The 1990 RS Camaro came standard with a relatively small V6. Therefore, any significant engine swap would be required to get something truly "bigger." Popular swaps include:
* LS Series Chevrolet Engines: These are very popular swaps due to their relative ease of installation (compared to others), availability, and power potential. You could fit a variety of LS engines, from a small-block LS1 to a larger LS6 or even an LS7, though significant fabrication may be required for the larger options.
* Big Block Chevy (e.g., 454, 502): These are significantly larger and more powerful than the LS series, but require extensive modifications, custom fabrication, and potentially chassis reinforcement. They represent a truly substantial undertaking.
* Other V8s: Other V8 engines from various manufacturers could potentially fit, but these would generally involve significant custom work and likely wouldn't be as straightforward or cost-effective as an LS swap.
In short, there's no definitive answer. An LS-series engine is likely the practical upper limit for a relatively manageable swap, while significantly larger engines are achievable with substantial time, effort, and money invested in custom fabrication. You'd want to consult with Camaro specialists and engine swap communities for specific recommendations on what will fit comfortably and reliably into your car.
