Here's why:
* Engine Codes: The 89 Prelude used the B20A engine series, while the 94 Prelude used the H22A engine series. These are different engines with different mounting points, transmissions, and overall dimensions.
* Electronics: The 94 Prelude has more advanced electronics than the 89 model, including a different ECU and wiring harness.
* Transmission Compatibility: The transmissions for the 89 and 94 Preludes are not interchangeable.
While you might be able to technically fit an 89 B20A engine in a 94 Prelude, it would be a huge project:
* Massive modifications: You would need to fabricate custom mounts, modify the firewall, and potentially the entire engine bay.
* Wiring difficulties: The electronics are completely different. You'd need to rewire the entire car or find a way to make the 89 engine's electronics work with the 94 Prelude's system, which is incredibly complex.
* Potential for problems: Even if you manage to make it fit, there's no guarantee it would work properly. You could run into various compatibility issues with the transmission, engine management system, and other components.
It's simply not worth the time, effort, and potential problems. If you want to swap engines in your 94 Prelude, it's recommended to choose a compatible engine like the H22A series from another Honda vehicle.
