Common Swaps (relatively easy to moderately difficult):
* Chevrolet Small Block V8 (SBC): This is by far the most popular swap. Numerous kits and resources are available to help with the installation. Versions ranging from the 305 to the 383 are common.
* Buick V6: Several Buick V6s, like those found in the Grand National, fit relatively easily and provide a good balance of power and relative ease of installation.
* Pontiac V6: Similar to the Buick V6, several Pontiac V6s are used, often requiring less modification than V8 swaps.
* Ford Small Block V8: While less common than the SBC, Ford Small Blocks can be adapted, although it usually requires more fabrication.
* GM LS Series V8: This modern engine family is becoming increasingly popular due to its power and efficiency. However, this often requires more significant modifications and custom fabrication.
Less Common and More Challenging Swaps:
Almost any engine *could* theoretically be fitted with enough time, money, and fabrication skills. This includes larger V8s, turbocharged engines, and even some foreign engine options. However, these are generally much more difficult and require significant custom work.
Important Considerations:
* Weight Distribution: Adding a heavier engine significantly alters the Fiero's weight balance, potentially impacting handling. Careful consideration is required to maintain good handling characteristics.
* Cooling: The Fiero's cooling system might need upgrades to handle the increased heat from a more powerful engine.
* Transmission: You'll likely need a transmission capable of handling the increased torque and horsepower of the new engine. This often requires a transmission swap as well.
* Driveshaft: The driveshaft may need modifications or replacement to accommodate the new engine and transmission.
* Wiring: Adapting the wiring harness is a crucial aspect of any engine swap, often requiring custom work or specialized wiring harnesses.
In short, the possibilities are extensive, but the feasibility and complexity vary dramatically depending on the chosen engine. Research is crucial before starting an engine swap in a Fiero. Numerous online communities and forums dedicated to Fiero modifications can provide invaluable information and support.
