One of the questions most commonly asked about Bus to RV conversions is which engines are the best engines found in school (or other) buses. The short answer is "DT466 or 6CTA", but you probably want more than that, right? Maybe even a lot more. And I'm going to give it to you.
The fuel injection system on the classic 6.9 and 7.3 liter International-Navistar engine used in diesel fords from the 70s to the early nineties is relatively simple, but some confusion still remains about how it functions. The major components of the system are the lift pump, filter head and filter, fuel injection pump, fuel injectors, return system, selector valve, and the fuel tanks.
The fun, it burns. And it never stops, either.
In the last few days the Ford's had new batteries and some cable soldering work done, eliminating two of the four lead terminals and replacing them with the stamped steel lead-free style. The Mercedes, meanwhile, has had an '83 (or was it '84?) W123 300D turbo rebuilt and installed, along with a manual boost controller, W123 air filter housing which I still need to modify to take the W126 cold air intake, and VDO boost and voltage gauges. The voltage gauge is just something I had around, and it's taking up space until I get a VDO pyrometer to go in there; it's never a good idea to turn your turbo up without a pyro.
A close-up shot of the top of the injection jump showing the locations of components.