Drag car brake/proportioning question

demon322 said

Thanks for all the thoughtful replies guys!

So if I go with a proportioning valve can I eliminate that residual valve or should I run both? Is this type ok? That way it could mount under the car with the MC and the adjustment could be in the cab.

View attachment 1715508864

View attachment 1715508865

Click to expand...

That flap looks like it is just to seal the **** pit. Depending on who you talk to, a race car should have an adjustable pro portioning valve to decrease front braking or increase rear braking depending on how you look at it to offset the skinny and fat slicks that are common on race cars.
Stock pro portioning valves are for stock cars with four identical wheels. The last thing you want in a race car is to lock up those skinny front tires at 120+ mph imho.