PCV and MAF on turbo build?
12-22-2016, 11:39 AM
#12
12-24-2016, 03:21 PM
#13
I have a breather filter for the fresh air inlet on the drivers valve cover, a line from the pcv can to the manifold and a line from the barbedroom fitting on the can to the passenger valve cover. No problems at all. Catches plenty and I have no issues tuning with maf
12-24-2016, 04:45 PM
#14
would be interested to see some pics hows you guys have the catch can routed on your nnbs's.
I had a catch can, but i had a bit of idle flutter, so i removed, but i would love to put it back on there.
I had a catch can, but i had a bit of idle flutter, so i removed, but i would love to put it back on there.
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BoostinJonnyukon (02-26-2017)
12-24-2016, 04:57 PM
#16
Thank you for the picture!
12-25-2016, 10:08 AM
#18
Where street trucks spend most of their time.
Moving dirty air from the crankcase through the combustion cycle.
Having a slight vacuum on the crankcase also helps ring sealing.
Other wise you are relying on the blow by from the combustion cycle to push
those vapors out the valve covers all the time.
And this cause oily smell inside the cab.
To each his own but these are just a few reasons.
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BoostinJonnyukon (02-26-2017)
12-28-2016, 01:14 AM
#19
To pull the crank case vapors out under normal cruising.
Where street trucks spend most of their time.
Moving dirty air from the crankcase through the combustion cycle.
Having a slight vacuum on the crankcase also helps ring sealing.
Other wise you are relying on the blow by from the combustion cycle to push
those vapors out the valve covers all the time.
And this cause oily smell inside the cab.
To each his own but these are just a few reasons.
Where street trucks spend most of their time.
Moving dirty air from the crankcase through the combustion cycle.
Having a slight vacuum on the crankcase also helps ring sealing.
Other wise you are relying on the blow by from the combustion cycle to push
those vapors out the valve covers all the time.
And this cause oily smell inside the cab.
To each his own but these are just a few reasons.
The only other pro you cite is that crank case vacuum promotes better ring seal. Sure it does, if you actually are producing a decent amount of vacuum. I don't believe I have ever seen a pcv set up with the volume capability (small lines and check valves) or efficiency to be able to that.......and if it is.....well see the paragraph above because now you are really sucking up some bad ****.
There are plenty of ways to do what you want, but a pcv system plumbed back into the intake is the worst way to attempt it. If you are that worried about it, a header/exhaust evac will do what you want, and keep everything clean. Otherwise you will need an actual vacuum pump/dry sump oil system which is normally not economical on newer vehicles. Even if you had to run the vent lines to the rear of the car (to prevent the mess/smell you don't want) it would be better than sacrificing your engine.
The pcv system was one of those epa/gov't funded programs that remind me of the dpf situation with diesels, though not quite as bad. In an effort to reduce emissions, the epa said yeah, lets burn more fuel and decrease mileage to prevent a little black smoke. Along with that, the dpf system implemented can be a very costly item to repair....so that along with the fact that mileage got decimated doesn't save anything. All of the sudden, we need a new ULSD fuel that complicates the refining process as well....you get the point.
The pcv system has no business on anything I own.
12-28-2016, 01:19 AM
#20
To pull the crank case vapors out under normal cruising.
Where street trucks spend most of their time.
Moving dirty air from the crankcase through the combustion cycle.
Having a slight vacuum on the crankcase also helps ring sealing.
Other wise you are relying on the blow by from the combustion cycle to push
those vapors out the valve covers all the time.
And this cause oily smell inside the cab.
To each his own but these are just a few reasons.
Where street trucks spend most of their time.
Moving dirty air from the crankcase through the combustion cycle.
Having a slight vacuum on the crankcase also helps ring sealing.
Other wise you are relying on the blow by from the combustion cycle to push
those vapors out the valve covers all the time.
And this cause oily smell inside the cab.
To each his own but these are just a few reasons.