Radium Engineering Catch Can Kit - 89-05 Mazda Miata

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An oil catch can is essential on a performance vehicle to protect the engine from elevated levels of crankcase blow-by accumulated from high performance driving. Excess oil saturated air circulating back into the air intake stream can lead to degraded performance. Radium Engineering catch cans feature large 10AN ORB ports, a 4AN ORB drain port, 2-step oil separation baffling, and an O-ring sealed dipstick.

All catch can kits listed below are closed loop systems. they remove oil and sludge from the PCV gasses before it is routed to the engine to be burned. A closed loop system also promotes negative crankcase pressure for optimal performance. Furthermore, closed systems prevent unwanted oil vapors from entering the cabin. The dipsticks built into the catch cans allow easy inspection of accumulated fluid. No cutting, drilling or permanent modification to the vehicle is required.

Benefits
-Effectively raises the octane and increased engine performance from cleaner inlet air 
-Prevents oil buildup in the intake and intercooler system walls, throttle body, intake manifold, etc. 
-Excessive oil collection can be an indicator of a damaged engine.
-Lowers hydrocarbon emissions 
-Capacity: 7 fluid ounces each

20-0336-FL and 20-0337-FL

COMPATIBILITY
89-97 MX-5 Miata
98-05 MX-5 Miata
89-93 Eunos Roadster
Suitable for 1.6L and 1.8L engines

Theses catch cans mount using OEM holes and integrate perfectly with the surrounding components. NOTE: the factory air intake box cannot be used with these kits. Reference the installation pictures before ordering.

The kits are not designed for vent-to-atmosphere (VTA), thus are emissions and track legal. This closed loop system removes oil and sludge from the PCV gasses before it is routed to the engine to be burned. A closed loop system also promotes negative crankcase pressure for optimal performance. Furthermore, closed systems prevent unwanted oil vapors from entering the cabin. The dipsticks built into the catch cans allow easy inspection of accumulated fluid. No cutting, drilling or permanent modification to the vehicle is required.

If purchasing the single catch can kit, there is enough components to plumb it to the PCV or the crankcase side of the engine (see below for more info). If purchasing the dual catch can kit, all engine breather ports will be isolated for optimal performance. When using the catch can on the PCV side, it runs inline with the PCV (positive crankcase ventilation) valve and retains it's factory function. When the intake manifold pressure is close to or greater than atmospheric pressure, the PCV "check" valve closes and, thus, this hose experiences no flow. Conversely, the PCV hose will experience "metered" vacuum when the engine is idling, steady state cruising, and decelerating. This would normally draw unwanted crankcase vapor, unspent fuel, and oil sludge into the intake manifold immediately after a high load run. NOTE: Because Radium catch cans are pressure sealed, they are great for boosted applications so intake manifold connection is permitted.

When using the catch can on the crankcase side, it runs inline with the CCV port. At low loads it experiences atmospheric pressure, but when the engine is at high load (WOT), this hose will experience high flow out of the crankcase. This would normally lead to oil and sludge accumulation in the air filter intake pipe. If equipped, oil accumulation will occur in the intercooler which lowers the thermal efficiency properties of the heat exchanger and leads to decreased performance.

The 20-0336 Catch Can Kit, 89-05 Mazda MX-5 is shown below.

The 20-0337 Dual Catch Can Kit, 89-05 Mazda MX-5 is shown below. 

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COMPATIBILITY
98-05 MX-5 Miata
Not suitable for 89-97 MX-5 Miata or Eunos Roadster

These catch cans mount using OEM holes and integrate perfectly with the surrounding components. NOTE: Because of the room need for flip-up head lights, these kits are not comaptible with the 89-97 MX-5 Miata or Eunos Roadsters.

The PCV catch can kit routes crankcase gases inline with the PCV (positive crankcase ventilation) valve and retains it's factory function. When the intake manifold pressure is close to or greater than atmospheric pressure, the PCV "check" valve closes and, thus, this hose experiences no flow. Conversely, the PCV hose will experience "metered" vacuum when the engine is idling, steady state cruising, and decelerating. This would normally draw unwanted crankcase vapor, unspent fuel, and oil sludge into the intake manifold immediately after a high load run.

NOTE: Because Radium catch cans are pressure sealed, they are great for boosted applications so intake manifold connection is permitted.


If using the CCV add-on kit, the catch can secures to the bracket provided in the PCV catch can kit above. NOTE: the PCV catch can MUST be installed to use the CCV Add-On Kit.

For the CCV add-on kit, crankcase gases run inline with the crankcase vent port. At low loads it experiences atmospheric pressure, but when the engine is at high load (WOT), this hose will experience high flow out of the crankcase. This would normally lead to oil and sludge accumulation in the air filter intake pipe. If equipped, oil accumulation will occur in the intercooler which lowers the thermal efficiency properties of the heat exchanger and leads to decreased performance.

The dual catch can kit, simply includes both the PCV and CCV add-on catch can kits. Plumbing for the dual catch can kit is shown below.