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How to measure flycutting depth?

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Old 04-27-2011, 04:08 AM
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Default How to measure flycutting depth?

How does one measure the depth of a piston notch (flycut)? Im not talking about the PTV, I wanna know how to measure the amount I take out of the piston.
Old 04-27-2011, 02:53 PM
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anyone?
Old 04-27-2011, 02:58 PM
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One method is to measure to piston to valve clearance, and however much more clearance you want (assuming you're not hitting AKA: zero clearance) you cut. Unless you measure what you have and know how much you want to have, you're just going to cut a certain depth and try to be consistent on it.
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Old 04-27-2011, 03:02 PM
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The thing is my heads are not done, (still at the shop) and I wanna get everything ready so I can bang the car out in a day. A local shop says they remove .100 on thier reliefs. I bought some tools and want to do the same. Im just wondering how to measure the cut
Old 04-27-2011, 03:17 PM
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I'd likely start at .080" deep if I'm shooting for a number without measuring piston to valve.
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Old 04-27-2011, 03:19 PM
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Originally Posted by Matt@Texas-Speed
I'd likely start at .080" deep if I'm shooting for a number without measuring piston to valve.
How do I measure the .080 deep Im taking out of the pistons? Thats my question
Old 04-27-2011, 03:20 PM
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Feeler gauges would work fine, and can be purchased from any autoparts store for a few bucks.
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Old 04-27-2011, 03:23 PM
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Thats what I was thinking but wanted confirmation. Its amazing that I couldnt find a thread where some one says "Use a feeler gauge to measure the cut in the piston". All of the ones I could find involved using PTV to measure depth.

Thanks for your help Matt!
Old 04-27-2011, 03:33 PM
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Glad to help! Let us know if we can help with anything on your build!
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