CNC Aluminum Racing Oil Catch Cans Billet Baffle Tank

Engineered Billet Aluminum Oil Separation Capabilities

Multi-tier internal vapor coalescing technology eliminating intake valve carbon fouling under extreme manifold boost.

We produce high-performance oil separation assemblies engineered for high-boost, high-RPM motorsport and aftermarket powertrain platforms. Every unit is subtractively machined from solid 6061-T6 aluminum billet using advanced 5-axis CNC aluminum machining services. This single-setup method eliminates the material porosity, thin-wall cracking, and structural separation risks typical of cast or stamped canisters.

Designed to isolate crankcase blow-by, suspended oil vapor, and condensation from entering the intake plenum, our CNC machined aluminum oil separator assemblies protect intake valves from carbon accumulation and stabilize crankcase pressure. We supply global Tier-1 aftermarket brands, race engineering teams, and wholesale distributors with complete manufacturing services, offering material batch traceability, precision-machined port geometries, integrated multi-tier internal baffle arrays, and resilient surface finishing.

Comprehensive Technical Specifications and Tolerances

Dimensional limits, pressure ratings, and certified alloy standards for motorsport applications.

High Boost Engineering Resolutions and Failure Analysis

Real-world dynamometer and cold-weather corrective actions developed to prevent trackside failures.

High-Boost Turbocharged Blow-By Pass-Through Elimination

· Failure Analysis: A customer reported high-speed oil mist pass-through in an early prototype baffled oil catch can for forced induction under 2.5 bar boost conditions. High-velocity crankcase gas bypassed the single flat internal baffle plate, flooding the intake charge pipe.

· Root Cause: Inadequate expansion volume and lack of flow velocity reduction allowed microscopic oil droplets to remain suspended in the air stream.

· Corrective Action: We redesigned the internal assembly from a flat plate into an interleaved, multi-tier drop-down baffle system. By forcing the gas through three successive velocity drops and 90-degree directional changes, heavy oil droplets coalesce on the lower plates while scrubbed air escapes through the top port. Oil separation efficiency increased by 90% in dynamometer validation.

Cold-Climate Condensation Emulsion and Channel Freezing Mitigation

· Failure Analysis: Open-loop vent-to-atmosphere canisters shipped to a Nordic distributor suffered cold-weather emulsification. Water vapor and oil sludge froze inside the outlet channel, blocking crankcase venting and causing crankshaft seal blowout.

· Root Cause: Static horizontal vent channels acted as condensation traps during sub-zero cold starts.

· Corrective Action: We modified the internal discharge port geometry with a 15-degree downward self-draining slope and integrated a serviceable micro-mesh condensation separator. We instituted an engineering protocol advising closed-loop recirculation for extreme cold-climate deployments, eliminating sub-zero field failures.

Single-Point CNC Thread Turning for Leak-Free AN10 Seal Integrity

· Failure Analysis: A racing parts wholesaler faced field leaks when mating aftermarket AN10 braided hose adapters to standard machined 7/8-14 internal threads under sustained engine bay vibration.

· Root Cause: Tapping tools produced minor thread lead error and axial misalignment against the sealing face (>0.03 mm runout), preventing the O-ring from seating evenly against the 45-degree chamfer.

· Corrective Action: We replaced thread-tapping with single-point CNC thread-turning performed in the same chuck setup as the chamfer and face milling. Port coaxiality and perpendicularity are maintained within ≤0.008 mm. Every batch is verified using calibrated AN10 thread gauges and pressurized oil-leak fixtures.

Dynamic Fluid Dynamics and System Architecture

Purpose-built internal geometry designed for closed-loop PCV integration and open-loop track ventilation.

Closed-Loop PCV Integration Versus Open-Loop Track Ventilation

Closed-loop configurations route scrubbed gas back into the intake tract, requiring minimal internal airflow resistance (ΔP<0.05 bar) to preserve factory ECU vacuum dynamics. Open-loop vent-to-atmosphere canisters are optimized for extreme boost, high crankcase volume, and high flow velocity, incorporating integrated oil-slosh protection and auxiliary splash-guard filters. We machine flow channels customized specifically to the client's chosen operating model.

Multi-Stage Kinetic Velocity Drop Separation Technology

Conventional catch cans use generic, static mesh filters that saturate and fail under sustained high-manifold pressure. Our multi-stage separation architecture uses variable internal chamber cross-sections. When high-pressure blow-by enters the inlet, it undergoes a sudden pressure drop in the primary expansion zone, triggering mechanical separation of liquid oil from air. The secondary and tertiary stages trap residual micron-level aerosols before the gas stream reaches the outlet port.

