10.1" Braking question.

["Randy B" <scirokn81@email.msn.com>]

Mark,
Thanks for the earlier info, sounds like you understand this
braking thing pretty well. Here is another question for you.
I took off the 10.1's from my Cosmos autocrosser discussed
earlier and put them on my Mars daily driver. I am now
running the 10.1's with the original MS and BB. After bleeding
the brakes correctly I took the car out for a test drive and
noticed that the pedal travels further to the floor before the
grabbing begins than it did with the 9.4's. At first this bothered
me a little but after a few fast stops I noticed that it will definitely
outbrake the earlier setup and I can easily and controllably lock
up the fronts, but heel-toe is out of the question without launching
the motor. I think that the 10.1 calipers probably hold more fluid
and that may be why the pedal travels further, but the car will
stop on a dime with about the same pedal pressure before and
is very linear. My question is whether or not the larger MS will
give me back my shorter pedal travel and if so are there more
than two types of OEM MS's that were available for the earlier
VW's and which one you would recommend for the solution to
the above inconvenience. I am assuming that I dont want the
larger BB because the pedal pressure is fine and I would like
to stay away from the exponential stopping power I felt in the
Cosmos car with it's setup.
Any advise would be greatly appreciated.
Happy New Year.

Randy B.
Cosmos 81 Scirocco S - 2.0L 16V (soon to be)
Mars 81 Scirocco S - t t 1847cc


-----Original Message-----
From: Mark Christiansen (EM precision) <roccet@pacifier.com>
To: Randy B <scirokn81@email.msn.com>
Date: Sunday, December 26, 1999 5:13 PM
Subject: Re: 10.1" Braking question.


>
>
>
>>Hi there Mark,
>>RE: Scirocco list
>>>some one earlier emailed about weakend rotors by  slotting etc.. yes this
>>is
>>>true but i have never had a problem with any of my rotors..
>>
>>After 2 autocross sessions and the spirited drives back and forth to the
>>events, my first set of crossdrilled rotors warped. I have since replaced
>>with the same brand (Power Stop by Autospecialties) and ran them 4
>>more events and over 3K on the street and no problems. (probably mfg
>>defect?).
>
>warping alot of things could happen from defect to pads of that particular
>batch to the conditions of the weather etc.. etc.
>>
>>I am using Repco metal-master pads, later master cylinder, booster, and
>>pedal assembly from an 8V 84 Scirocco. Is there a difference between this
>>setup and the 16V Scirocco parts.
>
>yes for sure the 8v booster is not as agreesive..
>
>
>>in
>>front of me just stopped at 70mph and when I put my foot down on the
>>brakes, the fronts locked up for a second and after letting off slightly I
>>Do you think this is attributed to the larger swept area, extra cooling,
>
>yes thats what i was explaining previously.. less pressures and cooler
>rotors working less and braking more.
>
>
>
>>>...and very very very few times do i ever lock up my rotors...
>>
>>What is your secret? Is it just driver skill
>
>
>skill of course plays a role but you become skilled by how you want your
>brakes set up you can adjust the brake pressures you want by
>aftermarket adjustment valves etc..
>>
>>Thanks for your time Mark, any help would be appreciated.
>
>no problem if there is anything i can do . just ask..
>
>Mark
>EMsport/EMprecision
>
>




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