Discussion
I'm just checking the ring gaps as I reassemble my AJP engine. The TVR build manual suggests that the top ring should have a gap of between 15-17 thou and the second ring should be 9-11 thou.
Measuring the (new AE) rings in the (checked) bores, the top rings are all around 17 thou - OK, however, the second rings are all around 14-15 thou.
Having done a bit of research on this it appears that there is a suggestion that the second ring gap should be bigger than the top ring to prevent piston ring fluttering. I have also come across a "calculator" which suggests that piston ring gap should be calculated as bore (inches) X 0.0045 (top ring) or 0.0055 (second ring). This would give me gaps of 16 and 19 thou respectively.
So - what should I do - leave them as they are, try to get another set of second rings to achieve the TVR guidance or open them up as per the "formula" above?
Any thoughts welcomed!
Also posted in Technical - Engines.
Measuring the (new AE) rings in the (checked) bores, the top rings are all around 17 thou - OK, however, the second rings are all around 14-15 thou.
Having done a bit of research on this it appears that there is a suggestion that the second ring gap should be bigger than the top ring to prevent piston ring fluttering. I have also come across a "calculator" which suggests that piston ring gap should be calculated as bore (inches) X 0.0045 (top ring) or 0.0055 (second ring). This would give me gaps of 16 and 19 thou respectively.
So - what should I do - leave them as they are, try to get another set of second rings to achieve the TVR guidance or open them up as per the "formula" above?
Any thoughts welcomed!
Also posted in Technical - Engines.
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