I am building my own engine and have a question that I can not find the answer to on the searches that I have done. When putting in a stroker crankshaft one of the connecting rods comes very close to hitting a camshaft lobe. What is the recommended clearance between these two parts? I know that they will expand slightly when the engine warms up and currently we only have .006" between them. I am concerned that this is not enough clearance.

Thanks for all the help you guys provide.

http://www.ephotomotion.com/914engine/index.htm

check out this web site . I think it is covered there.......... good reading on a rebuild.

I don't allow less than .030".

I have used his site extensively (great resource) and it looks like he only allows for .008" clearance. I was not sure that was enough to cover the thermal expansion.

I'm more concerned with crank flex than thermal expansion.
The case is certain to grow more than the camshaft or crankshaft/rods, which would move them further apart.

Web cams for "larger displacement engines" have a reduced base circle thus helping with rod clearance, after that you have to start removing material from the rod itself.

Had a motor that had a shinny spot on a cam lobe and never heard a thing from it. It was being touched by a rod nut.