The Ford Ranger’s compact size and versatile platform make it a prime candidate for engine swaps. One popular choice is the Ford 2.5L Duratec engine, often sourced from the “Rest Of World” (ROW) Ranger. This article details a comprehensive engine swap process, highlighting key modifications and upgrades for a successful Ford 2.5 Engine Ranger transformation.
Leveraging the Honda S2000 Header Design
The Honda S2000, renowned for its high-revving naturally aspirated engine, boasts an exhaust port arrangement remarkably similar to the Duratec. While bolt holes differ, the port positions and shapes are strikingly alike. This similarity allows for adapting the S2000’s highly efficient long-tube stainless steel 4-2-1 header to the Duratec engine. The S2000’s OEM header is often considered superior to many aftermarket options, making it an excellent choice for this swap. Minor adjustments, such as heating and reshaping the center tubes and shortening the overall length, were necessary for optimal fitment. A Massive Speed Duratec exhaust flange was crucial for this adaptation.
Further modifications included grinding down a portion of the engine block’s bellhousing and using a low-profile button head cap screw for clearance. A V-band flange replaced the standard 2-bolt collector flange. Finally, the header was blasted and ceramic coated for durability and aesthetics.
ROW 2.5 Ranger Intake Manifold Advantages
The ROW 2.5 Ranger intake manifold offers several performance benefits over the USDM 2.3L counterpart. Its larger 2.5L ports, shorter runners, and larger plenum volume are ideally suited for the increased displacement of the 2.5L Duratec. While the ROW manifold utilizes a drive-by-wire (DBW) throttle body, adapters are available to facilitate integration with existing systems.
Initially, the engine will be run with the OEM 2.3L manifold for testing purposes, with plans to install the ROW manifold and document performance gains on a dyno.
Additional Enhancements: PCV, Clutch, and EGR
Performance enhancements extended beyond the intake and exhaust. The PCV valve was gutted to improve flow by removing the restrictive internal check valve. A new clutch and flywheel were installed, utilizing Massive Speed pressure plate hardware. An Energy Suspension transmission mount was used to enhance drivetrain rigidity. Finally, a Massive Speed EGR delete kit was installed.
Addressing Core Support Corrosion
The deteriorated core support, damaged from a previous collision and extensive corrosion, was removed by drilling out the spot welds. This removal simplified the engine and transmission installation process.
This detailed account of a Ford 2.5 engine Ranger swap provides valuable insights for enthusiasts undertaking similar projects. The careful selection of components, meticulous modifications, and attention to detail ensure a successful and powerful upgrade. Future updates will include dyno results and further enhancements.
