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Old 07-31-2021, 11:20 PM   #26
lookforjoe
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Did you confirm the pump draws sufficient vacuum? I don't recall the ratings, but it needs to be powerful. Many of those are actually weak. I tried a few versions quite some years back on my old (RIP) whiteblock & never found a setup that didn't actually cause a flow restriction.



Belt -driven vacuums pumps are the serious way to go. Obviously the cap vent will need to go if you are trying to pull a vacuum on the crankcase.
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Old 08-01-2021, 12:36 PM   #27
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I have not tested the vacuum capability yet. Once I do I will post the numbers. This is partially experimental since I haven't seen anyone go this in depth with their PCV setup on the forum. I have looked but nothing much more than just adding a catch can. I'm going to be testing everything thoroughly though.

I know there are benefits to pulling a high vacuum in the crankcase, but at this point I just don't want oil mist in my engine bay.

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Old 08-01-2021, 04:58 PM   #28
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I have read about PCV/catch can systems on Turbo LS engines causing air to enter at the rear main seal which caused a noise that was difficult to track down.
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Old 08-01-2021, 05:02 PM   #29
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You want to pull enough vacuum that it helps the engine stay ventilated and sealed. But not so much vacuum that you start pulling a lot of oil out of the engine. A good read is the stealthfti pbase page on how the pcv works. He talks about the speed of the vapors being key to having it work well. https://pbase.com/stealthfti/pcv
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Old 08-02-2021, 09:02 AM   #30
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I have not tested the vacuum capability yet. Once I do I will post the numbers. This is partially experimental since I haven't seen anyone go this in depth with their PCV setup on the forum.
no offense, but search noob! Guys were playing with air pumps several years ago. Nathan in Washington logged vacuum and everything.
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Old 08-02-2021, 01:37 PM   #31
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no offense, but search noob! Guys were playing with air pumps several years ago. Nathan in Washington logged vacuum and everything.
You're correct, I forgot about the thread with Nathinwa. Not really a noob over here though. Just busy and research gets tedious at times.

Here is the thread with the best information on the pump I'm using. I think page 7 or 8 had the measured numbers.

http://forums.turbobricks.com/showthread.php?t=256223
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Old 08-02-2021, 01:49 PM   #32
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You're correct, I forgot about the thread with Nathinwa. Not really a noob over here though. Just busy and research gets tedious at times.

Here is the thread with the best information on the pump I'm using. I think page 7 or 8 had the measured numbers.

http://forums.turbobricks.com/showthread.php?t=256223
just gotta make sure we're paying homage to the elders

I have the same pump on the shelf, just haven't played with it yet, so I'm interested to see how it goes for you
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