case and head vents, do I need to run a breather box? |
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case and head vents, do I need to run a breather box? |
wayne1234 |
Jan 22 2010, 11:23 PM
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#1
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Member Group: Members Posts: 260 Joined: 6-April 09 From: indianapolis in Member No.: 10,238 Region Association: None |
Ok dual webber carbed 2.0, I think the PO had the head vents running to a T then to the oil breather near the oil cap... Is this right?? I did a search and now I'm really confused,,,,
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ME733 |
Feb 3 2010, 08:47 AM
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#2
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Senior Member Group: Members Posts: 842 Joined: 25-June 08 From: Atlanta Ga. Member No.: 9,209 Region Association: South East States |
..........Ok , I shall continue to point out the absurd falacy of UNVENTED HEADS....Some of you people have become so convinced over the postulating of this little selfserving group of mechanics and marketing whizbangers, that I really wonder sometimes how you people got to the place your IN. So as JAKE wants to continue this dialog-with his -all knowing- points of view, I WILL ADD A FEW MORE COMMENTS.............1) I dont need to memorize what(years) heads have or don;t have head vents....I used to just drill-tap- made my own.( like you have previously done and discussed)....2. going down the road of ...the oil drains back faster with unvented heads....I have to wonder EXACTLY AND PRECISLY...how this observation was accomplished..(sort of along the lines of Melling oil pumps have internal oil leaks which you people have stated)...3. And If the oil drains back faster, it,s due to the FACT that the oil is MUCH HOTTER.(and breaking down)..due to the fact the HEAD is much hotter, Due to the "trapped " heat in the head.(with out vents)...4. the trapped heat has many down-sides., not the least of which is...(drum-roll)....the Increased heat affects the VALVE SPRING tension, and that affects how the engines top end, ( cam lobe tracking,)( valve bounce)...at way high RPM,s is affected. Hotter the springs=loss in valve seat pressure.=shorter valve spring effective pressure/life. Ok .(solution)..so just increase installed seat pressure..=...that increases rotational force...just to turn over the engine. (use torque wrench to conferm.). This get you into robbing Horsepower that you busted your ass to create in the first Damn place. Unvented heads have no advantages...street or race....5. Did I read that you people believe oil does not cool the HEADS/ engine? Really? honest ??????.( you probably made a typo error)...6. HEAD VENTING is a good thing in any form....O.E.M. or otherwise.
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