The CSF Porsche 914-6 OEM+/High-Performance Engine Oil Cooler represents a significant advancement in engine cooling technology for classic Porsche enthusiasts and restoration professionals. Drawing upon the successful design foundation of the CSF 911/930 Turbo Engine Oil Cooler (CSF #8242), this product embodies over two years of rigorous development and multiple prototype iterations. Its world debut at Rennsport Reunion 2023 was met with widespread acclaim, underscoring its importance within the air-cooled Porsche community.
Owners and restorers of the Porsche 914-6 are well aware of the inherent challenges posed by the original oil cooler design, which was mounted directly on the engine block of the flat-six motor. As 914-6 engine swaps and conversions gain popularity, the demand for a reliable, high-performance oil cooler that maintains an authentic appearance has never been greater. The CSF solution addresses these needs by combining modern engineering with respect for the original design ethos.
The original Behr oil cooler, designed in the 1960s, was effective for its time but has not aged well. Refurbishment of original units through ultrasonic cleaning often leads to leaks due to brittle materials and corrosion removal that exposes previously hidden flaws. Additionally, the OEM cast base plate is prone to warping and porosity, compromising seal integrity and leading to oil leaks. New replacement units from Porsche’s “Porsche Classic” catalog have also demonstrated reliability issues, with reports of leaks occurring within months of installation. CSF’s OEM+ oil cooler offers a modern, durable alternative that surpasses both original and newly sourced OEM units in performance and longevity.
Development of the 914-6 Engine Oil Cooler was a collaborative effort involving CSF and leading Porsche engine experts at SV Auto. Their extensive experience with classic Porsche engines and restorations provided critical insights that informed the cooler’s design and construction. Additionally, Brian Day of Euro Parts West, a long-standing CSF R&D partner and dealer, played an instrumental role in refining the engineering to ensure optimal functionality and fitment.
Product Details
Design & Engineering
The CSF cooler addresses the shortcomings of the original Behr design by integrating modern materials and manufacturing techniques. Ultrasonic cleaning of vintage coolers often results in leaks due to the fragile nature of the aged components. Moreover, the original cast base plate is susceptible to warping and porosity, which adversely affects seal performance. CSF’s design replaces the cast base plate with a CNC-machined billet aluminum plate, offering a perfectly flat and robust mounting surface that resists deformation over time.
Reports of new OE coolers leaking prematurely highlight the necessity for a superior aftermarket solution. CSF’s OEM+ cooler incorporates a modern tube and fin core engineered for higher flow rates, reduced pressure drop, and enhanced durability. This core design features seven cooling tubes and eight rows of fins, delivering approximately 10% greater efficiency than new OE units and up to 25% more than used coolers.
Attention To Detail
CSF’s meticulous approach to the 914-6 Oil Cooler design involved comprehensive research and development, including 3D scanning of flat-six engine blocks and OE coolers. This enabled precise fitment and identification of areas for improvement. Brian Day’s expertise was invaluable in understanding the oil cooling system’s nuances, facilitating the creation of a cooler compatible with a broad range of 914-6 models.
Every component of the cooler was scrutinized, from core strength to oil flow dynamics, ensuring that the final product optimizes performance without compromising reliability.
New to the Core
The core of the CSF cooler utilizes a state-of-the-art tube and fin design, specifically engineered for the 914-6 application. This core supports higher oil flow with less pressure drop compared to the original, enhancing cooling efficiency and engine protection. To further increase durability, CSF incorporated support bars between the tubes, elevating the burst pressure tolerance to 290 psi (20 bar) without leakage.
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