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Brand: C.OEFT
OE numbers: ASBG-DQ.RAM 5.7/6.4L-4
Product Name: Timing Chain Kit
Compatible model: /
Product status: New
Number of teeth on the product: /
Product weight: 0.78kg
Packaging size: 40*40*10cm
Product packaging: Neutral Packaging
Car Series: American
Car Type: For Dodge
As the "power transmission backbone" of Dodge’s 5.7L/6.4L HEMI engines, the kit’s components work in tandem to maintain mechanical timing accuracy—essential for V8 engines’ balanced power output:
·Timing Chains & Sprockets: Connect the crankshaft to the dual camshafts (HEMI engines use OHV overhead valve design with cam-in-block, requiring long-chain transmission). They strictly maintain a 1:2 rotation ratio (four-stroke engine standard), ensuring the intake/exhaust valves open/close at the exact moment corresponding to piston movements (intake → compression → power → exhaust). For HEMI engines, this precision prevents "valve-piston collision" (a catastrophic failure that bends valves and damages piston tops)—especially critical when the 6.4L engine is revved to high speeds or the 5.7L engine is under heavy towing load.
·Hydraulic Tensioners: Real-time compensation for chain stretch (caused by high torque and heat). The dual-chamber design provides rapid tension adjustment (response time <0.1 seconds) during sudden load changes (e.g., RAM 3500 accelerating with a trailer), avoiding "chain skip" (which disrupts timing, leading to misfires, reduced power, and increased fuel consumption).
2. Protecting HEMI Engines from High-Temperature & High-Load Damage
·Heat Resistance for Prolonged Heavy Use: The ceramic-coated guides and aluminum alloy tensioners resist thermal degradation at 250℃, preventing guide melting or tensioner seal failure—common in low-quality kits when HEMI engines are used for prolonged towing (e.g., 4+ hours of highway towing) or track driving (30+ minutes of high-speed laps).
·Torque Resistance for V8 Power: The 1,800 MPa alloy steel chains withstand the 6.4L HEMI’s 644 N·m peak torque without stretching, avoiding timing drift that could cause "HEMI tick" (a common issue from chain slack) or premature wear of camshaft lobes and lifters.
3. Optimizing Power Output & Fuel Efficiency
·Stable Power Delivery: The low-friction chain and precision sprockets ensure 100% power transfer from the crankshaft to camshafts, preserving the 5.7L HEMI’s 395 HP and 6.4L HEMI’s 485 HP rated power. This avoids power loss (up to 15% with worn timing components) that affects towing capacity or acceleration performance.
·Fuel Efficiency Improvement: By maintaining precise timing, the kit reduces incomplete combustion caused by valve timing errors. Tests show a 2%-3% improvement in highway fuel economy for RAM 1500 5.7L (from 10.2 L/100km to 9.9 L/100km)—a meaningful saving for owners with high annual mileage.
·Engine-Specific Calibration for HEMI Power Units: Strictly developed based on the structural parameters of Dodge’s 5.7L (395 HP/556 N·m) and 6.4L (485 HP/644 N·m) HEMI V8 engines. The kit’s chain length (168 links for 5.7L, 172 links for 6.4L), sprocket tooth profile (HEMI-exclusive involute design), and tensioner oil pressure parameters (10-15 psi operating range) are 100% matched to Dodge’s OEM standards. It avoids issues like "chain-sprocket mismeshing" or "tensioner underperformance" common in universal V8 kits, which could lead to timing failure.
·Full Coverage of HEMI Timing System Needs: The kit includes all critical components for HEMI engine timing overhauls: 2 primary timing chains (for crankshaft-camshaft transmission), 4 hydraulic tensioners (dual for each cylinder bank to handle uneven load), 6 heat-resistant guides (upper/lower for intake/exhaust camshafts), and 2 precision camshaft sprockets. This eliminates the need for separate sourcing of HEMI-specific parts, ensuring system-wide compatibility.
·Plug-and-Play for Dodge Heavy-Duty/Permformance Models: Optimized for Dodge’s usage scenarios—whether for the RAM series’ heavy towing (up to 12,700 lbs for RAM 2500) or the Challenger’s high-speed performance (0-60 mph in 4.3 seconds for 6.4L Scat Pack). No modifications to the engine block or timing cover are required, and installation aligns with Dodge’s factory service procedures, reducing repair time by 35% for professional technicians.
2. Reinforced Materials for HEMI’s High-Torque & High-Temperature Demands
·High-Strength Alloy Steel Timing Chains: Crafted from chrome-molybdenum-vanadium alloy steel (4140HM)—the same material used in Dodge’s OEM HEMI performance parts—with a 5-step manufacturing process: forging → precision rolling → carburizing quenching (surface hardness HRC 62-65) → nitriding (wear resistance +30%) → laser peening (fatigue life +50%). Tensile strength reaches 1,800 MPa, enough to withstand the 6.4L HEMI’s peak torque of 644 N·m without stretching or tooth deformation (a common failure point in low-grade kits for heavy towing).
·High-Pressure Hydraulic Tensioners with Pressure Relief Valves: Equipped with Dodge HEMI-exclusive dual-chamber hydraulic tensioners (upgraded from single-chamber OEM versions). The tensioners feature a built-in pressure relief valve to prevent over-tensioning during cold starts (a major cause of chain wear) and maintain stable tension (12 psi constant) under high loads (e.g., RAM 3500 towing heavy trailers). The tensioner housing is made of heat-resistant A380 aluminum alloy (instead of plastic), tolerating engine compartment temperatures up to 250℃ (common in HEMI engines during prolonged high-speed operation).
·Ceramic-Coated Heat-Resistant Guides: The guides adopt PA66+GF50 engineering plastic (50% glass fiber reinforcement) with a 0.1mm thick ceramic coating. This reduces friction with the chain by 40% (compared to OEM plastic guides) and resists thermal aging at 240℃—critical for preventing guide cracking in 6.4L HEMI engines, which often reach 230℃ during track days or heavy-duty work.
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