750HP, we expect my 4 stage DS is sucking up to 20 of mercury at full melt which is alot! We reckon its sucked in part of a manifold gasket. With the BIG heads the manifold gasket with those poxy steel wedges is a joke...
We are going to run exactly what you have proposed (CC Vent set to 12 of Merc) and set it to 12" of Merc Vacuum so once the vacuum exceeds that it can suck in some atmosphere and reduce the chances of sucking in gaskets and will ultimately help increase piston ring seal. Current leak down tests are BAD!
My question still remains though.....Do the NASCAR RACE Guys have a set crankshaft vents to suck in some atmosphere after reaching a certain point.
The vents don't release air into the atmo they only allow atmo into the engine so I assume if they do that they don't run the vent inside an externally mounted catch can arrangement to avoid
oil spew etc.
I've read up a bit on the net and many seem to get mixed up between PCV and Crankcase Vents.... Entirely different animals!
I'd love a pic of a NASCAR RACE ENGINE with a crankcase vent set up shown if anyone has one!
SpookyPT