Thread:

intake manifold pop off vlv

I'm installing a BDS medimun size pop off valve on a BBC manifold. I can't find the port size/area that I should make in the manifold. Running a 509 ci, 871 with about 10 # boost.Any ideas?

Hello, usually if you need to run one on a marine application, the gasket is the template. We usually remove them as often as possible as when they backfire, the air/fuel mixture bursts into the bilge or hot engine causing a fire. If you need to run one , use the gasket as the template. Thanks