We recommend still using the valley pan along with the composite gaskets to keep the oil off of the bottom of the intake, helps eliminate some leaks and just keep hot oil off the intake, want to keep the air cool right?
I agree with keeping the valley pan. However, if I did ditch it my air is still going to stay cool because I got an air gap!:bla:
Idealy I would not run a pvc period other than the fact that with the amount of blowby which even with supersealing rings is still present is there. The reason its even there is to recycle the oil fumes from the crankcase. Those oil fumes dont burn very well so I rather not even use one....hence the invention of header bungs to scavenge those gases to the exhaust system. The reason the valley pan is there is yes to keep the hot oil from the intake bottom and to keep the oil from an open pvc, If the heat bypass is blocked and water temp at +/- 200 and oil temp at +/-280 it doesnt compare to the manifold exhaust temps at +/- 500 , thus it keeps the oil from the hot crossover which would burn the oil and turn it to sludge making it ineffective. This all my belief and since the heat crossover is blocked and the manifold machined to match the heads i need to use composite gaskets and thus no need for the valley pan. http://www.summitracing.com/parts/MOR-25900/?image=large
The PCV is INCREDIBLY effective at reducing air pollution, and THAT is the reason it's in place. The PCV also increases oil life; and in the process reduces crankcase acid formation that would erode bearings and other internal components. Considering that the PCV is both extremely inexpensive, improves durability of the engine AND makes the vehicle more eco-friendly WITHOUT reducing performance or creating any meaningful service issues--a person would have to be nuts to NOT use one on any engine that is primarily run at part-throttle. True enough, the PCV system needs to be baffled/shielded so it does not pick up liquid oil or oil mist; and an engine that isn't run primarily at part throttle (race engines) won't benefit much if at all.
I agree...I do use a pvc but rather than run it to the carb...I run it through the exhaust and burn the fumes off that way. Yes it would be foolish to not run a pcv at all .
First Guess: the fumes aren't burning in the exhaust; and therefore the hydrocarbons are still a source of pollution. A quick test with a sniffer would tell the tale. Second Guess: You aren't providing enough vacuum at part-throttle with the system plumbed into the headers. Most header evacuation systems don't use a PCV valve, just exhaust check-valves to prevent pressurizing the crankcase when there's no vacuum in the exhaust at the fume entry point. More exhaust flow = stronger vacuum; so at part throttle and idle there's likely to be be very little vacuum--and therefore very little fume removal. A vacuum gauge connected to the PCV plumbing would verify the vacuum intensity. Overall--I don't understand why you're allergic to using manifold vacuum for the PCV system. Manifold vacuum works JUST FINE on millions and millions of vehicles.
