FRED
I wonder if anyone out there is driving a FRED (front engine diesel). We drove a 2007 Tiffin Allegro with a front engine Cummins. It wasn't as loud as I thought it would be. It has a lot to offer and ...
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Yikes, if I was limited to a top speed of 75 mph, I'm not sure what I would do.
Its also a very good example of why you can't downshift to gain more torque at the wheels like you would with a gas engine. Whatever power you have in top gear, that is all you have, unless you loose a bunch of speed. Its also why it needs a 6 speed, so that once you loose speed, a downshift does not change the ratio that much, so it does redline the engine. But with less difference in ratio means a lower increase of torque at the wheels. It also shows why people like diesels, because all 300 ponies are available in top gear, so it does not need to down shift as often. (its a good thing, because it can't) A gas engine does not have all of its ponies available, until it downshifts. But when it does downshift, it has 65 more ponies than the diesel so when the torque is multiplied from a downshift, all of those extra ponies are applied to the drive wheels.
Its also a very good example of why you can't downshift to gain more torque at the wheels like you would with a gas engine. Whatever power you have in top gear, that is all you have, unless you loose a bunch of speed. Its also why it needs a 6 speed, so that once you loose speed, a downshift does not change the ratio that much, so it does redline the engine. But with less difference in ratio means a lower increase of torque at the wheels. It also shows why people like diesels, because all 300 ponies are available in top gear, so it does not need to down shift as often. (its a good thing, because it can't) A gas engine does not have all of its ponies available, until it downshifts. But when it does downshift, it has 65 more ponies than the diesel so when the torque is multiplied from a downshift, all of those extra ponies are applied to the drive wheels.
