What engines years and models will interchange with supercharged 1997 Buick Regal?

The 1997 Buick Regal with the supercharged engine used a unique powerplant. It's not a straightforward swap with other engines. The supercharged 3.8L Series II (commonly called the "SC") is fairly specific to that year and a few others, and even then, there are significant differences that make a direct swap very difficult.

Here's why interchanging is complicated:

* Supercharger Integration: The supercharger itself is a major part of the engine's design and isn't easily transferred. The intake manifold, fuel system, and computer calibration are all tightly integrated with the supercharger.

* Engine Management System: The PCM (Powertrain Control Module) is specifically programmed for the supercharged engine. Using a different engine would require extensive rewiring, and potentially a completely new PCM.

* Mounting and Physical Differences: Even if you could find a similar naturally aspirated 3.8L, the mounting points and accessory placements might not align perfectly.

In short: While some parts might be interchangeable between the 3.8L series II engines across different years and models (like some sensors or smaller components), a complete engine swap from a naturally aspirated Regal or even another GM car with a 3.8L would be a massive undertaking, requiring significant custom fabrication and potentially professional tuning. It's generally considered far more practical and cost-effective to rebuild or replace the supercharged engine itself, rather than attempting a full swap.

If you are considering a swap, it's best to consult with a Buick specialist or experienced mechanic to assess the feasibility and complexity before you start. They can give you a much more accurate picture of what's involved and the potential costs.