Proportioning valve advice

[Apogee]

First off, I would never recommend installing a proportioning valve in the front circuit on any pro-touring application...or really almost any application for that matter. You want predictable, linear behavior from the front brakes and your front brake requirements only go up as you stop at higher rates of deceleration and transfer more weight to the front of the vehicle.



Without the piston areas of the calipers you're running, I'm just guessing that Wilwood's recommendation was based on the assumption that your front brakes with your current setup will overpower the rear, so adding an adjustable proportioning valve to the rear circuit won't gain you anything because you'll achieve front lockup first, not rear, hence eliminating the need for the prop valve. Why they would suggest adding one to the front is beyond me and you would have to ask them about that.

You haven't said what you're working on, however by leaving any proportioning valve in the rear circuit, you're reducing the pressure to the rear brakes above the knee point which means that you're even further reducing their effectiveness and contribution to the system as a whole.

You could stagger your pad compounds and run a more aggressive compound in the rear to try and make up for the lack of piston area and rotor diameter, however that can be a little trickier than it sounds due to variations in pad coefficients of friction with temperature.

Kinda off topic, but what do you call a dual pro-street/pro-touring car? Pro-String? Pro-Tweeting?

Tobin
KORE3