Right Rear brake Overdusting

[Solid Red 98]

My 98 GTS had the usual crappy stock brakes, so after noticing the right rear dusting more than the others, I decided to take that as time to upgrade. I kept the stock calipers up front and used Wilwoods on the rear incorporating a front/rear proportioning valve. I like the upgrade, but I am still getting more dust on the rt rear than the others. What is up?

 

[Tom F&L GoR]

Can you describe the Wilwoods, particularly what is the parking brake now?

Do you have the stock suspension (no adjustable shocks or ride height change?)

PS The proportioning valve is really a pressure limiting valve and does not affect the front brakes at all. It only limits the maximum rear brake line pressure.

 

[Solid Red 98]

Can you describe the Wilwoods, particularly what is the parking brake now?

Do you have the stock suspension (no adjustable shocks or ride height change?)

PS The proportioning valve is really a pressure limiting valve and does not affect the front brakes at all. It only limits the maximum rear brake line pressure.

Right, I misprinted...meant to say rear p-valve. The Wilwoods are one of their 2 piston kits adapted to the Viper by Valaya Racing. The suspension is stock, the parking brake is the original caliper left in place for that purpose, and now that you mention that, this could be a duh moment for me. Could it be dragging a bit as just a park brake? I haven't noticed any heat or sound, but I must now investigate that as a possible cause for the current dust.

 

[Tom F&L GoR]

I can help with duh old calipers...

The obvious is if the pistons are not retracting and pads are slightly dragging. Use pliers or the piston tool to rotate the piston clockwise, pushing at the same time, to reseat the piston.

The less obvious is if the caliper is not floating and getting stuck on the slides. Sometimes the small rubber boot covering the end of the large attaching bolt gets abraded by brake pad debris. Once it has a hole in it, more pad debris and road dirt may contaminate the grease. You'll have to remove the pads and the rotor to inspect it. In any case, without the pads in place, the caliper body should move in towards the differential and outwards toward the wheel fairly easily - certainly by using only one hand.

Is there anything under the car that would affect air flow? Could the brake be working normally but the dust is more prone to blowing onto the wheel?

 

[Solid Red 98]

Since it is supposed to rain for the next few days, on jack stands it will go for inspection of the suggested items. Sometimes the obvious is invisible--its why its good to look twice before crossing the street. Thanks.