Here's why and what's involved in a conversion:
* Power Source: An electric pump is powered by the vehicle's electrical system, while a mechanical pump is driven by the engine's camshaft (or sometimes the distributor shaft). This means you'll need to remove the electric pump and its wiring, and install a mechanical pump with a drive mechanism compatible with your engine.
* Mounting: The mounting locations for electric and mechanical pumps are usually different. An electric pump is often in the tank or near the tank, while a mechanical pump is usually mounted on the engine block. You'll need to find a suitable mounting location and possibly fabricate brackets.
* Fuel Pressure Regulation: Electric pumps typically provide a higher and more consistent fuel pressure, often with a regulator built-in or nearby. Mechanical pumps usually have a lower and less consistent pressure, and may not require or include a pressure regulator. You'll need to consider if you need a pressure regulator and where it should be placed.
* Fuel Lines: The fuel lines will need to be rerouted to connect to the new pump location.
* Return Line: Many fuel injection systems use a fuel return line. The design of the return line can be different for mechanical versus electric systems.
* Engine Compatibility: The mechanical pump must be compatible with your engine's camshaft or distributor drive. You'll need to ensure the pump's drive gear matches the engine's drive shaft and has the correct specifications.
In short, this is not a simple bolt-on swap. It's a significant modification requiring mechanical aptitude, specific tools, and potentially custom fabrication. You'll likely need detailed diagrams or a repair manual specific to your vehicle's make, model, and year to navigate the complexities. It's also a potentially dangerous job if not performed correctly, involving flammable fuel. If you lack experience with automotive repair, it's highly recommended you consult a professional mechanic.
