02-10-2020, 01:48 PM | #23 |
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FWIW, here is the most useful relevant thread I found from the F80 forum:
https://f80.bimmerpost.com/forums/sh....php?t=1363533 I expected to find a lot more information there. Definitely seems like a good idea for boosted S55s.
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02-13-2020, 01:44 PM | #24 |
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It is a good idea to install one on any direct injection motor, boosted or NA. The reason is the injectors are not spraying fuel on the intake valves in a direct injection motor. The fuel cleans/prevents the oil/carbon residue from building up on the valves.
The PVC system is necessary to vent the blow by pressure build up in the crankcase. In the old days they just vented it to the atmosphere, but emissions laws are different now, so they plumb it back into the intake. This worked for years and then the direct injected motor became popular. As miles were put on these motors, manufactures started having issues with carbon build up on the back of intake valves. This is why they are trying to filter/improve the PVC systems now. Over time a direct injection engine will have carbon build up on the back of the intake valves and this will affect performance. Adding an OCC will help reduce this from happening. |
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02-13-2020, 02:22 PM | #25 | |
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02-13-2020, 02:28 PM | #26 |
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Was the OCC full? The standard PVC system would be subject to the same temperatures with the only difference being the actual can. I can see the fluid freezing in the can, but if it is not full/overfull I do not see how this would affect the PVC system performance. Just my 2 cents
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02-13-2020, 02:39 PM | #27 | |
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02-13-2020, 02:44 PM | #28 |
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I am not doubting you at all, just trying to figure out why. As you said maybe one of the lines was at a bad angle that caused the condensation to pool up. That makes sense to me. At least it was a cheap fix. lol
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02-13-2020, 02:53 PM | #29 | |
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https://www.amazon.com/Scotch-Btite-.../dp/B005T3VYAS |
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02-13-2020, 03:03 PM | #30 | |
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02-13-2020, 03:09 PM | #31 |
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02-13-2020, 03:22 PM | #32 | |
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02-13-2020, 06:53 PM | #33 | ||
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Whatever I catch will be an improvement.
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02-13-2020, 07:06 PM | #34 |
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I ordered the BMC one today on the "ounce of prevention/pound of cure" theory as I intend to pretty much be buried in my car.
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02-14-2020, 04:52 AM | #36 | |
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02-14-2020, 10:14 AM | #37 |
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I read tons of threads on catch cans. The conclusion I came to was that they are beneficial for many cars, especially modded turbos. Apparently the S55 benefits less from a catch can than many other engines but what the hell it won't hurt the engine unless you forget to empty it or it somehow gets plugged up.
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02-14-2020, 10:17 AM | #38 | |
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02-14-2020, 12:18 PM | #39 |
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02-14-2020, 12:20 PM | #40 |
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02-14-2020, 12:37 PM | #41 | ||
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I see no downside to this.
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02-14-2020, 02:17 PM | #43 |
this is the way
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Some manufactures starting making hybrid engines that are both direct injection, but also have port injection to get around carbon build up. What's interesting with the new S58 engine is they properly designed it to filter the oil from blow by gasses and also recirculate the oil back into the oil pan. None of the B58 engines however have this improved design.
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