Quote:
Originally Posted by Ford Assassin
In for opinions...
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Instead of bumping an oldie... I'd start a new thread.
I pull a 28 foot 5th wheel with a 6.0L/4L80E combo in my 2006 Silverado K2500. Gas mileage is around 10mpg while towing if i'm lucky. Usually closer to 8 or 9. The 6.0L needs RPM just like a Gen 1 small block to pull with. I'm tapped out at 3,500 RPM's on grades and pulling at 53mph. If I ease into it too much, it skyrockets to 6,500 RPM's on a downshift. It's a delicate dance on grades with this combo. Mine is a stock naturally aspirated 6.0L. If you're not trying to pull grades at 70 MPH and don't mind the bellering of a 3,500 RPM pull than this is the engine/transmission combo for you. Adding a turbo or supercharger isn't going to do anything but create more heat, in an already stressed pulling environment. Also downhill engine braking with a NA 6.0L is horrible.
I'm happy with what I have. But if I was pulling a bigger trailer or any kind of decent payloads up and down grades... I'd own a Dirtymax.
I'd use proven stump pulling power of a BBC any day. Upgrading the TH400 to an overdrive 4L80E, would be nice too.
Gary