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swood |
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None ![]() |
KB - 96mm pistons and stock overbored steel barrels. I'm getting ready to ring the pistons and check/set the gap. I believe the gap should be about .006", but can't remember and can't perform a search for some reason (some virus has dissed me).
I placed a ring in the top of the barrel and the gap was around .021". That's a bit over .006". Am I measuring it the right way? I measured my pistons and yes they are 96mm. Of course I 'll second guess myself and check again. Thanks dudes. Wow, post #100! I'm getting up there! |
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J P Stein |
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#2
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Irrelevant old fart ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None ![]() |
The comparison between the upper and lower ring gaps is not as bad as it seems. What you are doing is comparing circumference of the bore in the 2 different places. The variation of the circumference is approx 3.14 times greater than the variation of the bore diameter.
You're actually looking at about .002 difference in bore dia. Chris hit the nail on the head. Measuring bores is a job for a bore gauge. Your reading of 3.78 is short 2 decimal places. A dial bore gauge will read in tenths.. (.0001). An inside mic will do the trick for a quick and dirty job....if you have "the touch" you can read to half a thou (.0005) or so. |
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