Need advice for towing downhill....
Hello, I pulled me 30' fifth wheel up a 10 mile grade with 6-16% slopes. Like a cat that climbed the tree, I'm wondering the best way to get down. My trruck is an '01 F250 with an auto tranny. To keep...
Forum Discussion
marcsbigfoot20b27 wrote:
Car has average 9.5 to 1 compression ratio.
Diesels more like 17 to 1 and there is not throttle plate.
I have driven my friends F250 7.3 PSD with a manual 5 speed and if you got it up to 2500 rpms in 1st 2nd or 3rd and let off the gas pedal you would snap your neck.
Then your friends F250 has had an aftermarket exhaust brake installed and the lack of a throttle plate is the reason there is no compression braking on a diesel. There is nothing to restrict the movement of the air through the engine!
Mine will do that too if my exhaust brake is activated. I have an F250 with the 7.3 PSD and can tell you there is no compression braking on downhill, in town, or any other time other than a small bit - certainly not enough to hold back on a hill or mountain or to cause any neck pain! :B
Barney
