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Old 05-30-2019, 11:28 AM   #15
torga
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Quote:
Originally Posted by Turbosharef View Post
when you open your catch can is there alot of crap in it?
Yep, plenty of schmutz. I check it once every other week.
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Old 05-30-2019, 11:54 AM   #16
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Originally Posted by torga View Post
Still undecided whether to run just this, or to keep my catch can, plug the PCV-to-IM hose back in and run this. Theoretically, that would be the same as OEM function, just with extra filtering.
I have been on the fence ever since I bought the car and every time I research it I come to the conclusion that the OEM works just fine as long as it is maintained. A catch can is nice though but for the cost of them I can replace the PCV every 30-40k miles and be ok. That piece looked like a great solution to weak OEM parts so I figured Id give it a go. Maybe if I find a used catch can for cheap Ill go that route.
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Old 06-01-2019, 10:50 AM   #17
Rolling_GTI
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Don't change the pancake pipe. Everyone does this without understanding why it's shaped like that, there is a reason! That small tube speeds the flow of air up in that area, which inproves throttle response and boost lag. I was a engineer for compressors for many years, I know what I'm talking about.
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Old 06-01-2019, 12:23 PM   #18
torga
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While what you said is absolutely true for the stock tune and what the engineers intended, the stock pancake pipe is too restrictive for more aggressive tunes, which is outside of their design intent. You're pushing 4-6psi more than stock with some tunes - that's a lot more air flow/mass.
The contstriction is great for the stock boost and good low-end response, but becomes a bottleneck for more power.
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