No vent in catch can

Definitely not vented or pressure-relieved.
Summit RacingĀ® Aluminum Overflow Tanks SUM-300100

It is now... 1/4" hole in the top! Simplest way to make it work :)


Why couldn't you put the hose at the bottom......which would act as a return "recovery" and leave the top "valve" open? With the hose at the top, don't you have to drain it every time it "pukes?"

SUM-300100_ml.jpg