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Home  »  Engine, Transmission, wheels/Tyres and Heating/Cooling  »  ENGINES and COMPONENTS  »  ROCKER ASSEMBLIES  »  ROLLER ROCKER SETS  »  ROLLER ROCKER SET TR2-4A WP STD RATIO

ROLLER ROCKER SET TR2-4A WP STD RATIO

RTR Upgrade
Part No:
RTR1195-1.55-1K
Price
£1137.97
Price Ex VAT @ 20%
£948.31

AVAILABLE This part is available to order

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TR2-4A roller rocker set. 1.55:1 ratio. Produced from aircraft specification aluminium. This complete kit includes a new shaft, billet machined aluminium pedestals incorporating rocker end supports, spacers and 8 roller rockers

No other modifications are required with the exception of the rocker cover. It will be necessary to use an aluminium rocker cover of the RTR1098 series or RTR1099 series as the rockers foul the standard tin cover.
Benefits include reduced value gear wear and less power loss as a result of low friction and more rigid construction. This kit retains the standard rocker ratio of 1.55:1. Kit part number RTR1195-1.65K increases the ratio to 1.65:1 giving 6% extra lift. When coupled with a few other modifications, such as exhaust system RTR2074K and possibly a gas flowed head, this extra lift will give a noticeable power increase, without the need to install a longer duration camshaft or increase the compression ratio. When a high lift camshaft is to be installed, use the 1.55:1 ratio kit, to avoid valve contact with pistons.
We also have economy sets available which include a new shaft and 8 roller rockers, which you build into a rocker assembly using your existing pedestals and springs/spacers, RTR1195-1.55K and RTR1195-1.65K. See below

GENERAL INFORMATION
There are two types of roller rocker sets, varying only in the ratio between camshaft lift and the resultant valve lift. The standard ratio for a Triumph TR2-4A and TR250, 5, 6 is 1.55:1 meaning that for every 1mm of camshaft lift, the valve will move 1.55mm.
1.55 :1 ratio is the standard ratio and will change nothing with respect to the engine set up but offers less resistance in the valve train bringing longer life to the affected components and to a very small extent increased power due to less resistance for the engine to overcome.
1.65:1 ratio increases the lift from the same cam, offers the same benefits and the 1.55:1 set and can increase the performance but this by no means certain as the condition of the engine and the components in it will affect this. Also, the extra lift has to be accommodated by the components in the valve train. A competent mechanic needs to check that the valve springs will not become coil bound, the rocker geometry is adjusted, the push are the right length and that there are no interferences between components.
After all this has proved satisfactory the engine will need re-tuning on a rolling road for best results.
Revington TR can undertake this work on their 400hp rolling road.



Engine, Transmission, wheels/Tyres and Heating/Cooling

17 plates in total

ENGINE (Petrol Injection Model): Block and Sump Engine Unit 9.5:1, Decarbonising Gasket Set, Engine Gasket Set, Cylinder Block, Cylinder Liner, Rear Oil Seal Housing, Oil Pressure Adjustment Details, Oil Pump Assembly, Oil Sump Assembly, Dipstick Assembly, Front Engine Plate, Engine Mounting Bracket Assy, Rear Engine Plate, Engine Lifting Eyes, Oil Pressure Switch

PLATE N - ENGINE (Petrol Injection Model): Block and Sump Engine Unit 9.5:1, Decarbonising Gasket Set, Engine Gasket Set, Cylinder Block, Cylinder Liner, Rear Oil Seal Housing, Oil Pressure Adjustment Details, Oil Pump Assembly, Oil Sump Assembly, Dipstick Assembly, Front Engine Plate, Engine Mounting Bracket Assy, Rear Engine Plate, Engine Lifting Eyes, Oil Pressure Switch

ENGINE (Petrol Injection Model): Crankshaft, Camshaft, Pistons and Flywheel Crankshaft Assembly, Fan Assembly, Flywheel Assembly, Camshaft, Timing Cover Assembly, COnnecting Rod Assembly, Piston Assembly, Drive Shaft Assembly, Pedestal Assembly - Distributor and Petrol Injection Metering Pump

PLATE Q - ENGINE (Petrol Injection Model): Crankshaft, Camshaft, Pistons and Flywheel Crankshaft Assembly, Fan Assembly, Flywheel Assembly, Camshaft, Timing Cover Assembly, COnnecting Rod Assembly, Piston Assembly, Drive Shaft Assembly, Pedestal Assembly - Distributor and Petrol Injection Metering Pump

ENGINE (Petrol Injection Model): Oil Filter Oil Filter Assembly (Full Flow)

PLATE W - ENGINE (Petrol Injection Model): Oil Filter Oil Filter Assembly (Full Flow)

