Measuring cylinder taper with feeler gauge and ring.

Has anyone here done this? what is the no go spec? i am thinking .010 (difference between top piston gap measurement and bottom measurement) is "too much" What say you?

Also to clarify , I what I mean by "done this" Is measure cylinder taper with a piston ring and feeler gauge. You put the ring in the bore just under where the ridge may be (where the ring actually contacts bore) take a measurement, record it, then measure at the bottom ,where the ring doesn't ride .subtract the bottom from top, and note the measurement. I am saying .010 is too much using this method. , then you should overbore. Of course bore gauges are more accurate but who has 4 inch bore gauges ? :)

This is purely just to tell if you can hone and ring or does it go to machine shop.
0.010 change in circ would be around 0.003 in dia. Is that too much?

I got that using this...

Circle Calculator

Then using the output or the circ +0.010 as the input for circ.


Seems like a legit way to do it.