| Author | Message | ||
     Ourdee |
I wanted to see how much bypass gas my twin had. We can call it blow-by. I found it strange that the balloon just puffed up for a few seconds then inflated. The motor had been turned off for 12 hours. My system does not have a filter or catch-can. | ||
| Ourdee |
Now I need a balloon at 3k rpm, engine warm. | ||
| Ourdee |
Warm engine, 5k rpm lowered to 3k rpm and pop. | ||
| Swordsman |
That's pretty interesting. Looks like its all outgoing air... I never saw the balloon shrink back any. But why in the world does it take a few seconds to start inflating at all...? It's completely limp, then suddenly expands like crazy. Weird. ~SM | ||
| Hexangler |
Looks like its all outgoing air...Aren't there poppet valves in the head that only let air go out? | ||
| Xl1200r |
If air were to go back in you wouldn't have any engine vacuum, which is kind of important. And engine is, in it's most basic form, a big air pump. | ||
| Gentleman_jon |
Looks like you gotta change your balloon pretty often. That's for darn sure. Think I will stick with my old Drummer catch can for now. I just drain it every other time I stop at the 7/11. Don't want to get any of that damn splooge on my driveway. Noam' Sayin' ?  | ||
| Patches |
"It's completely limp, then suddenly expands like crazy. Weird. " Would it be Positive Crankcase Ventilation valve opening up?   | ||
| Glitch |
Looks like you gotta change your balloon pretty often.  | ||
| Rotzaruck |
I think you are on to something great here. We need a really big balloon, how hot is that air? | ||
| Swordsman |
Ah, it just hit me, probably take a few seconds for the crankcase to build any pressure inside. Duh! About the one directional airflow: I thought that was the whole reason we needed to put filters on the ends, because it breathes forward AND back, and could suck debris into the crankcase? ~SM | ||
| Sparky |
The delayed expansion does seem weird. Might it be due to the oil pump scavenging oil back into the oil tank? Upon startup, as the pump is taking oil out of the crankcase, the engine is putting a small volume of gas into the crankcase. Then when there is no more large volume of oil to remove, it starts building pressure. | ||
| Blake |
I think it just takes time for enough pressure to build in order to overcome that initial high resistance to inflation of the balloon. Anyone who's blown up the long skinny balloons, like clowns use to make animal shapes, will know what I'm talking about. As mentioned above already, the downward stroke of both pistons will displace air/gasses in the crankcase even without blow-by. But the blow-by is needed to replenish that exhausted air/gasses, yes? | ||
| Fahren |
It's completely limp, then suddenly expands like crazy. Weird. Must take a while for the Viagra to dissolve into the fuel supply and hit the engine...  } | ||
| Ourdee |
I was surprised by the delay at start-up too. It does it cold or hot, high rpm or idle. In conclusion; I feel safe not running a filter on the end. | ||
| Natexlh1000 |
This is why I never bothered to put a superfluous filter on the end of my vent tube under my X1. I have left my ULY bone stock simply due to the fact that it doesn't dribble condensation on my right leg. | ||
| Al_lighton |
I've been telling people for years.. the breather "filter" is really just a breather "diaper" for the end of the line. If you don't have it there, there will be a drop of oil or 2 on the ground everywhere you part your bike. The PCV valve is just a one way flapper. The different Krank Vents and their ilk that make all these power claims are just in-line versions of the same things. Which is why their claims are BS, if the first one way valve is functioning, a second one-way valve does nothing If they are functioning properly, no air comes back in that line. Al | ||
| Hexangler |
Right, but if one of your two PCV's does fail, and your not protected by a filter... | ||
| Jcbikes |
Ourdee, I am interest in exactly what you did in routing your lines and how you made them. Do you have a step by step or pictures on how you did this and what parts are needed? | ||
| Ourdee |
Instead of running it out the front, run it out the back. You need about 4 feet of 3/8" hose, a brass Tee connector for it, and wire ties. Check the link below and let me know if you have any questions. I have to go to work now, but should be back on the web tomorrow. This was what got me going on it. http://www.badweatherbikers.com/buell/messages/327 77/449739.html?1238910149 | ||
| 5liter |
Got mine running to just behind the plate in the back. Took the filter off and ran the hose. Not much splooey if you drain regularly. |
