble (also installed a brake cooling
ductwork kit for the front brakes). After about three years, a local Porsche
expert recommended the Pagid Yellow compound. Well, I ran them for
2 track sessions, and the spongy pedal returned (thought at first I hadn't
bled the brakes right). I switched back to Cool Carboons and the nice
firm pedal returned.
Above was run with Castrol LMA, for info. I am now running a 993, and have
tried both the LMA and ATE Super Blue; the ATE held up better under track
Ray Calvo (firstname.lastname@example.org)
1990 Coupe Quattro
In a message dated 96-09-20 08:00:47 EDT, you write:
From: a6561TB@gnn.com ()
Date: Fri, 20 Sep 1996 01:40:09
Subject: Re: brake fluid anyone?
>What brake pads were you using? Are you sure that it was fluid boil that
>you were experiencing? I've been running ATE Super blue (BTW That's BMW
>OE Fill...... It's just not blue for them)for a long time and I have
>never had the experience that you have described.
Day 1. Went through a set of Metal Masters
Day 2. Went through 1/2 set of OEM's
I do destinguish between the fluid fade and the pad fade. I had both.
The brakes "slipped" so to speak, requiring an increased effort on the pedal
- - that can be attributed to the pad fade.
The pedal itself had increased its free travel by good 15-20mm - that's
fluid fade. It only occured after a coule of laps with some agressive
cornering and went away after the cool down. I did bleed the brakes once a
day with a pressure bleeder - air in the lines was never present. It's gotta
be the fluid boil!
BTW, I have teflon lined stainless steel braded brake hoses in all four
corners. Therefore I can't attribute the fade to the radial expansion of the
brake hoses either.
'89 200TQ, chipped and MOMO'd through out,
in Tornado "arrest-me-officer" Red;
'88 Fox, "the FOX machine";
ex '85 5000s, "the EE's nightmare"
Phila PA, USA