Oil catch can vs PCV Valve 12572717 ?
03-05-2008, 08:37 AM
#61
Team Owner
Smart move. 
03-05-2008, 03:03 PM
#62
Race Director
Howie might be able to give you a good deal. For comparison purposes, a new extended length aluminum housing runs $65 + shipping.
Lonestar, that avatar is hilarious!
Dave
03-05-2008, 03:10 PM
#63
Team Owner
06-20-2008, 08:55 AM
#64
Tech Contributor
Looking for Long Term Results
One person had this result: but only 4 ml of oil after 556 miles (0.01 ml/mile) with the fixed orifice vs. about 3 ml in only 100 (0.03 ml/mile)miles on the stock PCV valve.
So the the bottom line is that the fixed orifice PCV valve reduced oil consumption to 1/3 of the stock PCV valve in only 1/5 of mileage (this would equate to a 1/15 decrease).
So the the bottom line is that the fixed orifice PCV valve reduced oil consumption to 1/3 of the stock PCV valve in only 1/5 of mileage (this would equate to a 1/15 decrease).
Can anyone,using a fixed orifice PCV valve,post their long term trapped oil results?
02-02-2009, 10:30 PM
#66
Yes... I know this thread is ancient, but it's perfect timing for updating the LONG TERM RESULTS. 
Did anyone actually keep up with their results... did everyone decide the pcv valve didn't make that much of a difference? How about the coalescing filters over a regular catch can? I believe I'm in the market for a catch can and was researching old posts and this one interested me. Thanks for any updates..... or just let it die again if there's no new info or data. 
Did anyone actually keep up with their results... did everyone decide the pcv valve didn't make that much of a difference? How about the coalescing filters over a regular catch can? I believe I'm in the market for a catch can and was researching old posts and this one interested me. Thanks for any updates..... or just let it die again if there's no new info or data.
02-03-2009, 10:09 AM
#67
Race Director
Here's what I've learned over the last year or two:
1. Currently, nothing traps all airborn oil for a couple of reasons...
a) Vacuum pressure is both inconsistent and not high enough to allow a high-density filter to take advantage of sufficient oil molecule impaction. In other words, in order for a coalescing filter to be consistently effective, vacuum pressure needs to be as well.
b) Most "catch cans" are mounted too close to the heat source (the engine) and the disparity between blowby gas and filter element/can temperatures is not great enough to allow the greatest condensation/coalescence to occur.
2. The filter elements used in traditional catch cans will not clog easily but they will not filter effectively, either. Right now, everything is a tradeoff. I personally use a particulate filter that is mounted away from the engine. A fluid dispersion disc propels blowby gasses and included oil against a cooler "can". The air is then filtered through an element that is fairly free-flowing (20 micron), so vacuum drop is minimal.
3. I am always researching better ways to do this; hopefully, I'll have more info within the next couple of months.
Dave
1. Currently, nothing traps all airborn oil for a couple of reasons...
a) Vacuum pressure is both inconsistent and not high enough to allow a high-density filter to take advantage of sufficient oil molecule impaction. In other words, in order for a coalescing filter to be consistently effective, vacuum pressure needs to be as well.
b) Most "catch cans" are mounted too close to the heat source (the engine) and the disparity between blowby gas and filter element/can temperatures is not great enough to allow the greatest condensation/coalescence to occur.
2. The filter elements used in traditional catch cans will not clog easily but they will not filter effectively, either. Right now, everything is a tradeoff. I personally use a particulate filter that is mounted away from the engine. A fluid dispersion disc propels blowby gasses and included oil against a cooler "can". The air is then filtered through an element that is fairly free-flowing (20 micron), so vacuum drop is minimal.
3. I am always researching better ways to do this; hopefully, I'll have more info within the next couple of months.
Dave
02-09-2009, 12:00 PM
#69
Tech Contributor
Thanks to Dave68 and olftboy. 
There's still much to be learned from long term results. I'd like to see this thread stay open for that reason.
There's still much to be learned from long term results. I'd like to see this thread stay open for that reason.
