Here's what NRHS says about the oil breather lines:

Note 1: to maximize power and reduce carbon build-up, HurricaneFlow air cleaners do not route the blow-by from the breathers into the intake tract the way the stock air cleaner does. We recommend routing the head breather outlets to a small filter (to absorb the moisture component), or to a catch can.

And if I really cared:

Note 2: HurricaneFlow air cleaners are for off-highway, closed course competition use only and are not legal for sale or use on pollution controlled motor vehicles. (This is because of the rerouted breather lines.)

 

From most of the people that I talked to on the XLForum they said that rain really don't effect it. The setup does come with a cover to put over it that will keep the rain out but most people don't use it because it steals a few hp.

As far the oil blow by that everyone is asking about. The way I see it is would you eat all the food off the floor that dropped while you were eating. I really don't want to use the carb to recycle crappy oil that is being spit out.

 

I had my bike dynoed before and after I had my Forcewinder put on. (at the time of install). I gained 2HP from the SE air cleaner to the Forcewinder. Not much, but it's a gain.

 

XLOCD
Imust have my dork hat on today... but I thought the whole reason to have the intake tubes on the (screamin eagle kit) routed back to the intake was to eliminate the blow-by.

 

"As far the oil blow by that everyone is asking about. The way I see it is would you eat all the food off the floor that dropped while you were eating. I really don't want to use the carb to recycle crappy oil that is being spit out." quoting slammedsporty04

On carbed car and truck engines there is installed at the factory a positive crankcase vent (PCV) which routes the oil blow by back into the carb. No one has had any issues with that. Before the PCV was used a pipe routed the oil blow by down under the vehicle and eventually itdripped onto the ground.
So I personally think how the oil blowby issue should be dealt with is up to your own personal preference. Also, for me,the upgrade costto the Forcewinder from my Screamin Eagle to gain a mere 2 horsepower just is not worth it. As stated this is only my opinion.

 

You still have oil blow-by, you're just dumping the oil blow-by iback nto the intake air/fuel mix. I never heard of that doing anything positive for the combustion chamber mixture, unless you are running a 2 cycle that requires a gas/oil mix. Sucking the oil blow-by back into the intake is the result of EPA BS. The carbs job is to mix air & fuel, not air/fuel/oil. My .02

 

I know this is a burned up, and "dirty" topic, because of all the blow-by, but did I read the post correctly that the Forcewinder gave only a 2hp gain as opposed to the SE A/C? And, with that being said, I am thinking of going SE A/C with SE II Exhaust. Any suggestions would be greatly appreciated. Also, while on this topic, I live in El Paso, and would it be wise to go to 2-into-1 for the low-end gain? I'm not one to run around at over 100MPH, though I have done it once.

 

They both dump oil back into the carb or mist it out on your pants leg. The forcewinder gives you a LOT more leg room that a stock
AC as mentioned you will need a support backet and also in your posted pics theres a part missing, the chrome U tubes
I have a mod in the under 50 bux thread on how to dump you oil out the rear of the bike, a good thing IMO
I hated to come home with that crap all over my jeans...
https://www.hdforums.com/fb.asp?m=2550638

 

Oil blow-by=More crapped up air filters so HD can sell you new ones... I hate the ham can, and I hate the blow-by. I'm on the hunt for a new AC myself.

 

Thats another great mod, you will feel it seat of the pants for sure.