Breather VTA-Block off PCV or not ?
19 April 2007, 12:06 AM
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Breather VTA-Block off PCV or not ?
Im going to vent all 3 of my breathers using 3 seperate pipes-2 for each of the cam breathers and 1 for the crankcase breather.
My original plan was to block off the PCV valve but I cant make my mind up whether this is a good or bad thing !!
Anyone got any ideas ?
My original plan was to block off the PCV valve but I cant make my mind up whether this is a good or bad thing !!
Anyone got any ideas ?
19 April 2007, 01:00 PM
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Blocked my PCV, and ran two hoses, 0ne 19mm (iirc) from block and one 17mm (iirc) from branched rocker covers down under finishing just above/behind rear axle, ie VTA..
Been like it 18 months no problems..
Been like it 18 months no problems..
20 April 2007, 10:31 PM
#3
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I've got a 'green' system that fully recirculates back into the inlet as intended, my catch tank simply intercepts the crankcase breather-to-inlet pipe line.
I tried it with the PCV blocked and found the tank and the pipes were getting absolutely filthy and filled really quick. Reconnected the PCV line and it performance was identical, but much cleaner because it was collecting the oil only when on boost, when it actually matters. IMHO disconnecting the PCV is pointless as it just means that when you're off boost your crankcase has no decent vacuum. It basically then saves all that filth up for when you do put your foot down, meaning your catch tank has to do loads more work.
I tried it with the PCV blocked and found the tank and the pipes were getting absolutely filthy and filled really quick. Reconnected the PCV line and it performance was identical, but much cleaner because it was collecting the oil only when on boost, when it actually matters. IMHO disconnecting the PCV is pointless as it just means that when you're off boost your crankcase has no decent vacuum. It basically then saves all that filth up for when you do put your foot down, meaning your catch tank has to do loads more work.
20 April 2007, 10:51 PM
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I've got a 'green' system that fully recirculates back into the inlet as intended, my catch tank simply intercepts the crankcase breather-to-inlet pipe line.
I tried it with the PCV blocked and found the tank and the pipes were getting absolutely filthy and filled really quick. Reconnected the PCV line and it performance was identical, but much cleaner because it was collecting the oil only when on boost, when it actually matters. IMHO disconnecting the PCV is pointless as it just means that when you're off boost your crankcase has no decent vacuum. It basically then saves all that filth up for when you do put your foot down, meaning your catch tank has to do loads more work.
I tried it with the PCV blocked and found the tank and the pipes were getting absolutely filthy and filled really quick. Reconnected the PCV line and it performance was identical, but much cleaner because it was collecting the oil only when on boost, when it actually matters. IMHO disconnecting the PCV is pointless as it just means that when you're off boost your crankcase has no decent vacuum. It basically then saves all that filth up for when you do put your foot down, meaning your catch tank has to do loads more work.
21 April 2007, 06:54 AM
#5
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1.4 bar. On my green system my catch tank is regularly collecting oil sludge, return pipe to the inlet is clean as a whistle, not a spot of oil anywhere in the inlet tract at all.
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