Like many others, I have tried to run a PCV valve, only to go back to the road draft tube.
I tapped into the top of the draft tube installed grommet and PCV valve, ran a 3/8" hard line around to the the stock intake. Used short sections of 3/8 tube to tie it together. Had to sleeve down the rubber tubing to tie in with the 1/8 NPT fitting on the manifold. Plugged the lower end of draft tube and used a vented cap on the valve cover. It seemed like there just wasn't enough volume of air (vacuum) through the intake fitting.
Has anyone drilled and tapped out the 1/8"NPT intake fitting to 3/8 NPT? Does this sound like a viable way to get increased volume of vacuum to the pcv valve?
I'm starting out with a freshly rebuilt 235 and would like to upgrade and close the venting system. I sure would appreciate any input you might have. Thanks in advance.
