Originally Posted by Maximo

So your saying a rich setting causes the engine to breath thru the front bearing ?


I actually believe a little differently... IMO running the engine lean causes them to breath thru the front bearing.... A lean setting results in a loss of the engines hydraulic seal along the crankshaft.....These engines rely on a fluid film to seal the crankcase...disrupt that film and these things will start hoovering thru the nose......

At the end of the day tho we do agree that dirt kills bearings..... doesn't matter how it gets there, lean, rich , osmosis or teleportation ..dirt kills bearings.........

And for plugging that bypass port...You may not have found much reason to block it, but I most certainly have ...On my engines I have no choice in the matter......plain and simple the more HP a engine makes, the stronger the vacuum signal the engine makes ,and the harder its going to suck..... and because of that,any areas of vacuum loss will magnified... On a stock or mild powered engine that bypass may supply just enough vacuum to remove excess oil and fuel from the nose to prevent it from leaking... However On my high powered modifieds that little port becomes more like a nozzle on a mini vacuum cleaner, With strong enough vacuum to actually start drawing atmosphere in right thru the front bearing..which if your running in a dusty environment results in the front bearing plugging solid with a dirt in only a matter of minutes....A no a 17011 will not help any, it will fill up with dirt just as quick as any other.... The only way to stop this from happening is to block the bypass port..............Now a low powered or mild engine will not benefit from from blocking the bypass port nearly as much as would a high powered modified, but it will still benefit to some degree... Even a mild engine run in dirty conditions will ingest less dirt thru the bearing then it would if the bypass was not blocked....Basically the more powerful a engine is, the more it is going to benefit from having the bypass plugged...On most of my engines blocking the bypass is necessary ...

Quite frankly i have seen and dealt with MANY more engines in "race" application than you have so please spare me

you really have absolutely no idea how many engines I work on ..for you to even say this just shows me how arrogant of a person you really are...All I can say is keep on talking buddy, I am going to enjoy the day when our paths cross and I can make you eat those words..