Digital Bore Gage (help)
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From: Orlando, Fl, USA
Digital Bore Gage (help)
Ok, bumping this up for some input from you guys.
I am using CP pistons. My HP goal is 800ish. I had my K24 bore to 89mm with new sleeves from Golden Eagle. The bore diameter on the spec sheet from CP is 3.504" with a piston to wall clearance of 0.0035". Because of the HP level I am pursuing, I need a piston to wall clearance of 0.0055" looser.
Using my micrometer, I set it to 3.506", which is 0.002" looser to achieve my clearance of 0.0055". Then, I take my digital bore gage and in inches, I take my measurement inside my micrometer and zero it out so that it is set to 3.3506" on the bore gage.
I then go to each of my cylinders and walk the bore gage and I get a reading of 0.0000, which means to me that each cylinder is within 3.506" (.002" looser), which is looser than the spec sheet 3.504 (that is what I want).
Here is what I am having trouble. If I set my micrometer to 3.504" and zero out my bore gage with that measurement and go to measure each cylinder, it also reads to 0.0000".
With that said, if I set the bore gage to 3.504 or 3.505 or 3.506 or 3.507 or 3.508 using the micrometer and then go to measure the cylinders, my bore gage tells me that each cylinder is within either spec because they each hit a reading of 0.0000. If I go to 3.400 or 3.600, it then shows it's off. That doesn't seem right to me. It should be precise and not say that it is 0.0000 within a specific range. Either my bore gage is defective or I am missing a step in my measurement for accuracy. I am taking my block to a machine shop today so that they can check the clearance and adjust the bore on each cylinder for my desired clearance. However, I am wondering if any of you guys have any input?
When I get the block back, I'll still have to check my clearance to ensure the machine shop got it right so I'll need to figure this out. Any info/tips are appreciated
I am using CP pistons. My HP goal is 800ish. I had my K24 bore to 89mm with new sleeves from Golden Eagle. The bore diameter on the spec sheet from CP is 3.504" with a piston to wall clearance of 0.0035". Because of the HP level I am pursuing, I need a piston to wall clearance of 0.0055" looser.
Using my micrometer, I set it to 3.506", which is 0.002" looser to achieve my clearance of 0.0055". Then, I take my digital bore gage and in inches, I take my measurement inside my micrometer and zero it out so that it is set to 3.3506" on the bore gage.
I then go to each of my cylinders and walk the bore gage and I get a reading of 0.0000, which means to me that each cylinder is within 3.506" (.002" looser), which is looser than the spec sheet 3.504 (that is what I want).
Here is what I am having trouble. If I set my micrometer to 3.504" and zero out my bore gage with that measurement and go to measure each cylinder, it also reads to 0.0000".
With that said, if I set the bore gage to 3.504 or 3.505 or 3.506 or 3.507 or 3.508 using the micrometer and then go to measure the cylinders, my bore gage tells me that each cylinder is within either spec because they each hit a reading of 0.0000. If I go to 3.400 or 3.600, it then shows it's off. That doesn't seem right to me. It should be precise and not say that it is 0.0000 within a specific range. Either my bore gage is defective or I am missing a step in my measurement for accuracy. I am taking my block to a machine shop today so that they can check the clearance and adjust the bore on each cylinder for my desired clearance. However, I am wondering if any of you guys have any input?
When I get the block back, I'll still have to check my clearance to ensure the machine shop got it right so I'll need to figure this out. Any info/tips are appreciated
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