Posted by Janicholson on June 29, 2012 at 06:42:02 from (96.24.99.126):
In Reply to: SH compression posted by DeltaRed on June 29, 2012 at 04:29:08:
The issue is interesting in that there are variables that make our response valid -or not-. The first is that, the test cnditions must include: an open throttle, a good starting system that cranks the engine at 3 to 4 compression strokes per second, a leak free compression tester that is accurate (tested on a air source that is known pressure). If that is the case, and the engine was built with flat top pistons and a distillate head, I would say the readings are just a little low, but not much. If it was built as a gasoline SH (especially with domed pistons and or a big bore kit, it is at about 50% of normal. My take is that if it provides good power as you need to use it as you do, leave it alone. Running simi synthetic 10-40 oil, and a one step hotter plug can be helpful in reducing the foweling. Jim
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