Accor SIR-T H23A Vtec Engine:  Removed from a Honda Wagon in Japan.

The JDM H23A DOHC VTEC engine is a performance-oriented powerplant produced by Honda for the Japanese domestic market. Here’s an overview:

1. JDM H23A: This engine designation signifies that it’s primarily intended for vehicles sold in the Japanese Domestic Market (JDM). The “H23A” indicates the engine series and specific variant.  It fits the Honda Accord and Honda Prelude in the US.
2. DOHC: Stands for Double Overhead Camshaft. This means that the engine has two camshafts per cylinder head—one for operating the intake valves and one for the exhaust valves—allowing for precise valve control and enhanced performance.
3. VTEC: Variable Valve Timing and Lift Electronic Control. Honda’s VTEC technology optimizes engine performance by adjusting valve timing and lift for improved power delivery across different engine speeds. It enhances both low-end torque and high-end horsepower, resulting in a broad and responsive powerband.

The JDM H23A DOHC VTEC engine is renowned for its robustness, high-revving nature, and potential for aftermarket tuning and modifications. It’s commonly found in performance-oriented Honda models like the Prelude, where it delivers a potent combination of power and reliability, making it a favorite among enthusiasts seeking spirited driving experiences.

Actual engine pictures and actual engine compression test video.