The 1994 Blazer engine is a Vortec 4300, while the 1995 Sonoma engine is a Vortec 4300 TBI. The TBI (Throttle Body Injection) system on the 1995 Sonoma engine uses a single injector to spray fuel into the throttle body, while the Vortec 4300 engine on the 1994 Blazer uses a multi-port fuel injection system with individual injectors for each cylinder. This difference in fuel injection systems can affect the performance and efficiency of the engine.
Another key difference between the two engines is the compression ratio. The 1994 Blazer engine has a compression ratio of 9.2:1, while the 1995 Sonoma engine has a compression ratio of 9.5:1. This means that the 1995 Sonoma engine has a slightly higher compression ratio, which can result in increased power and efficiency.
Finally, the 1994 Blazer engine has a maximum output of 200 horsepower at 4000 RPM, while the 1995 Sonoma engine has a maximum output of 205 horsepower at 4400 RPM. This means that the 1995 Sonoma engine has a slightly higher power output at a slightly higher RPM.
In terms of interchangeability, the 1994 Blazer engine and the 1995 Sonoma engine are not directly interchangeable. This is because the two engines have different engine management systems and different engine mounts. However, it is possible to swap one engine for the other with some modifications.
Overall, the 1994 Blazer 4.3L engine and the 1995 Sonoma 4.3L engine are very similar, but there are some key differences between the two. These differences can affect the performance, efficiency, and interchangeability of the engines.
