Maybe, Maybe not.
My experience..... I ran dual breathers on my 340. It always seeped oil out the breathers. The 416 I am going to build will be getting an evacuation kit to the headers. This way I can use the exhaust scavenging like a pcv system.
but if you run a full exhaust with mufflers you create back pressure back into the engine.
I abstain from this discussion as my answer will only serve to cause great argument.
but if you run a full exhaust with mufflers you create back pressure back into the engine.
http://mewagner.com/?page_id=444There is a new aftermarket PCV valve that is expensive but adjustable. I can't recall the name but I'd bet if you google PCV valves it will come up. It is the only adjustable PCV valve I know of.
What? Who told you that? Let's see the significant numbers, as they pertain to a PCV or EVACS .
OP
I ran two evacs on the street, but found that they work really, really, well. So well that even just one wanted to empty my oilpan through the valve cover. Even after reengineering my baffles, it still pulled enough oil under certain conditions to leave a cloud of oil behind me.I imagined a system to get around that, but,in the end I went withe PCV instead. As an aside, a PCV provides a good amount of idle-air-bypass, to help set up the T-port sync-up.I wish the carb people would engineer a nice adjustable idle-air-bypass circuit.I think it would help solve a lot of problems for newbes.
We had similar issues (without the dieseling) with a stock 60's vintage SBM PCV and a 268-ish cam from Crane. I could tell from listening that the PCV was pulling too much air at idle. We even tired an NOS one; same results. Too much idle air would cause your symptoms.I put a stock type PCV on my 360 with a XE268H cam and my idle went up and I couldn't get it down. Also, when I would turn it off it would diesel really bad.
I even backed the idle speed adjustment screw on my Holley 750 DP all the way out so that the throttle blades are all the way closed. No luck there either.
I played with 4 corner idle adjustment screws and that helped, but then couldn't start the car when cold.
So, I took the PCV valve off and plugged the port on the Holley. Maybe I just need a different PCV valve or something.
I have a breather installed on each valve cover and I have been questioned about not having a PVC valve on my 416 stroker build? Am I OK with the two breathers and no PVC valve???
I ran two evacs on the street, but found that they work really, really, well. So well that even just one wanted to empty my oilpan through the valve cover. Even after reengineering my baffles, it still pulled enough oil under certain conditions to leave a cloud of oil behind me.I imagined a system to get around that, but,in the end I went withe PCV instead.