Ram 2500
Why is the Ram 2500 crewcab longbed with 6.7 Cummins, even though it's only 6 cylinders has more towing power than the similarly equipped Ford F250 powerstroke diesel, the same displacement at 6.7 bu...
Forum Discussion
ShinerBock wrote:FishOnOne wrote:
Also notice how short the power band is. Not a big deal when your running a lot of highway miles, but is a PITA when having to run around city/town speeds.
I would also suspect that crash tests standards maybe more difficult to achieve with a straight six.
The engine configuration does not determine the powerband either. The bore/stroke ratio does. An oversquare inline 6 can rev high just like the BMW N55 3.0L engines that redline at 7,500 rpm. Likewise an undersquare V8 can have a lower limit like the Ford 5.4L with a 5,200 rpm redline in the F150. The more undersquare an engine is the lower it's max speed and the lower it gets it's peak torque. It has nothing to do with cylinder configuration.
I don't see how an engine configuration would affect crash test ratings if it was made to break away properly in a wreck though.
I believe the power band I'm referring to is addressed in your article under the cons section with a Bore/Stroke configuration as semis have.
I've seen a wrecked truck with a I6 pushed into the fire wall in which invaded the interior space pretty bad. Engines don't crumble and absorb energy during a frontal impact. Another example but with a Ford V10 was the Ford SVT team was looking at utilizing a V10 in the second generation Lightning, but because of the extra long engine it wouldn't pass their crash test standards (again invading the interior space)at the time so that scenario was canned.
