I have had situations (running high speeds on Americas Interstate highways) where it was actually dangerous when I could not get my Sprinter over 83mph. This happens when trying to pass big Semi trucks, and I need the extra kick! The local Dodge service tech says there is nothing that can be done. Surely there is some answer to this dangerous problem. A Fuse? A Bypass of some sort? Etc.?
I sent the Engine Control Unit of my 2002 to http://www.speedtuningusa.com/. They claim to reprogram for increased HP and torque, and I think they are legitimate - I can tell the difference, especially with a trailer in the mountains.
Side benefit - no more speed limitation. Reached 105 mph in the middle of Nowhere, Wyoming. My better judgement convinced me to back off, but there was more in it.