Valve Cover PCV I.D. size

[Department Of Boost]

I need the I.D. of the OEM “PCV” valve that is located in the drivers side valve cover. I don’t have any valve covers I can tear up and I must have pitched the last PVC I gutted.

Anyone have a accurate measurement on the I.D. of that sucker? I need to restrict the line I have running to the vacuum port on my blower. Right now it’s a -6AN and pulling WAY too much air. I figured making a restrictor the same size as the OEM PVC which was working for me before I gutted my valve cover and switched the nipple on the valve cover to a -10AN wouldn’t be a bad ideer for starters.

I’m pulling so much crankcase vacuum that it’s pulling air into the motor past the valve cover gaskets//orings!

Thanks!

 

[dysan]

I'm just curious as to why you're pulling so much vacuum? On decel I'm pulling upwards of -11.5psi which would be about -22 in/Hg without any problems. This is breathing both valve covers and now my driver's side has no pcv valve in it. I've got a -10AN hose clamped onto the quick connect factory fitting on the driver's side cover going to a breather catch can and for now a cheap filter on the stem coming out of the passenger side cover.

 

[05stroker]

Here is a pic.