* Specific Supercharger: Different superchargers offer varying levels of boost pressure. A smaller, less aggressive supercharger will add less horsepower than a larger, more powerful one. Brands like Whipple, Vortech, and Roush offer different models with different output capabilities.
* Tuning: Proper tuning of the engine's computer (ECU) is crucial to safely and effectively utilize the added boost. A poorly tuned supercharger setup can actually *reduce* power or even damage the engine. A good tune will maximize the horsepower gains.
* Supporting Modifications: Other modifications, such as upgraded fuel injectors, fuel pump, and exhaust system, are often necessary to support the increased power output of a supercharged engine. These upgrades further influence the final horsepower increase.
* Condition of the Engine: The health and condition of the naturally aspirated engine before the supercharger installation will affect the outcome.
In general, you can expect a gain somewhere in the range of 50-150 horsepower with a supercharger and proper supporting modifications. However, some high-end supercharger kits on a well-maintained engine could push closer to the upper end of that range, while less aggressive setups or neglect of supporting mods might yield results closer to the lower end.
To get a precise estimate, you need to specify the exact supercharger kit being used and the level of supporting modifications planned. Looking at dyno results from similar setups on the same engine is your best bet for a realistic expectation. You can often find these results on forums and websites dedicated to Mustang modifications.
