liners DARTON MINI / PSA N14B16 EP6D

Darton MID sleeves are the best sleeves on the market due to their strength and fit. Their flanged tops align against each other while allowing Coolant to flow through them. (wet sleeves)
Many Cast Iron and Aluminum Production Blocks suffer from a design weakness in terms of cylinder stability due to poor mounting in the upper deck area. The "cast sleeve" manufacturing process allows for economy of scale in low power engines, but does not support high power, high boost, or larger bores.

Darton has designed a superior solution using a uniquely designed cylinder sleeve which, when conjoined and interlocked, creates a strong bridge of sleeve flanges held in tension, reinforcing the upper deck area and allowing for on-site replacement with what we call the Modular Integrated Bridge (MIDDLE). Additionally, Darton designs manage and improve water flow from Block to Head to promote cooling stability and all sleeves are a "wet" design.

Improving water flow in and around the flange area is possible through orifice water flow control engineering which we call "Swirl Coolant Technology". This process begins with specific technical designs of respective cylinder head and combustion chamber designs, then we promote increased water flow to areas of the upper sleeve area subject to the most heat. There is a different engineering model for each engine and cylinder design. While heat is generally considered to translate into energy, high resident heat in the combustion chamber can lead to detonation, the primary cause of engine failure at high power speeds. High rpm normally results in efficient exhaust of airflow, but in cases of misfires or incomplete flame spread, high cylinder pressures and temperatures are created. Our MID design COMPENSATES for this high heat absorption condition

In normal installation of dry sleeves, the cooling medium, water, must transfer the heat absorption through the Block material and the sleeves, which may be different metals. When dry sleeves are pressed with an interference fit, the interface of the materials is not perfect, further exacerbating heat transfer. This thermal conductivity is inefficient and as more heat is generated, the combustion process is compromised. Even in wet muff designs of the past, water is never treated or circulated effectively between the Block and the Head to ensure maximum heat dissipation into the combustion chamber. A certain amount of standing water is inherent in cast iron or aluminum open or closed deck engine blocks. It's like pouring water into a funnel: there's really no flow or speed until the water comes out of the faucet. In the case of Blocks and Heads, the for ports are designed for ease of pouring and not for efficient flow. Now, with Darton's "MID" swirl cooling technology, the cooling fluid is routed and directed to significantly improve heat transfer where it is needed most, in the upper cylinder wall/flange area.

The Darton Pro-Sleeve kit is available for many series of 4, 6 and 8 cylinder import and domestic engines and offers maximum bore sizes and boosting potential. The advantages of our Pro-series kits are:

Integral block resistance improved
Improved cooling
Possibility of replacement by "wet sleeve"
Increased Power Production Potential
Superior oil and compression control
Street or strip application
Kits can be installed by your local machine shop
FULL installation manual with every kit sale
High boost and power potential Superior cylinder sealing and ring wear
Darton bulletproof ductile iron, tensile strength of 130.000 psi