Finally did my breather bypass (pics included)
#601
Since the midsixties with pcv systems vacuum is applied to crankcase. I remember the big debate over it and road draft tube!
Many were going to disconnect and no way running that commie crap!
Turned out it kept engine, oil, and environment cleaner! This is automotive engines.
Harley engine I've not had apart and not sure how engineered. Is there a filtered intake of air into the crankcase?
I'm not liking this breather system without a vacuum. My opinion goes with engine builders and wanting evacuation and roaddraft system isn't clean and providing a constant vacuum.
Yep, I'm a over thinker!
Many were going to disconnect and no way running that commie crap!
Turned out it kept engine, oil, and environment cleaner! This is automotive engines.
Harley engine I've not had apart and not sure how engineered. Is there a filtered intake of air into the crankcase?
I'm not liking this breather system without a vacuum. My opinion goes with engine builders and wanting evacuation and roaddraft system isn't clean and providing a constant vacuum.
Yep, I'm a over thinker!
#602
Since the midsixties with pcv systems vacuum is applied to crankcase. I remember the big debate over it and road draft tube!
Many were going to disconnect and no way running that commie crap!
Turned out it kept engine, oil, and environment cleaner! This is automotive engines.
Harley engine I've not had apart and not sure how engineered. Is there a filtered intake of air into the crankcase?
I'm not liking this breather system without a vacuum. My opinion goes with engine builders and wanting evacuation and roaddraft system isn't clean and providing a constant vacuum.
Yep, I'm a over thinker!
Many were going to disconnect and no way running that commie crap!
Turned out it kept engine, oil, and environment cleaner! This is automotive engines.
Harley engine I've not had apart and not sure how engineered. Is there a filtered intake of air into the crankcase?
I'm not liking this breather system without a vacuum. My opinion goes with engine builders and wanting evacuation and roaddraft system isn't clean and providing a constant vacuum.
Yep, I'm a over thinker!
#604
#605
part numbers
I am going to do the breather mod this weekend to my Ventilator. I am using brass push-on hose barbed fittings that I ordered from McMaster-Carr part # 91465K11 and push on hose # 5283K31. With this setup you do not need hose clamps. But you have to use that fitting and hose combination. We use these in the plastic injection mold industry all the time on our molds. The hose does NOT come off, in fact you have to cut them off for removal.
any other combination of barb/hose may NOT work......this combo is meant to be used WITHOUT clamps
Last edited by blueglide88; 07-03-2019 at 12:48 PM.
#606
#607
more riders eventually doing an AC breather mod to their bikes, so they may want to know how things are working down. Lot's of posts about "how I did it". Not everybody's solution
will hold up over time. And there are barbs, and there are barbs. Not all barbs are meant to be used WITHOUT hose clamps. The ones I used ARE. And two yeas / 20k later everything is holding up PEFECTLY. I like it when I read a post and get an update from down the road about how things are working out. I think others might like to know too. BTW what kind of bike lift is that?
Last edited by blueglide88; 07-04-2019 at 08:08 AM.
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Dan89FLSTC (07-05-2019)
#608
I see that you later removed the airline separator because you smelled fumes. How did the airline separator provide any breathing? Looks air tight to me,unless the rear top hole was left open,which made the separator worthless.
#609
Since the midsixties with pcv systems vacuum is applied to crankcase. I remember the big debate over it and road draft tube!
Many were going to disconnect and no way running that commie crap!
Turned out it kept engine, oil, and environment cleaner! This is automotive engines.
Harley engine I've not had apart and not sure how engineered. Is there a filtered intake of air into the crankcase?
I'm not liking this breather system without a vacuum. My opinion goes with engine builders and wanting evacuation and roaddraft system isn't clean and providing a constant vacuum.
Yep, I'm a over thinker!
Many were going to disconnect and no way running that commie crap!
Turned out it kept engine, oil, and environment cleaner! This is automotive engines.
Harley engine I've not had apart and not sure how engineered. Is there a filtered intake of air into the crankcase?
I'm not liking this breather system without a vacuum. My opinion goes with engine builders and wanting evacuation and roaddraft system isn't clean and providing a constant vacuum.
Yep, I'm a over thinker!
#610
The V twin has some challenges a true boxer engine has where the pistons approach the crank case essentially together causing pumping losses. In my shovelhead theres a rotating (timed) shaft with a breather window in it to relieve this buildup of pressure as the pistons come down. Im not sure how effective actual manifold vacuum would be with an automotive PCV system because of the size of the manifold and no plenum. I thought of the race car evacuation setup with a one-way check valve in the exhaust but I don't think it really needs it.