6.7 Cummins vs 6.6 Duramax
As someone who knows next to nothing about Diesel engines, I am trying to figure out the strengths and weaknesses of these to. Any opinions would be appreciated.
Forum Discussion
Without getting too much into the weeds, where this will soon go, there are some basic differences between the layouts. Both V8 and I6 have primary and secondary balance and make fine engines. A couple of the differences are:
Cummins - Inline six has 7 main bearings and long stroke crank. Better torque characteristics but slower spin up. Cast iron head and much work can be done while still in the truck. Heavy.
Duramax - V8 has 5 main bearings and a shorter stroke crank, quicker to spin. Aluminum heads and more difficult to work on due to V configuration.
Both are good formats, It's the bolt-on stuff that makes the difference in terms of reliability. If you are buying used, there were good and bad years with both.
Cummins - Inline six has 7 main bearings and long stroke crank. Better torque characteristics but slower spin up. Cast iron head and much work can be done while still in the truck. Heavy.
Duramax - V8 has 5 main bearings and a shorter stroke crank, quicker to spin. Aluminum heads and more difficult to work on due to V configuration.
Both are good formats, It's the bolt-on stuff that makes the difference in terms of reliability. If you are buying used, there were good and bad years with both.
