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Old 07-27-2019, 11:32 AM   #1
DrivingPassion
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Join Date: Sep 2014
Location: Greater Seattle, WA
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My Ride: F22 M235i, F80 M3
Design: Eat where you poop



I'm not sure if this is correct forum to discuss this ...

It's interesting why partially combusted gas/oil/air mixture is vented thru the PCV and fed back into the intake valves, why not fed into the exhaust? Is this done all in the name of saving gas and improving emission ctrl?

This is the same design issue as the M16 assault rifle direct impingement where they fondly call it: eating where you poop.

Disadvantages:
You need more invasive maintenance (like wallet blasting of the valves)
Increase intake valves choking and decrease efficient gas flow
Definitely decrease longevity of the engine


What are your thoughts?
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Old 07-28-2019, 10:26 PM   #2
darkfires102
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Join Date: Mar 2019
Location: Colorado, USA
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My Ride: 325xi, '07 E60 M5
Year: 2003
Transmission: 5spd Manual
Design: Eat where you poop

You just answered your own question...its solely for emissions/mpg. Cars used to be catless, everything exposed to atmosphere, dumping excess coolant on the ground


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Last edited by darkfires102; 07-28-2019 at 10:26 PM.
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