machining 273 crank for later 904 converter

[1WildRT]

The way to get accurate reading in a bore like that is with a bore attachment... It allows you to reach in the bore & have the indicator read without being at an odd angle..

 

[RustyRatRod]

Alright, just got the ID done,

At this shallower position, I got .006" max
View attachment 1716487406

This deeper one I got .002" max, more like .0015"
View attachment 1716487405

Both I'm estimating are 30 degrees from perpendicular so the actual runouts are higher than what I saw.

If I go deeper the gauge will be at 45 degrees and will probably deflect, but it's better the deeper I go so far.

The OD runout I'll get here soon, good call! Hadn't thought of that one

The OD will probably be "whatever" the factory spec is. I think the ID is ok. I don't think you'll have a problem with it.

 

[65TerrorCuda]

The way to get accurate reading in a bore like that is with a bore attachment... It allows you to reach in the bore & have the indicator read without being at an odd angle..
View attachment 1716487407

I was trying to visualize something like that, thank you! Might also just play with some trig if I get bored.

The OD will probably be "whatever" the factory spec is. I think the ID is ok. I don't think you'll have a problem with it.

Sweeet. Mucho appreciated. Why did that guy have to mess with my head lol

Thanks again guys!!!