todahead

Try to give a search but most topics are confused by the forced induction guys comments...

From an old test was posted on found that with the pcv valve in place trough the small valve cover port air moves in at low speeds/rpm and out the engine at high load contitions but what happens when deleting the pcv completely?

Also at what HP the stock pcv and it's lines become a restriction ?

Will a vented valve cover and a PCV delete set up help with reliability and performance on a all motor engine ?

Or it will mess things up with oil sludge or possible vaccumn leaks ?


thanks in advance.

ChrisCoupe1

I'm assuming your you mean letting both the crank case breather box "little black box" on the back side of the blocks and the actual vent on the valve cover. The reason it is "recycled" into the intake and not to atmosphere is just for emissions and partially for engine bay cleanliness. If you were to just unplug the pcv from the intake it's no longer venting under vacuum but rather it's own mechanical pressure which weather through a little breather filter or not will leave a slight oil mist in the engine compartment around the filter/exit point...this is why catch cans are nice they minimize the engine bay from getting dirty/oily and keep that it from dirtying the throttle body, intake manifold valves and combustion chamber....some like to argue it was designed that way to keep the valves lubricated but actually gasoline does a fine job of that....e85 not so much. ultimately if your building an engine for high performance of any kind you don't want additional contaminates entering your combustion chamber. For street cars it's generally negligible unless you don't like the idea of a small portion of oil burning in your engine...I did skip the whole part that blow by gasses play in this but again this is all emissions related

todahead

since a lot of guys have deleted the pcv and are venting both engine block and valvecover
have anyone experienced engine oil sludge problems after a decent amount of time/miles ?