Turnkey Platform Integration for Motorsport Engine Architecture

We maintain machining programs and physical fitment gauges across dominant performance engine platforms. Our universal aluminum catch can with AN10 fittings features standardized port pitch and mounting bolt circles adaptable to chassis-specific engine bays. We offer dedicated brackets, customized hose routing bosses, and balance ports for high displacement platforms, including our ready-to-run aluminum oil catch can kit for LS engine platforms.

Structural Billet Machining Versus Die-Cast and Stamped Alternatives

Material fatigue resistance, thread burst limits, and structural integrity under sustained boost.

Six-Stage Metrology and Leak Verification Protocols

AS9102 dimensional verification, 5.0 bar pressure decay checks, and material lot traceability.

· Stage 1: Raw Material Validation: Optical Emission Spectrometry chemical assay verification for 6061-T6 bar stock to confirm chemical composition prior to cutting.

· Stage 2: First Article Inspection (FAI): Complete AS9102 dimensional verification on Zeiss Coordinate Measuring Machine metrology equipment before mass production release.

· Stage 3: CNC In-Process Metrology: Air-gauge bore verification for O-ring counterbores and thread plug gauging every 10 machined parts.

· Stage 4: Hydrostatic / Pneumatic Leak Testing: 100% batch testing where canisters are submerged under 5.0 bar pneumatic pressure to verify total sealing integrity.

· Stage 5: Surface Finish & Coating Inspection: Cross-hatch adhesion testing (ASTM D3359) and coating thickness measurement across all anodized lots.

· Stage 6: Final Clean-Room Cleanliness Protocol: Ultrasonic degreasing and particle wash testing to ensure zero machining chip or cutting fluid residue remains.

Demanding Motorsport and Powertrain Application Scenarios

High-load operating environments validated for maximum crankcase pressure stabilization.

Forced Induction Circuit Racing & Time Attack

Turbocharged and supercharged track vehicles running continuous high boost, requiring a high capacity racing oil breather tank and precision automotive CNC performance components to control crankcase surge.

Professional Drift & High-G Competition

High-lateral acceleration drift builds requiring a dual port billet aluminum catch can with baffle capture to prevent oil slosh and crankcase pressure buildup.

LS Engine Swaps & Restomod Builds

High-displacement V8 conversions utilizing an aluminum oil catch can kit for LS engine applications with vehicle-specific mounting brackets.

Direct-Injection (GDI) Intake Valve Protection

Daily-driven and tuned direct-injection vehicles utilizing a baffled aluminum catch can for turbocharged cars to prevent PCV-induced carbon build-up on intake valves.

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FAQs

 

 

01.Will installing a catch can cause a drop in crankcase vacuum or trigger check engine codes?

A properly sized closed-loop catch can maintains factory crankcase vacuum without setting check engine codes. Internal flow paths must exceed the surface area of the stock PCV line (ΔP<0.05 bar) to avoid impeding airflow while trapping blow-by vapors.

02.How does the internal baffle prevent oil mist from being pulled into the intake under boost?

Multi-tier CNC step plates force crankcase gases through a rapid expansion chamber and multiple direction changes. This sudden velocity drop causes heavy suspended oil droplets to coalesce and fall into the lower reservoir, allowing only scrubbed air to reach the outlet.

03.Why does oil-water emulsion freeze in catch cans during winter and how is it prevented?

Short trips in sub-zero weather generate excessive condensation that forms a milky emulsion. If trapped in flat channels, this sludge freezes and blocks ventilation. We machine sloped internal floor passages that route fluid into the sump away from critical vent paths.

04.What is the difference between single-port and dual-port configurations for high-horsepower engines?

Single-port cans handle standard inline-four PCV volumes. Dual-port configurations connect both cylinder heads or crankcase ports simultaneously on V6, V8, and high-boost applications. This doubles flow area, prevents localized pressure spikes, and eliminates oil seal blowout under sustained wide-open throttle.

05.Why do standard threaded AN fittings sometimes leak on billet cans, and how do you ensure a zero-leak seal?

Leaks occur when tapped threads have excessive lead error or non-concentric O-ring chamfers. We machine AN8, AN10, and AN12 ports using single-point CNC thread turning in a single setup, guaranteeing thread perpendicularity and providing a precise surface for Viton O-ring compression.

06.How often must the internal baffle assembly be cleaned, and how does the drain valve simplify service?

Baffle cores require solvent flushing every 15,000 to 20,000 miles. For routine fluid drainage, an integrated bottom ball valve allows complete emptying in seconds without tools or canister removal, preventing overfill conditions that cause oil re-ingestion into the intake.

Rapid 4-day prototyping and scalable volume production with comprehensive CMM reporting.

Stop blow-by contamination, fitting leakage, and delivery delays with our precision manufacturing infrastructure.

We deliver production-ready 6061-T6 billet aluminum catch cans built to your exact assembly drawings and performance criteria.

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