Posted 2/25/2012 22:45 (#2251806 - in reply to #2251765) Subject: Re: big cam, small cam cummins 855
Big cam engines have a larger cam bushing/block bore diameter so the cam"egg" can be larger. More push rod travel for more valve and injector travel. I think BC4 and the 88NT engines were the "low flow" engine models. The mechanical N14's were the next series but I think were maybe normal coolant flow. Formula engines were rated at 1800 RPM vs. 2100 for regular engines.
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