1992 Ford B700?
Cargo Master
Joined: Feb 2003
Posts: 2,341
Likes: 5
From: Sacramento
See the link in my signature for the fuel screw(listed with the 84-92 DT466). It takes about 10-15 min. to do, and gives around 20-30hp(depending on how much you back out the screw). The bus is geared to hit the engine's gov as a speed limiter. You can tighten the gov springs to get more rpm, but that lowers fuel economy....but sure wakes em up. You can easily hit 3200 rpm without it grenading, just dont hold it there very long.
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Senior User
Joined: Feb 2006
Posts: 385
Likes: 0
From: Salem Oregon
See the link in my signature for the fuel screw(listed with the 84-92 DT466). It takes about 10-15 min. to do, and gives around 20-30hp(depending on how much you back out the screw). The bus is geared to hit the engine's gov as a speed limiter. You can tighten the gov springs to get more rpm, but that lowers fuel economy....but sure wakes em up. You can easily hit 3200 rpm without it grenading, just dont hold it there very long.
Normal operating RPM on our buses is about 2200 and that gets you rolling at a decent speed but it would be nice for some extra RPM for the hills.
Cargo Master
Joined: Feb 2003
Posts: 2,341
Likes: 5
From: Sacramento
The 89 F700(7.8) we have at work shifts at 2900. It's had the fuel screw adjusted, gov springs tightened 3 clicks, and timing advanced a smidge. They will usually go up in mpg, mostly because it doesnt need to be wound out all the time to get going. Even if you just hit the fuel screw only, you will like it! If it's still under a mechanic's care, see if they'll advance the timing 3-4 degrees from stock. Or, set it to at least 16*.
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