Ok, now I am not asking what you prefer. I am more interested in how it works. If you took 2 identical weighted trucks with an equal load. Both with 300 horse power engines, one gas one diesel. I assume that the diesel truck would have the torque advantage. Would the diesel be slower or faster through the 1/4 mile ? Why?

Ok now remove the weight, which is faster?
Why?


Why I asked. It seems that everyone is stating that the diesel will out pull a gas truck and get better mileage doing it. But in the next sentence they state that the truck is slower than a gas powered truck.

 

diesel engines are usually high in torque and not-so-high in power. you want the best of both worlds? get a turbodiesel and add a banks turbo kit

 

Gas would win empty, Diesel would win loaded, well, depending on the load. If say, the load was 10,000 lbs, the diesel would whoop the gas, as it has a big torque advantage. The gas would win empty due to a higher revving motor, thats made more for speed than towing of a diesel.

 

if you had a 300 hp gas engine it would have close to 400 ftlbs of torque and weigh 650lbs a 300 hp diesel would have close to 600 ftlbs of torque and weigh over a 1000lbs.

the gas would win for a couple of reasons; # 1 weight difference #2 gas engines rev much faster so they are better at getting up to speed

though if both were this close in spec it would be a close race.

cool question!

 

The gas engine would win in the acceleration department although you can't compare a 300HP gas engine to a 300HP diesel. But as soon as you throw in a steep hill, or slick surface such as a boat ramp the diesel will come into it's own. Diesels make very tractable power. If you're familiar with motocross bikes I would say the difference is akin to a 2 stroke compared to a 4 stroke. Both makes gobbs of power but do so differently. Diesel engines also last a very long time since they rev so low.

 

So the missing link was the revs due to the burn rate of the fuel.

So lets get specific: Take 2 F250’s short bed, one with a 5.4 gas (260hp 350 ftb) engine and the other with the 7.9 (250hp 505 ftb). The gas engine would win the 0 to 60 empty. The diesel would prevail once the pull weight increased to a point that the advantage of quicker burning fuel was overcome by the torque of the diesel. Ok now I am no math major but anyone like to take a stab at a math equation to express this relationship? Just kidding. However I am curious if a diesel can equal the acceleration of the 5.4 maybe the new Chevrolet 2500HD They state that the 6.6 has 300hp and 520ftb

 

but dont forget the new duramax is an all aluminium block.....umm does anyone know if the new chevy alum. blocks have steel sleeves for the pistons ?? so if memory serves me correct......aluminium block equals less heat which improves the pony output....give or take a few ponies.....

 

Post this in the Superduty forum or Ford-Diesel.com and you'd have PowerStroke owners lined up to take on gassers. Ever seen someone launch form a light in a new PowerStroke? Some of them are fast, but that's not why you buy a diesel.

 

i know some guys running 12's in their diesel's.

propane, intake, 4" exhaust, and 120hp chip.

that's all it took.

 

I was driving my dad's '02 PS 250 the other day, and I gotta say the thing was damn fast if you got it up to a high enough RPM. On the highway in overdrive, it was just like there was no end to the power! The attractiveness of a Diesel lies in it's large and flat torque curve. That's what allows them to pull the way they do.

-Flea