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Your spot on Roger.Its Georges fault, that he has not done a post on making teeny tiny hydraulic lash adjusters. But the usual method of compensating is to make the cam then undercut the base circle by the anticipated lash. That will have to do until George stops being lazy.
I believe Ron's Camcalc program was not intended to be a design tool. It's function is to generate a table to cut a camshaft with a set of specific input data. The design should be done before you use the program to calculate the data to cut it.How do others compensate? Put more duration in your cam lobe profile. Personally I put about 280 - 300 degrees in my cams and lash .003ish and it is what it is. Of course this is for a multi-cylinder engine and not a hit miss. Does it really matter? Maybe. It does to me. I think an engine with more duration has a rich, warm sound to it at idle. If you want an engine that runs and it doesn't matter what it sounds like, then probably not. If you are worried about 220 Vs 250 I am not sure you will be able to see or hear a difference in a model engine.
In the past I have just undercut the base circle.
Steve, you are using a much bigger opening angle. What angle do you use between the lobes?