| Author | Message | ||
     Krueger08xb12s |
Possibly a stupid question, but I've searched and searched past threads and can't find any directions for making a custom breather reroute system. I'm guessing it's a hose loop system for the crankcase that's broken in the airbox. If this is correct, can i simply reroute the exhaust (splooge-carrying hose) under my bike to dump it on the road (or in a catch can) and reroute the crankcase intake hose (fresh air hose) outside of the bike with an airfilter on it? If so, which hose is which? Any hints/tips/advise is greatly appreciated. A diagram or photo would be better! Thanks everyone for your help! badweb's always a great site for knowledge. | ||
| Ducbsa |
Did you check these out? http://www.badweatherbikers.com/buell/messages/384 2/6804.html?1234242057 | ||
| Pkforbes87 |
Krueger, both hoses that I think you're referring to are the same. There's a breather hose coming out of each rocker box cover, and each of them inhale and exhale while the engine is running. Most custom breather setups join the two hoses by using a "T" fitting, and routing that single hose into a filter or catch can. The link busa provided should provide you with some inspiration for re-routing the breathers however you wish. | ||
| Gearhead998 |
I've read a lot of threads about how everyone thinks these catch cans are the cats a**. But what I want to know is, having the breather tubes in the air box helps relieve crankcase pressure due to the vacuum created by the intake. Rerouting the breather tubes outside of the airbox removes the help created by the vacuum of the intake. Doesn't this reduce the effectiveness of the breathers? I get not having crap spew into you airbox, but I would think that the loss of vacuum would eventually have ill effects. BTW, I have my firesuit on incase anyone is feeling the need today. | ||
| Ducbsa |
You are correct about the loss of extra vacuum, but the pistons alternately pressurizing the crankcase and pushing the vapors out should be plenty. A friend with a Vincent has put a manometer on some crankcase connection and sees that after a few revolutions, it settles down to slightly below atmospheric, without being connected to the intake. Serious drag cars and maybe LeMans prototypes have vacuum pumps to really suck down the crankcase pressure, but that is pretty extreme. Dump it on the ground or into a can as you wish. | ||
| Andymnelson |
I once asked similar questions about crankcase pressure. The reality is this: 1) not enough vacuum created by the intake to affect the evacuation of crankcase pressure, and 2) the need is for the crankcase pressure to be evacuated- the very nature of positive pressure negates the need for vacuum on the other side. As long as the breather lines are fairly free-flowing then there is no issue. The crankcase does not need anything "sucked" out of it, it merely needs to relieve pressure. | ||
| Cowtown |
http://www.badweatherbikers.com/buell/messages/327 77/83244.html?1128795452#POST343662 |
