Ultimate Street breather...?
Jon:
Quote from: Torben Alstrup on September 04, 2010, 10:18:04 am
For sustained high rpm a rule of thumb is that you need the displacement multiplied by 0,9 in the breather box, so that the pulsing from the engine has enough area to calm down in and thereby release its oil fog to droplets and back into the engine.
I would really appreciate more information on the subject. Figures are always great but I feel there are a couple missing:
What should be the size of the hose to the box, and at what length? (up to what rpm/engine size)
How much bigger does the hose need to be if it's longer?
How much "free" area does the air filter (s) need, and what about the bottle neck before the filter.
How big must the box be to be able to run as a closed loop?
So if you have the time Torben I would love to get some empirical data. :)
I'm not to concerned about names of the welders and finishes, but the theory and how it works.
Donny B.:
Quote
If anyone knows the volume of the Sil modesti unit it will save me removing it
Sorry, I don't know the volume of the Sil Modesti breather, I just know that it works well. My engine is a 2165 running DCNFs and I have no issues. I think it will work better with air cleaners, knowing that most folks with IDAs don't have them.
rick m:
I remember years back when Donny B accidentally forgot to put the cap back on his Sil Modesti breather and drove accross town without the cap on. When he got home there was not one drop of oil that had blown out of the engine. It was incredible how well Sil's breather worked. It made a believer out of me. I had a BERG breather on my 2110 at the time and had modified it so I was happy with it too. Still, the Modesti breather does work.
As long as the breather is baffled properly and allows the motor to breath, there are many options to choose from. I prefer the BERG and MODESTI breathers as I have experience with both. A Modesti breather is going on my new 2275.
Rick M
Kaferdog:
thanks for the Info Rick....Thats what I am looking for ....I have Clyde's Breather with 3 AN fittings ...But I wonder if the Berg Breather with 2 AN fittings will be just as good ..?
By the way Rick ..the motor it will be going on is the case you sold me about 4 years ago...!!!...Finally about ready to install it !!...taken so long but gettin there !
BeetleBug:
A breather does not know if it is on the street or not. And why do people still breath from their valve covers?
BB
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