ENGINE (Petrol Injection Model): Cylinder Head and Rocker Assemblies Cylinder Head Assembly 9.5:1, Valves, Push Rod, Tappet, Rocker Shaft, Rocker Cover Assembly

PLATE P - ENGINE (Petrol Injection Model): Cylinder Head and Rocker Assemblies Cylinder Head Assembly 9.5:1, Valves, Push Rod, Tappet, Rocker Shaft, Rocker Cover Assembly

ENGINE (Petrol Injection Model): Alternator Mounting

PLATE X - ENGINE (Petrol Injection Model): Alternator Mounting

ENGINE (Petrol Injection Model): Closed Circuit Breather

PLATE T - ENGINE (Petrol Injection Model): Closed Circuit Breather

ENGINE (Petrol Injection Model): Water Pump and Thermostat Water Pump Details, Thermostat Unit, Temperature Transmitter

PLATE R - ENGINE (Petrol Injection Model): Water Pump and Thermostat Water Pump Details, Thermostat Unit, Temperature Transmitter

ENGINE (Petrol Injection Model): Manifolds and Heater Pipe Exhaust and Inlet Manifold, Manifold Gasket, Throttle Spindles and Butterflies, Heater Pipe-solid under manifolds

PLATE S - ENGINE (Petrol Injection Model): Manifolds and Heater Pipe Exhaust and Inlet Manifold, Manifold Gasket, Throttle Spindles and Butterflies, Heater Pipe-solid under manifolds

CLUTCH: Clutch Assembly and Operation Clutch Cover Assembly - Borg and Beck, Driven Plate Assembly - Borg and Beck, Clutch Cover Assembly - Laycock, Driven Plate Assembly - Laycock, Clutch Throw Out Bearing, Clutch Operating Fork, Clutch Operating Shaft Assembly, Clutch Slave Cylinder Assembly (1

PLATE Y - CLUTCH: Clutch Assembly and Operation Clutch Cover Assembly - Borg and Beck, Driven Plate Assembly - Borg and Beck, Clutch Cover Assembly - Laycock, Driven Plate Assembly - Laycock, Clutch Throw Out Bearing, Clutch Operating Fork, Clutch Operating Shaft Assembly, Clutch Slave Cylinder Assembly (1")

GEARBOX: External Gearbox Unit, Gearbox Gasket Set, Gearbox and Clutch housing Assembly, Front End Cover, Gearbox Extension, Speedo Driven Gear and Bearing, Top Cover Assembly, Change Speed Lever Assembly, Gearbox Attachment Details, Rear Engine Mounting

PLATE Z - GEARBOX: External Gearbox Unit, Gearbox Gasket Set, Gearbox and Clutch housing Assembly, Front End Cover, Gearbox Extension, Speedo Driven Gear and Bearing, Top Cover Assembly, Change Speed Lever Assembly, Gearbox Attachment Details, Rear Engine Mounting

GEARBOX: Internal Mainshaft, Constant Gear Train Assembly, Constant Pinion Shaft, Countershaft, Reverse Spindle, Reverse Operating Lever Assembly

PLATE AA - GEARBOX: Internal Mainshaft, Constant Gear Train Assembly, Constant Pinion Shaft, Countershaft, Reverse Spindle, Reverse Operating Lever Assembly

OVERDRIVE: 'A' Type: Kit

PLATE CA - OVERDRIVE: 'A' Type: Kit

OVERDRIVE: 'A' Type: Unit Assembly

PLATE CB - OVERDRIVE: 'A' Type: Unit Assembly

PROPELLOR SHAFT AND ROAD WHEELS Propellor Shaft, Disc Road Wheel, Centre Lock Wire Wheels, Balance Weights, Wheel Trim - Road Wheels

PLATE AG - PROPELLOR SHAFT AND ROAD WHEELS Propellor Shaft, Disc Road Wheel, Centre Lock Wire Wheels, Balance Weights, Wheel Trim - Road Wheels

INDEPENDENT REAR AXLE Rear Axle Center Assembly, Crown Wheel and Pinion Assembly, Inner Axle Shaft, Rear Axle Shaft and Hub Assembly, Outer Axle Shaft Assembly, Sleeve Yoke and Yoke Shaft Assembly, Drive Flange and Hub Assembly

PLATE AE - INDEPENDENT REAR AXLE Rear Axle Center Assembly, Crown Wheel and Pinion Assembly, Inner Axle Shaft, Rear Axle Shaft and Hub Assembly, Outer Axle Shaft Assembly, Sleeve Yoke and Yoke Shaft Assembly, Drive Flange and Hub Assembly

RADIATOR Radiator Block Assembly, Overflow Bottle

PLATE AV - RADIATOR Radiator Block Assembly, Overflow Bottle

BODY AND FITTINGS: Heater Heater Details, Demister Outlet

PLATE BR - BODY AND FITTINGS: Heater Heater Details, Demister Outlet