Confirmed: Turbo Inlet Pipes can Break our PCV Systems

Описание: This video is about some instrumented testing I've done to discover why peoples' luck with VW MK7 OEM PCV systems seems to be so hit or miss. It turns out the thing that everyone thought was "just a tube" is vital to the factory PCV system working correctly. It rarely shows as an issue when street driving, but for any track rats this might be vital information. The TIP vacuum source will also influence how well a PCV plate system can work as well, so regardless of what setup you have, this video is worth the time.

All data shared in this video is available on the website at the link below:
https://www.datadrivenmqb.com/just-th...

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UPDATE: Check out the BMS TIP with vs without Venturi when data logged on track:
   • Track Tested: MK8 Basic vs Full Retrofit w...  

MK7 vs MK8 PCV and how it works:    • MK7 PCV Analysis - How it works, and why I...  

MK8 Full Retrofit parts that I used:
06K-103-210-D (PCV hose) https://vw.oempartsonline.com/oem-par...
06Q-103-495-B (PCV valve) https://vw.oempartsonline.com/oem-par...
06M-906-094 (bung, looks like price has gone up about $10 since I last purchased) https://vw.oempartsonline.com/oem-par...
++ 034 Turbo muffler delete: https://itsnotstock.com/034motorsport...
++ 90 degree 1/8npt to 3/8 barb fitting: https://www.amazon.com/gp/product/B09...
NOTE: 1/8npt to 5/16 barb may fit better/be easier to install, though 3/8 is what I originally used: https://www.amazon.com/NPT-16-Hose-Ba...
++ 1/8npt extensions: https://www.amazon.com/gp/product/B0B...

NOTE: If Basic Retrofit is done, then you will not need the items marked with "++", but will require a 3/8 rubber cap to remove the top Venturi hose and plug the port. See the video below for details:

MK7 to MK8 PCV Retrofit:    • MK7 to MK8 PCV Install How-To, and Amazon/...  
Full retrofit install specifics:    • MK8 PCV Venturi (Full Retrofit) Installati...  

NOTE: If you have a turbo that does NOT use a turbo muffler adapter or one that uses a stock size charge pipe, you will need to tap for pressure somewhere between the turbo OUTLET and the THROTTLE BODY. Some charge pipes may have a 1/8npt fitting intended for water/meth injection, or you can possibly use:
Mishimoto 1/8" hose/coupler tap: https://www.mishimoto.com/aluminum-1-...
Have a bung welded to your charge pipe if it is aluminum
If your charge pipe is thick enough, just plain tapping for a 1/8npt fitting (and using some sealant) should work as well. Verify it's not leaking!

Prior related content:
   • MK7 PCV Analysis - How it works, and why I...  
   • MK7 PCV Analysis: MK8 PCV + Using the Vent...  
   • MK8 PCV Venturi (Full Retrofit) Installati...  
   • MK8 PCV Retrofit UPDATES (Pt 10): User Fee...  
   • MK7/MK8 PCV Updates: Are Turbo Inlet Pipes...  
   • MK7 to MK8 PCV Install How-To, and Amazon/...  


0:00 Intro
0:42 Subject of this video
1:15 Root problem w/ MK7 PCV system
1:38 Important points to make
4:29 Diaphragm bench testing
7:22 Stock boost vs tuned over time
9:38 Stock boost vs tuned over RPM
10:40 Epman TIP
11:40 BMS TIP
12:07 Note about crankcase readings
12:35 BMS TIP cause of smoking?
14:05 Unitronic TIP
15:00 OEM TIP w/ Venturi
16:09 Epman TIP w/ Venturi
16:35 BMS TIP w/ Venturi
17:25 OEM w/ Venturi (Restricted)
18:15 2nd vs 3rd gear problems
20:05 Wastegate duty cycle
22:36 Watching the diaphragm while driving
23:28 OEM TIP Basic Retrofit - driving
24:23 BMS TIP Basic Retrofit - driving
25:29 BMS TIP Full Retrofit - driving
26:40 Lessons learned
27:56 Do you need to go back to stock?
28:26 How to use this information
29:46 If you have a PCV plate...
31:14 Do you have oil leaks?
32:13 Is the Full Retrofit for you?
33:00 Future testing
34:10 Closing words and minor rant

www.datadrivenmqb.com


Also I've shared much of this info with Jeff of www.mygolfmk7.com - so he has started using his flow bench to test turbo inlet pipes for relative vacuum generation in a more controlled environment:
https://mygolfmk7.com/2024/01/mk7-tip...
https://mygolfmk7.com/2024/01/tip-test/
https://mygolfmk7.com/2024/02/tip-pcv...