[DeTomaso] Chasing the Pantera Braking Solution (Was Proportioning Valve)

[Pantdino]

I don't know if it's relevant, but I don't think pressure bleeding would empty the air out of a pocket above the bleed nipple. 
What pressure / psi do the bleed machines use, anyway? Does anyone know?

Jim



-----Original Message-----
From: Mike Thomas <mbefthomas at comcast.net>
To: 'Pantdino' <pantdino at aol.com>; detomaso <detomaso at realbig.com>
Sent: Sat, Dec 10, 2011 10:30 pm
Subject: RE: [DeTomaso] Chasing the Pantera Braking Solution (Was Proportioning Valve)


Thanks, Jim.  No, the pedal moves normally.  Also, I've had my brakes pressure bled at Les Schwab tires.  The $50 is worth it.
Mike


From: Pantdino [mailto:pantdino at aol.com] 
Sent: Saturday, December 10, 2011 5:25 PM
To: mbefthomas at comcast.net; detomaso at realbig.com
Subject: Re: [DeTomaso] Chasing the Pantera Braking Solution (Was Proportioning Valve)



A bad booster usually gives a very hard pedal that you cannot push down.
Is that what your pedal is like?
 
It IS possible that your tires are just so sticky the stock brake system cannot lock them.
Remember, the stock brakes were designed for much narrower tires with a less grippy compound than you are running.
 
Do you have a G-tech or any other way of measuring your actual stopping rate?
 
Do you have the stock front calipers?  I had the Hall-modified stocks and had to unbolt it from the stub axle and hold it at different angles while my wife pumped the pedal to get all the air out of the top portion because the bleed valve is lower than the top of the cavity inside
 
Jim
 
 



 
-----Original Message-----
From: Mike Thomas <mbefthomas at comcast.net>
To: detomaso <detomaso at realbig.com>
Sent: Sat, Dec 10, 2011 10:43 am
Subject: [DeTomaso] Chasing the Pantera Braking Solution (Was Proportioning Valve)


I've done just about everything to my stock system that everybody here has
dvised:
Rebuilt calipers
orterfield pads
raided steel lines
ew master cylinder
eplaced the flexible vacuum lines both front/rear
ull pressure bleed at Les Schwab tires
lus SSBC vented/slotted front rotors, and I'm running 245 front and 315
ear section tires, Khumo Exsta XS, which are quite sticky.
What I don't know:
hether the booster has ever been rebuilt (rather doubt it)
hether the proportioning valve has been molested
When I brake, it's still all I can do to get anything to lock up, and when I
et lock, it's always the right front only.  I don't track the car, but even
n spirited twisty drives, the few times I've had to clamp down hard have
eft me looking for an anchor to throw out the window to get it to really
TOP.
Questions:
hat's involved in rebuilding the booster, and should I consider replacing
he proportioning valve?  I feel like I should pull it to at least see if it
as been tinkered.
Thanks
ike Thomas
ellow '74 L #6328
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