What's the closest you've ever ran your valve springs to coil …
THAT is your actual coil bind. Some springs will bind on the inner spring (if you have inner springs) so don't assume that if you see space between coils on your outer spring, that you're safe. Also, if you plan on going much under .05", you need to measure EVERY spring. Coil bind can vary quite a bit in a set of springs.
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