Difference between various universal catalytic converter

A clam-shell universal catalytic converter and a spun universal catalytic converter are two different designs commonly used in automotive catalytic converters. Here's a breakdown of their differences:

1. Design:

1) Clam-Shell Universal Catalytic Converter: This design consists of two separate halves that are joined together to form a shell-like structure. The clam-shell converter typically has a round or oval shape. It is made up of two stamped metal shells that enclose the catalytic substrate inside.

2) Spun Universal Catalytic Converter: The spun design features a cylindrical shape and is made from a single piece of stainless steel tubing that is tightly wound or spun into a honeycomb-like pattern. The catalytic substrate is coated onto the inner walls of the honeycomb structure.




2. Construction:

1) Clam-Shell Universal Catalytic Converter: The clam-shell design involves welding or crimping the two halves of the converter together. This construction method provides structural stability and ensures the catalytic substrate is securely contained within the converter.

2）Spun Universal Catalytic Converter: The spun design is created through a process known as hydroforming. The stainless steel tubing is shaped into a cylindrical form with a honeycomb structure using a spinning or winding technique. This construction method offers excellent durability and resistance to thermal stress.




3. Performance:

1）Clam-Shell Universal Catalytic Converter: The clam-shell design allows for a larger catalytic substrate surface area, which can enhance the converter's overall efficiency in reducing emissions. It also provides good flow characteristics, which can help maintain engine performance.

2）Spun Universal Catalytic Converter: The spun design has a higher cell density within the honeycomb structure, allowing for more contact between the exhaust gases and the catalytic substrate. This design can provide efficient emission reduction while minimizing exhaust pressure buildup, thereby promoting better engine performance.




4. Installation:

1）Clam-Shell Universal Catalytic Converter: The clam-shell design often requires welding or clamping at the joints to ensure a secure installation. It may require additional components, such as gaskets or flanges, to properly connect it to the exhaust system.

2）Spun Universal Catalytic Converter: The spun design is typically designed with built-in flanges or ends that facilitate easier installation. It can be installed using various clamping or welding methods, depending on the specific configuration.