Krankvent install on stock s2000
01-30-2007, 12:44 PM
#41
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Vaccum in crankcase
Is the link.
These is less blowby when on the trottle. Vacuum is created by the motor sucking when the throttle plate is closed. When is your next oil check?
J
Is the link.
These is less blowby when on the trottle. Vacuum is created by the motor sucking when the throttle plate is closed. When is your next oil check?
J
01-30-2007, 10:44 PM
#42
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Thanks for the link 
In their case they are using a vacuum pump, that runs when the engine is running.
In "our" case the vacuum is created in the intake manifold and that is IMO not as constant as a pump.
Besides, with the extra one way valve to stop the flow through the crank case I don't think too much of the oil mist is sucked away.
Pressure difference creates flow, if both the crank case and intake manifold are at the same pressure there is little flow, just vacuum.
And.. "we" have the oil jet bolts, squirting oil up underneath the pistons and cylinder walls.
Well... I check 
my oil level after every gas fillup.
The next oil change and UOA will take another 12000 km / 3/4 year or more.
In their case they are using a vacuum pump, that runs when the engine is running.
In "our" case the vacuum is created in the intake manifold and that is IMO not as constant as a pump.
Besides, with the extra one way valve to stop the flow through the crank case I don't think too much of the oil mist is sucked away.
Pressure difference creates flow, if both the crank case and intake manifold are at the same pressure there is little flow, just vacuum.
And.. "we" have the oil jet bolts, squirting oil up underneath the pistons and cylinder walls.
When is your next oil check?
my oil level after every gas fillup.The next oil change and UOA will take another 12000 km / 3/4 year or more.
02-04-2007, 10:23 AM
#43
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I'd like to just post an update to my Krankvent install. Yesterday I drilled out my PCV valve, so now the old valve is free-flowing in both directions.
The squeak (as I'd call it) that I had before that modification, was an audible squeak at maybe 3-4 times per second. Now, since I drilled out the old PCV valve, it's changed to more of a whirring. But if listening closely it's almost as if the squeak is happening so fast that the sound waves adding together sound like a constant noise.
Just with some quick math I'd guess that at idle (where I'm listening for the noise) the crankshaft rotates 17 times per second (@ 1000 RPMs). So I'd surmise that because of the increase in vacuum pressure (by removing the slow-reacting PCV valve) is causing the sqeak to happen at a higher frequency.
The squeak (as I'd call it) that I had before that modification, was an audible squeak at maybe 3-4 times per second. Now, since I drilled out the old PCV valve, it's changed to more of a whirring. But if listening closely it's almost as if the squeak is happening so fast that the sound waves adding together sound like a constant noise.
Just with some quick math I'd guess that at idle (where I'm listening for the noise) the crankshaft rotates 17 times per second (@ 1000 RPMs). So I'd surmise that because of the increase in vacuum pressure (by removing the slow-reacting PCV valve) is causing the sqeak to happen at a higher frequency.
03-19-2007, 09:07 AM
#46
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And.. "we" have the oil jet bolts, squirting oil up underneath the pistons and cylinder walls.
If you have an AP1 and go FI I'd recomend getting AP2's to put in they squirt more in the center of the pistons. You can see the difference. Might have helped my engine from blowing up if I would have did this in the first place. But live and learn.
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