BenK wrote:
ramyankee wrote:
By my sig, i pull with a 2002 8.1.....Its specs are roughly 340HP and 455 lb ft of torque. If a guy were to opt for a 2000-2002 Cummins, approx the same specs, does a Diesel pull any easier. Just a thought.
I realize they tow at a much lower RPM.
Thanks. Just curious.
Too long and haven't read all of the responses...here is mine
You are comparing apples to oranges
First, one has more BTU's per equal volume measurement than the other
So not a level comparision
PSI on the piston top is the name of the game. One has a dialed in
or designed in higher compression ratio vs the other. One has more
potential energy via that higher BTU count and higher compression
ratio out of the box.
SMOG controls are different and makes a huge bite out of performance
Not all the time, but during 'their' working cycle periods
Most of today's diesel's in TV's are forced fed. Gassers are not
That is back to the PSI on the piston top again
There are a host of other attributes just for the ICE. Like valving
(multi, cam profile, push-rod vs OHC, etc)
Then the rest of the drive train. Most notable is the gearing all the
way to pavement and that includes tire rev's per mile
Bottom line is the biggie...one has more BTU's than the other and therefore
'should' have an advantage for your question
My 7.4L pulls as good as that era's diesel's, but they all get better
MPG because of their higher BTU's per gallon
btu's per gallon goes to the diesel which contributes to the diesel's better fuel economy but as far as which fuel can make more torque and power per displacement the winner is gasoline. Diesels outperform gasoline engines due to the fact they lend themselves more easily to turbocharging. Take the turbo off a diesel and you'll see how that more btu's per gallon doesn't put as much pressure on the piston as gadoline.
