Which Brake proportional valve is needed

deoxford · 08-05-2009, 01:29 PM

I just put the 993TT big brake on the 964 with 993 NB on the rears.
What valve do I need to change to ? I have to much up front right now.

Bill Verburg · Bill Verburg's Garage

When Porsche installed that set up on 3.6t they used a 60bar p/v, i'd try it w/ none then install that or an adjustable Tilton. none will probably work fine for you.

kurquhart · 08-06-2009, 07:41 AM

Street or track? If the latter, you can also change the bias using different pad compounds. I have the turbo p/v, Pagid Yellow front and Black rear; works well for me.

deoxford · 08-06-2009, 07:35 PM

Track ,
Bill Thanks how do you go with none?
Do you drill it out or remove it ?Do you have some info on that?

Bill Verburg · Bill Verburg's Garage

Quote:

Originally Posted by deoxford

Track ,
Bill Thanks how do you go with none?
Do you drill it out or remove it ?Do you have some info on that?

the 964 Cup cars used a brake line #964.355.315.70 which afaik is nla. You can disassemble the existing p/v and remove the guts or I believe many just stretch the existing lines into place.

deoxford · 08-11-2009, 06:03 AM

Bill,
Do you have a pic of the valve and a picture of where it is on the car.
I think I know , but I want to make sure .

Bill Verburg · Bill Verburg's Garage

Quote:

Originally Posted by deoxford

Bill,
Do you have a pic of the valve and a picture of where it is on the car.
I think I know , but I want to make sure .

here's one from a C4, C2 should look similar.

On 993 they are on the output from the abs pump, but on 964 they are in the lines
here's a C4 in situ