The Jalopy Journal
Discussion in 'The Hokey Ass Message Board' started by ekimneirbo, Sep 5, 2020.
How are you checking the wall thickness in your engine before boring........
Take out the frost plugs. So you can see the cylinder walls. Then keep trying until you find the largest diameter drill bit that will fit between the cylinder walls. Subtract that from the cylinder spacing, and you have the thickness available.
Any shade tree method is just a guess, since wall thickness is never uniform around the entire cylinder.
A sonic test, or a big bucks x-ray is the only true methods with any real accuracy.
Anything you can do with a naked eye is just a very, very rough estimate to eliminate obviously poorly cast blocks with major core shift.
Ultrasonics.....compression wave only for wall thickness. Shear wave will show imperfections in the walls.
I bought one of these years (Dakota Ultrasonics) ago for porting cylinder heads. Not exactly cheap, but it saved me countless times from making the walls too thin.
Also let me know when a wall was "thicker"...than I thought..!
I bought one small radius probe for porting and a larger radius probe for cylinder measuring.
Very accurate, comes with a check tool for verifying accurateness before doing the actual measurement.
Can be adjusted for both ferrous and nonferrous materials (steels, iron, aluminums, magnesium, etc.)
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