Brake Pressure Regulator on Race Car Options

[jhynesrockmtn]

I am putting together a 4 cylinder vintage race car a friend who passed 5 years ago had started. I'm getting calipers from PMB, going with stock brakes for now. How many are running the stock brake pressure regulator in their race/track cars? Should I remove it and put in a proportioning valve?

[Krieger]

Under the advice of Mr Shea at PMB I am using it on my track car and it works great. I have the Alfa Romeo front calipers and Ferrari 308/ 914-6 gt rears. Remember this really isn't a proportioning valve. It is set up for panic situations to keep the rears from locking first. There are threads somewhere in this forum about this topic. I say leave it for now if you brakes are stock.

[stownsen914]

Correct that that it's not a true proportioning valve but rather a pressure limiting valve. In the stock '74 914 that I had years ago I could hear it actuating (when engine off) if I pressed hard on the brake pedal. It must be a spring loaded mechanism. Putting one of the racing type limiting valves like Chris recommended above will give you a firmer pedal, which is worth something for track use. You can also adjust it to limit the rear braking a little less which will improve braking performance for track use.