Sentences with phrase «rpm rocker arm»
At the switch point a solenoid is actuated that allows oil pressure from a spool valve to operate a locking pin which binds the high RPM rocker arm to the low RPM ones.
https://en.m.wikipedia.org/ Not exact matches
2005 Honda Civic won't go above 4,000 RPM — CEL throwing P2646 («A» Rocker Arm Actuator System Performance / Stuck Off Bank 1)
The high - profile camshaft lobe which normally contacts the secondary exhaust rocker arm alone during low - RPM engine operation is able to move both exhaust rocker arms together which are locked as a unit.
In basic form, the single cam lobe and follower / rocker arm of a conventional engine is replaced with a locking multi-part rocker arm and two cam profiles: one optimized for low - RPM stability and fuel efficiency, and the other designed to maximize high - RPM power output.
The primary exhaust rocker arm contacts a low - profile camshaft lobe during low - RPM engine operation.
The term «primary» does not refer to which rocker arm forces the valve down during low - RPM engine operation.
Part Number: 19260835 Engine Type: LS - Series Small - Block V - 8 Displacement (cu in): 454 cu in (7.4 L) Bore x Stroke (in): 4.185 x 4.125 (106.3 x 104.8 mm) Block (P / N 19244057): LSX cast iron with 6 - bolt cylinder head attachment Crankshaft (P / N 19244018): 4340 forged steel Connecting Rods (P / N 19166964): 4340 forged steel Pistons: (P / N 19166958): 4032 forged aluminum Camshaft Type (P / N 19166975): Mechanical roller Camshaft Lift (in):.738 intake /.738 exhaust Camshaft Duration (@.050 in): 250 ° intake / 270 ° exhaust Cylinder Heads (P / N 19166979): Drag race cylinder heads 6 - bolt LSX aluminum Valve size (in): 2.250» x 6.370» intake 1.625» x 6.400» exhaust Compression Ratio: 13.1:1 Rocker Arms (P / N 19201808): Shaft mounted with needle bearing fulcrum and tip Rocker Arm Ratio: 1.9:1 Recommended Fuel: Race fuel (110 octane minimum) Maximum rpm: 7,100 Reluctor Wheel: 58X Balanced: Internal
Engine Type: Chevy Small - Block V - 8 Displacement (cu in): 350 Bore x Stroke (in): 4.000 x 3.480 Block (P / N 10105123): Cast - iron with 4 - bolt main caps Crankshaft (P / N 14088526): Nodular iron Connecting Rods (P / N 10108688): Powdered metal steel Pistons (P / N 12514101): Cast - aluminum Camshaft Type (P / N 24502476): Hydraulic flat tappet Camshaft Lift (in):.435 intake /.460 exhaust Camshaft Duration (@.050 in): 212 ° intake / 222 ° exhaust Cylinder Heads (P / N 12558060): Vortec iron; 64cc chambers Valve Size (in): 1.940 intake / 1.500 exhaust Compression Ratio: 9.1 nominal Rocker Arms (P / N 10089648): Stamped steel Rocker Arm Ratio: 1.5:1 Water Pump (P / N 88894341): Cast iron, long - style Flexplate (P / N 14088765): 12.750» Recommended Fuel: 92 octane Ignition Timing: Base 10 ° BTDC, 32 ° Total Maximum Recommended rpm: 5,500 Balanced: External
When the engine is operating below 6000 - 7000 rpm (dependent on year, car, and ECU installed), the lower lobe is operating the rocker arm and thus the valves, and the slipper - follower is freewheeling next to the rocker arm.
Whereas traditional VTEC operation changes valve opening duration based on higher oil pressure during high rpm operation at one side of the valvetrain's rocker arms, the Civic's i - VTEC system can switch valve timing duration at low rpm and low oil pressure using two hydraulic actuators on both sides of the intake rocker arm.
From a mechanical standpoint, the three stage VTEC switching capabilities are made possible a rocker arm design with three hydraulic circuits that accommodates a) low rpm VTEC switching on each cylinder's intake and exhaust valve and b) high speed switching on the [intake] valve.
Titanium valves, ultra — light weight rocker arms with a diamond — like coating and a fully integrated lower crankcase that reduces pumping losses at high RPMs combine to provide the driver with overwhelming acceleration right up to the 9,000 rpm redline.
The VTEC portion of the system hydraulically adjusts the intake valves» rocker arms for lift and duration to help optimize engine efficiency for low - and high - RPM ranges.