To get back to your original question, how many CFM.....
According to Centriprecleaner.com, the 8V71 requires 875CFM, the 8V71T requires 1250 CFM. The L10 requires 594 CFM and the LTA10 requires 687 CFM
I would assume the 71 series Detroit requires more air because it is a 2 stroke and makes power on every stroke. The Cummins is a 4 stroke and makes power every other stroke.http://www.centriprecleaner.com/engineguide.html
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