Jump to content

Crankcase venting idea


Recommended Posts

An unusual thought I had on venting the crank case.  Could i vent the hoses straight to the exhaust about midway (I have a full exhaust).  The idea being that the exhaust would work as a venturi to keep a negative pressure in the crankcase.  But also that any sludge would get boiled off or burned up.  Not sure how it would work in practice - whether it would be hot enough and whether it would smoke like a bastard.

Link to comment

I think you will need an actual venturi pipe and a check valve thingy installed in your exhaust system. 

 

Otherwise - in my head - you will be sucking hot exhaust gasses into your engine in the downward stroke. 

 

Could be wrong,  but looking at the P.A.I.R.S design currently implemented on the engine they all have vacuum operated valves and flap valves.

Again... First thought.

 

Link to comment

Yes those valves can be used - they need to go in the collector to get maximum draw and with an exhaust having no back pressure - Ken Cooper used on his drag bikes for years! They ain't called anti backfire valves for no reason - an open line to the crankcase with highly volatile air / oil vapours from the exhaust could blow the crankcase apart quite spectacularly! And as the vapours do contain oil, you'll have a constant blue haze behind you!

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...