* Horsepower and Torque: These varied significantly depending on the application and whether it was a TBI (Throttle Body Injection), or MPI (Multi-Port Injection) system. You'd see figures ranging from roughly 230 hp to over 290 hp, and torque figures similarly varied.
* Fuel System: TBI (older, less efficient) or MPI (more modern, more efficient).
* Transmission: These engines were paired with various automatic and manual transmissions (e.g., 4L80E automatic was common).
* Carburetion (in some very rare instances): While mostly fuel injected, some very specific applications *might* have retained carburetion, though this would be unusual for a 1997 model year.
* Emissions: California and Federal emissions standards differed, leading to slightly different engine calibrations.
To find the precise specifications for a *specific* 1997 Chevy 454, you need to know:
* The vehicle it was in: (e.g., Chevy Silverado, Suburban, Tahoe, GMC Yukon) The exact model and trim level will significantly impact the engine's specifications.
* The engine's RPO code (Regular Production Option): This code, usually found on a sticker under the hood or in the glove compartment, will identify the exact engine variant.
With this information, you can then consult a factory service manual for that specific vehicle and engine code, or use online resources like GM's official archives (if accessible) to find the exact specifications.
