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Boring response By Tim Johnson - 09/30/2002 11:15:55 AM; IP 216.222.116.50 The only way to tell for sure is to have the block sonic tested. If I remember correctly, an "X" marked block would be a good canidate for this process. This process uses ultarsound to meaure the thickness of the cylinder walls. It is not fool proof though. I had a C6ME-A block that when sonic'd, didn't have enough metal on two cylinders to go thirty over. However, on the average, most 390 blocks can go to sixty over. For performance use, the machinest I use does not recommend a wall thichness less than .011 on a thrust side. Obviously though, the more wall thickness, the better. I'd be taking the other 390 block to the machine shop for professional advice. I am not a machinest by any means. The question to ask is how did that scratch get there? And, what am I going to do to keep that from happening in anything that I build? Well, time to pop all my morning pills. Good luck with your project! Tim Johnson aka oldgoofydude

This thread, so far...

Skip Navigation Links.  Machining questions -- Lawrence Friesen, 09/30/2002 Boring response -- Tim Johnson, 09/30/2002  RE: Machining questions -- John, 09/30/2002  RE: Machining questions -- Lawrence Friesen, 09/30/2002  I have been faced with this before...... -- kevin, 09/30/2002

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