Currently laid off because of the GM strike and its a rainy day here in Michigan today, so i'm getting some reading in. David Vizard has some interesting writings no one seems to follow. Picking lobe sep is just one. He does explain correct compression as being a good thing to have to enhance air flow and states the higher you go with compression the wider the lob sep needs to be and my pipemax 4.5 suggests the same for my combo as 113-114 being whats needed with 262/270@50 duration. This lob sep is something I never see in N/A engines, power adder engines usually. Can anyone add anything to this mind set? I have always had the mind set 108/110 was what you used in an N/A engine.