Speedmaster Small block porting tips and results Part 1

The meter has cd01-cd11 to set from for anything from steel glass pvc copper etc. trouble is when setting it that way you have a cast iron setting, gear cast iron, modular cast iron. Using those settings I think the closest I got it was .020-.030 and who would really know. Heck the one iron setting was .100 off. Using it manually I am setting it to a part of a know thickness. I plugged in the cast iron setting I programmed in three days ago and checked the motor mount on my engine block. There was .002 difference between the checker and my Harbor Freight digital calipers. That’s close enough for this guy. I found the manual setting to be.
6350 aluminum
4950 engine block
5890 steel

That may save someone some time. I don’t really have a lot of time to play with it now but wanted to check it out in case it didn’t work. It has a .198 steel button on it to calibrate to for steel.

That's what my guy did, he set it up on the main web on my R1 block. He also said that the material that it it was calibrated on could change the accuracy. If it was calibrated on something like a normal production block and then used in a high nickel content block the measurements would be off. That's why he calibrated on the block he was checking.