Dcr

^^^ Roger.... the actual time of building pressure is supposedly around the advertised closing, not the .050" closing. I think KB says that they take the .050" and assume a .015* later closing.

I prefer this tool by Pat Kelley, which you can find on the 2nd page of this link. It has better and more inputs on the variables, IMO. A bit more work to use, but it gives me more confidence than the KB tool for example. The link offers a good explanation of what this tool is doing.

http://cochise.uia.net/pkelley2/DynamicCR.html