* Specific Supercharger: Different superchargers (brands, models, sizes) offer varying levels of boost and efficiency. A smaller, less aggressive supercharger will yield less horsepower than a larger, more powerful one.
* Installation and Tuning: Proper installation and professional tuning are crucial. A poorly installed or tuned supercharger can actually *reduce* power or even damage the engine. Conversely, excellent tuning can maximize the gains.
* Supporting Modifications: Other modifications like upgraded fuel injectors, exhaust system, and possibly even internal engine components (rods, pistons) are often necessary to handle the increased power and prevent damage. These supporting mods will impact the overall horsepower gain.
* Condition of the Engine: The starting condition of the LS2 engine affects the potential for gains. A well-maintained engine will likely see better results than one that's already worn.
In short, while you might see advertised figures from supercharger manufacturers, these are often under ideal conditions and with supporting mods. Real-world gains can range from a conservative 100-150 horsepower up to potentially 200+ horsepower with a more significant supercharger setup and extensive supporting modifications. You'll need to research specific supercharger kits for the LS2 GTO and review dyno results (horsepower measurements) from those using similar setups to get a better idea of expected gains.
