Breathers
Seasoned HDF Member
Joined: Mar 2010
Posts: 20,961
Likes: 7,489
From: Poolville
No way in hell yer Harley will even come close to Achieving "negative pressure"... tho logic tells us it may...Experience Shows it is Impossible...Best we can hope is to let 'er breath uninhibited..and trust me... it will all be Exhale!!!
And yes... the head breather would need to be pretty badly Sumped to get oil outside the System...
I bet letting a Stroker Breathe thru those Heads is gonna be challenging... Drag Racers do it completely Differently... But... We ain't racing... just want to do the best we can with what we gots...
And yes... the head breather would need to be pretty badly Sumped to get oil outside the System...
I bet letting a Stroker Breathe thru those Heads is gonna be challenging... Drag Racers do it completely Differently... But... We ain't racing... just want to do the best we can with what we gots...
As for the stroker and breathing, it's also bored which means more volume as well. I only have issues at higher RPM......
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Cruiser
Joined: Mar 2015
Posts: 104
Likes: 3
From: North Ridgeville, OH
Man thank you guys. Some of this is pretty advanced; but I love what I'm learning. So as I'm reading through the thread, I've started asking myself why I have an oil cooler even on the bike. 89, fxstc CV carb swap out and some V&H short shots. Oil cooler is the style that was probably put on in 1989 as well. Living in Cleveland, OH. I'm starting to think the cooler isn't worth having on it. Thoughts?
Last edited by jf7689; Feb 7, 2019 at 01:31 PM.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,059
Likes: 4,534
From: Haslet Texas
Man thank you guys. Some of this is pretty advanced; but I love what I'm learning. So as I'm reading through the thread, I've started asking myself why I have an oil cooler even on the bike. 89, fxstc CV carb swap out and some V&H short shots. Oil cooler is the style that was probably put on in 1989 as well. Living in Cleveland, OH. I'm starting to think the cooler isn't worth having on it. Thoughts?
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,554
Likes: 3,309
From: Cental, MI
I disagree that oil coolers are Good... necessary Evil, if ya live where it is hot... But... again... anything at all in the oil return line is a bad thing... Wonders why the MoCo decided to put the oil filter there... ensure you have the Absolute correct oil filter in place, and if Unnecessary... why plug up the return line with a Cooler...
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