Mustang Shumustang
09-23-2014, 03:55 PM
#23
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To a lot of guys, a 150 was bought for work and towing. For me, it was bought for a little light weight towing, and IMO, it failed. It is a nice car, and I do like it. So, since I'm lucky enough to have access to basically whatever I may need, give me 500hp or more. It doesn't mean you'll get 5-6 mpg, but, I would like to to be able to blow most everything off the road, if I felt like it. It's the kid in me, I'll NEVER grow up!!LOL
09-29-2014, 05:47 PM
#25
Senior Member
Not sure about the real reason why Ford (or anyone else) does it, but I think it is about duty cycle in most cases. Ie, how long they expect the engine to run at max output.
For example, a Mustang can only run at max power for a few seconds, because beyond that, it will be going 100 mph and you let off. Plus, it isn't pulling a load. So it is only running at max output like, maybe 1% of its life. Conversely, a pickup truck might run at max power for a minute or 2 towing up a long incline, or for several seconds getting a load moving, and could be hauling twice its regular curb weight, so it spends maybe 10% of its life at max output. An even larger truck, ie, a 550 or 650, will run at max power on low grade inclines, because it will be hauling a larger load, so it will spend maybe 25% or more of its life at max output. They derate to avoid the engine destroying itself and/or the rest of the drivetrain.
I have no idea if this applies to the OP's question and why a Mustang and F150 have different outputs, but it is my best guess.
For example, a Mustang can only run at max power for a few seconds, because beyond that, it will be going 100 mph and you let off. Plus, it isn't pulling a load. So it is only running at max output like, maybe 1% of its life. Conversely, a pickup truck might run at max power for a minute or 2 towing up a long incline, or for several seconds getting a load moving, and could be hauling twice its regular curb weight, so it spends maybe 10% of its life at max output. An even larger truck, ie, a 550 or 650, will run at max power on low grade inclines, because it will be hauling a larger load, so it will spend maybe 25% or more of its life at max output. They derate to avoid the engine destroying itself and/or the rest of the drivetrain.
I have no idea if this applies to the OP's question and why a Mustang and F150 have different outputs, but it is my best guess.
09-29-2014, 10:11 PM
#26
Senior Member
Truck intakes tend to have longer runners than car intakes, that lowers the torque curve for more low end power and reduces top end breathability which reduces peak horsepower.
