View Single Post
Alan L Alan L is offline
Registered User
Alan L's Avatar
Join Date: Apr 2006
Location: New Zealand
Posts: 3,249
I can confirm there are overlap and non- overlap phases. The initial problem I had was I was using my leak down regulator system - this creates a strong pressure differential at the gauge - hence the gauge read high pressure but the gas flow on the other side was quite low. Fixing that, I can pressurise to about 0.5 bar now, but have large gas loss somewhere.
When I rotate the engine under these conditions I get peaks and troughs of pressure - which would relate to the overlap phases. Makes sense if say 10 deg overlap, then = 60 deg of total overlap = 300 deg with no overlap. Seems about like that. My clock gauge now registers, but I have to find where my 2 cu ft/min is disappearing to.
Old 04-16-2008, 10:00 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #17 (permalink)