jriffe23 Posted August 25, 2014 Report Share Posted August 25, 2014 My banshee cylinders measure 64.59 on a set of calipers. Is that good for 64.50 pistons, I'm wondering if the .09 is ring space or if I need to bore. Thanks Quote Link to comment Share on other sites More sharing options...
Surfrjag Posted August 25, 2014 Report Share Posted August 25, 2014 Take them to a machine shop to have them properly measured. Quote Link to comment Share on other sites More sharing options...
registered user Posted August 25, 2014 Report Share Posted August 25, 2014 this how i do it Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted August 25, 2014 Report Share Posted August 25, 2014 Ya, those tapes with the CM on them are super precise! Take it to someone with an actual bore gauge. You need to check the whole bore in several spots not just the top with a micrometer. 1 Quote Link to comment Share on other sites More sharing options...
Bennett131 Posted August 25, 2014 Report Share Posted August 25, 2014 Yea lol, most people cant measure by the thousandth by eye using a tape. Quote Link to comment Share on other sites More sharing options...
jriffe23 Posted August 25, 2014 Author Report Share Posted August 25, 2014 I used a set of Kobalt Caliper and they measured everywhere Quote Link to comment Share on other sites More sharing options...
Bennett131 Posted August 25, 2014 Report Share Posted August 25, 2014 How did you measure the diameter in the middle? Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted August 25, 2014 Report Share Posted August 25, 2014 Calipers are junk. You need a bore gauge and micrometer. There's 6 points to measure. No caliper will get you close to what a micrometer can. 1 Quote Link to comment Share on other sites More sharing options...
Bennett131 Posted August 25, 2014 Report Share Posted August 25, 2014 ^^^ That's where I was getting. Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted August 26, 2014 Report Share Posted August 26, 2014 Ok, rife. You don't just measure all over in the top. You have to actually measure inside the bore at different depths. Best result, let an engine builder/machinist fit the bore with the intended pistons. He'll no! This is just to ball park a cylinders life only. This is legit. Measure in as many points as you care to remember or write down. The industry standard I believe is now 6 points so the drawing is old. Sent from my iPhone using Tapatalk - now Free Quote Link to comment Share on other sites More sharing options...
m671054 Posted August 26, 2014 Report Share Posted August 26, 2014 ^^^^^^that is 6 points is it not? Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted August 26, 2014 Report Share Posted August 26, 2014 No, it's three Measurements. Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted August 26, 2014 Report Share Posted August 26, 2014 If the tool is clocked 90* at each measurement height to measure front to back then side to side yes that makes 6 points. But I guess I didn't even pay attention to the part where it shows A & B for each height. Sent from my iPhone using Tapatalk - now Free Quote Link to comment Share on other sites More sharing options...
jriffe23 Posted August 26, 2014 Author Report Share Posted August 26, 2014 Ok took them to the machine shop. They are going to hone and bore if necessary and have pistons ready for me. Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted August 26, 2014 Report Share Posted August 26, 2014 Good stuff Quote Link to comment Share on other sites More sharing options...
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