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Kingtal0n · 04-09-2020, 01:43 PM

lets try this again

factory engines from all manufacturers of every engine in the world use PCV.

Factory wet sump engines use PCV to generate a BELOW atmospheric pressure drop inside the crankcase AT ALL TIMES. Including cruise, and WOT.

If you disable this feature by venting to the atmosphere, you no longer have a positive crankcase ventilation "PCV"

the main benefits of PCV are:
-Improved ring seal character & reduced blow-by
-Reduced hydrocarbon fragment contamination of engine oil and parts (the black sticky goo and hard diamond-like crust that forms on various surfaces)
-Lower pressure on oil retaining side(inside the crankcase) reduces the passage of engine oil through every seal (try putting a small leak of viscous fluid as water or oil in a sealed cup then applying a low pressure to the inside of the cup, the leak is reduced or entirely prevented) preserves oil seals and prevents leaks, high crankcase pressure is known to blow out seals i.e. front main, rear main, valve cover, dipstick, etc..

You throw all of that away when you vent to the atmosphere as you are doing
This atmospheric venting technique is employed on budget short term racing equipment, i.e. if you are wagering the entire vehicle in a pinks race, and just need max power for that one race, and you don't care about any of the parts in the car, you would do this sort of thing. It gives max power at the expense of reduced engine service life expectancy.

I've examined and cleaned around 1000 engines imported from Japan from say 2004 to 2012, and installed many into cars. Without launching into a dissertation suffice to say that engines where the owners had disabled their PCV functions were significantly worse, to the point where I stopped accepting engines with modified air filters and will only accept engines with intact air box, factory filter and pcv systems (no modifications) for swaps in any car (including local V8 engines sourced) to this day

PCV is often overlooked yet its part of the oil system and one of the most critical functions on an engine if you care about the engine

04-09-2020, 01:43 PM	#16
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 38 Posts: 4,649 Trader Rating: (17)	lets try this again factory engines from all manufacturers of every engine in the world use PCV. Factory wet sump engines use PCV to generate a BELOW atmospheric pressure drop inside the crankcase AT ALL TIMES. Including cruise, and WOT. If you disable this feature by venting to the atmosphere, you no longer have a positive crankcase ventilation "PCV" the main benefits of PCV are: -Improved ring seal character & reduced blow-by -Reduced hydrocarbon fragment contamination of engine oil and parts (the black sticky goo and hard diamond-like crust that forms on various surfaces) -Lower pressure on oil retaining side(inside the crankcase) reduces the passage of engine oil through every seal (try putting a small leak of viscous fluid as water or oil in a sealed cup then applying a low pressure to the inside of the cup, the leak is reduced or entirely prevented) preserves oil seals and prevents leaks, high crankcase pressure is known to blow out seals i.e. front main, rear main, valve cover, dipstick, etc.. You throw all of that away when you vent to the atmosphere as you are doing This atmospheric venting technique is employed on budget short term racing equipment, i.e. if you are wagering the entire vehicle in a pinks race, and just need max power for that one race, and you don't care about any of the parts in the car, you would do this sort of thing. It gives max power at the expense of reduced engine service life expectancy. I've examined and cleaned around 1000 engines imported from Japan from say 2004 to 2012, and installed many into cars. Without launching into a dissertation suffice to say that engines where the owners had disabled their PCV functions were significantly worse, to the point where I stopped accepting engines with modified air filters and will only accept engines with intact air box, factory filter and pcv systems (no modifications) for swaps in any car (including local V8 engines sourced) to this day PCV is often overlooked yet its part of the oil system and one of the most critical functions on an engine if you care about the engine Last edited by Kingtal0n; 04-09-2020 at 02:14 PM..