[DeTomaso] Pantera - Brakes

[thomas]

The problem is that the proportion is not constant.  It only reduces the pressure when pushing hard. So at light braking you are using too much in front.  It is really working quite the opposite of what is should do. It should move more braking power to the front the harder you brake, but in reality it removes power when you push hard. The prop valve should really only be used in the rear circuit.

Thomas

10 dec 2011 kl. 21:44 skrev Julian Kift <julian_kift at hotmail.com>:

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> How much does the proportioning valve proportion? I seem to recall hearing something around 70% to rear, which will have significant impact on brake pedal feel and the pressure required to get the fronts to lock up.
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> Maybe it's time to throw some science into the OEM theory and plug all the available stock data into one the available brake efficiency/sizing calculators.
> 
> Julian
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>> From: MikeLDrew at aol.com
>> Date: Fri, 9 Dec 2011 19:15:06 -0500
>> To: hoppe1 at cox.net; cengles at cox.net; rickrows at hotmail.com
>> CC: detomaso at realbig.com
>> Subject: Re: [DeTomaso] Pantera - Brakes
>> 
>> 
>> In a message dated 12/9/11 15 36 16, hoppe1 at cox.net writes:
>> 
>> 
>>> I know Mike thinks you should keep the front brake pressure reducer.
>>> I would throw it away and replace it with an adjustable proportioning 
>>> valve.
>>> I have driven a car without the stock pressure reducer and I thought the
>>> brakes were a lot better and agree the front will lock up first.
>>> But better is better and you don't have to push so hard to lock them up.
>>> Adding an adjustable proportioning valve to the front would be better then
>>> the old pressure reducer by allowing the adjustment.
>>> 
>> 
>>>>> I agree completely.
>> 
>> I wouldn't say it's accurate that I advocate keeping the stock valve, so 
>> much as I would say that I don't advocate removing it, without replacing it 
>> with something better.   Removing it entirely is a bad idea.   Leaving it in 
>> place is probably fine as long as it's functioning properly.   An adjustable 
>> valve is probably the optimal solution.
>> 
>> Mike
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