Quote:
Originally Posted by tumpa8
California98Civic reported that their oil catch can inspection post a few hundred miles revealed no oil/water sludge but only a slight discoloration and a gasoline scent. Repaired PCV Valver appeared to have contributed. The observation suggests minimal blowby, indicating engine health. However, they question why the PCB dumps into a dry rather than wet part of the intake, leading to gunk accumulation. Would routing the vehicle to the wet part facilitate consistent cleansing and burning?
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Well there is no wet part of the intake manifold is why.
Only a older carb or Throttle Body injection set up is there any fuel flow in the intake.
Nowadays your fuel injection is Port or direct injection, port injection is right at the intake valve and direct is right into the combustion chamber.
Dry intakes allow for better air flow over the older wet one where nearly every bent could cause fuel drop out and puddles.
That does leave the problem of gumming up of the EGR valve and throttle body from the junk in the exhaust.
From what I have found and read, EGR can be a major help in MPG, mainly by displacing part of the incoming fuel and air.
I am not sure how much unburned fuel is present to ad to the new fuel.
And if reburning it helps with pollution.
Rich