Is there a "how to.." for crank measurement, and bearing verification? Options

[malcolm2]

I am gonna make a 2 liter from my 1.8. So I have a refreshed 71mm crank that I have been told has been ground to -0.010.

I measured as best as I can with a digital mic and got about 59.66 on the mains and 49.65 on the rod journals.

Where can I find the STD specs and ranges ? were they 60 and 50, respectively?

Since I know nothing about this crank, how can I verify the 71 mm measurement?

[malcolm2]

YES, It seems that @jtprettyman has passed it on to me for the cost of a couple IPAs. He told me it was from you. (IMG:style_emoticons/default/piratenanner.gif) Only a few of us 914 guys around in Middle Tennessee. Todd and I have swapped a few parts back and forth over the years.

I did find the crank specs in the Tom Wilson book. So all the type 4 MAIN journals start out at 59.971 to 59.990 mm and #4 specs at 39.984 to 40.000 mm (i forgot to measure this one)

with my measurement technique they were -0.27 to -0.29 mm (-0.01063" to -0.01142")

I will get me a micrometer or take it to a shop and had planned to give plasti-guage a shot.

My last engine was all standard so this is my 1st time with undersized anything.... My case measures straight and true. Measured each side of the saddle with a snap gauge and a straight edge from saddle to saddle with a feeler gauge under it.