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Alan L Alan L is offline
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Join Date: Apr 2006
Location: New Zealand
Posts: 3,185
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.
Alan
Old 04-16-2008, 10:00 PM
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