Here are some motor options, categorized by feasibility and complexity:
Relatively Straightforward (More Feasible):
* Mazda MX-6/626 2.5L KL-DE (or similar V6): This is probably the easiest swap. These engines are from the same era and platform, increasing the chances of finding readily available mounts and other parts. However, you'll still likely need custom wiring and possibly a different ECU. The 2.5L V6 is significantly larger than the original 2.0L, so you may need fabrication work. This engine may also require upgrades to your existing 5 speed transmission to survive it.
* Other Mazda engines (KL-series): Exploring other Mazda engines from the same generation (like variants of the KL-ZE or potentially even the FE engine) might offer better compatibility, though finding parts might still be tricky.
More Difficult and Complex:
* Modern Mazda engines (Skyactiv etc.): These are significantly more complex and would require extensive custom fabrication, wiring, and ECU tuning. The 24V system will need complete reworking, if even possible. This is a very advanced swap.
* Other manufacturers' engines: Using a motor from a different manufacturer (e.g., Honda, Toyota) would present a massive undertaking. You'd likely need custom engine mounts, a new wiring harness, a custom ECU setup, and potentially transmission adaptations. This is rarely practical.
* Electric motors: Converting to electric power is another option, but it's a very extensive and expensive project. You would need a new motor, controller, battery pack, and a complete reworking of the vehicle's electrical system.
Important Considerations:
* 24V Electrical System: The 24V system of your Probe is unusual. Many aftermarket parts and even some donor cars will use 12V, requiring significant modifications to the electrical system. This adds significant complexity to any swap.
* Transmission Compatibility: Your 5-speed transmission might not be compatible with every engine. You might need to source a different transmission, adding to the cost and complexity.
* Engine Mounts: You will almost certainly need custom engine mounts, regardless of the engine chosen.
* Wiring and ECU: Expect to need a custom wiring harness and potentially a standalone engine management system (ECU) to get the new engine running correctly.
* Exhaust System: You'll need a custom exhaust system.
Recommendation:
Start by researching Mazda engines from the same era. The 2.5L KL-DE V6 is a potential starting point but remains a significant project. Anything beyond a similar Mazda engine will require exceptional mechanical and electrical skills and a substantial budget. Before starting any swap, consult experienced mechanics and online forums specializing in engine swaps to get a realistic assessment of the work involved.
