* TBI (Throttle Body Injection): This is a simpler, less sophisticated system. Fuel injectors are located *inside* the throttle body. It's generally less efficient and produces less power than TPI. Think of it as a more rudimentary, single-point injection system.
* TPI (Tuned Port Injection): This is a more advanced system. It uses individual fuel injectors located *in each intake runner* of the cylinder heads. This allows for more precise fuel delivery to each cylinder, resulting in better performance and fuel efficiency compared to TBI.
In short: a 1992 Camaro with TPI will generally have more power and better throttle response than one with TBI. TPI was considered a higher-performance option.
