Easier Swaps (Less Modification):
* GM LS Series (LS1, LS2, LS3, etc.): These are extremely popular swap choices for a reason. They're relatively plentiful, powerful, relatively fuel-efficient (compared to older big blocks), and readily available aftermarket support exists. However, this is likely the most expensive option, requiring custom mounts, wiring harnesses, and potentially transmission upgrades. The biggest hurdle is often the ECU (computer) integration and getting it to play nicely with your car's existing systems.
* 3800 Series II Supercharged: This is a GM engine already found in many GM cars of that era, making the swap potentially simpler. The supercharger provides a good performance boost without requiring extensive modifications. This would still need custom mounts and likely some wiring work, but it's a potentially easier and cheaper option than an LS swap.
More Difficult Swaps (More Modification):
* Small Block Chevy (SBC) (350ci): A classic choice, offering huge aftermarket support. However, this will require significant fabrication, including custom motor mounts, possibly modifying the firewall and potentially the transmission tunnel.
* Ford Modular Engines (Coyote, etc.): Modern and powerful, but extremely involved swap. You would need custom everything, including mounts, wiring, and potentially transmission adapters. This would be a very complex and expensive undertaking.
Factors to Consider:
* Budget: LS swaps can be expensive. The 3800 supercharged is a more affordable mid-range option, while SBC or Modular swaps are very expensive projects.
* Skill Level: An LS swap can be done by someone with moderate mechanical skills with the help of aftermarket kits, but the others would require significant fabrication and electrical expertise.
* Drivetrain: Will you keep the existing transmission? Many swaps necessitate transmission upgrades for durability and performance matching. This adds cost and complexity.
* Emissions: Consider your local emission regulations. Older engines may not meet current standards. Some states have stringent rules regarding engine swaps.
Recommendation:
For a relatively straightforward, powerful, and reasonably priced upgrade, the 3800 Series II Supercharged engine is a strong contender. It utilizes readily available parts and offers a good performance boost. However, if you're looking for the ultimate performance and have a substantial budget and mechanical skills, the LS swap is the most common and well-supported route.
Before committing to any engine swap, thoroughly research the specifics for your 1989 Oldsmobile Delta 88. Consult forums and online communities dedicated to car swaps. Finding a local shop specializing in engine swaps can also be valuable for guidance and potential assistance.
