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Engine statistics in a nutshell
BBR.-GTi modified "K" Series Rover 1800cc 4 cylinder 16 valve
- Bore = 78 mm
- Stroke = 89 mm
- SV/cyl = 425.27 cc
- Total SV = 1,701.09 cc
- CR = 8.5:1
Turbocharged
Max power output = 305 bhp at 6,800 rpm
Max torque = 285 lbs ft at 4,250 rpm
Torque spread min 235lbs ft at 3,500rpm to 6,800rpm
Max engine speed = 7,200rpm
Max boost = 1.3 bar (2.3 bar abs.)
Schedule of engine improvements and chassis installation modifications
* Part One, BBR new engine parts and alterations
- Forged, nitrided steel counterbalanced crankshaft.
- Stronger, heavy-duty cylinder liners.
- Forged aluminium alloy pistons with changed compression height, larger diameter gudgeon pins and lightweight rings.
- Cylinder block machined for new liners.
- Ladder frame doweled to cylinder block at all main bearing shuts.
- New forged HT steel connecting rods - larger gudgeon pin diameter, new length to suit pistons.
- Steel crankcase strengthening base-plate machined to accommodate bigger diameter crankcase studs and drilled with special oil galleries to attach piston oil spray plumbing.
- Specially manufactured larger crankcase-to-cylinder head HT steel studs.
- Specially manufactured HT steel cylinder head and crankcase nuts.
- Oil spray piston cooling system plumbed to steel base plate and attached to the cylinder block.
- Cylinder head machined and fitted with larger inlet and exhaust seats.
- Larger tuftrided nickel-steel inlet and exhaust valves.
- Cylinder head gas-flowed.
- Cylinder head machined for stronger gasket arrangement and to fit new exhaust manifold.
- Stronger cylinder head gasket.
- New inlet manifold, plenum chamber and throttle elbow - designed to maximise mass airflow with pulse tuned induction length and calculated optimum plenum-chamber volume. Design uses a larger butterfly assembly with attached throttle angle sensor. Castings are black anodized aluminium alloy but magnesium castings are available at extra cost.
- Larger fuel injectors.
- Fuel rail assembly fitted with manifold pressure adjustable fuel pressure relief valve.
- Fabricated stainless steel exhaust manifold plumbed underneath the engine to attach to turbocharger on inlet side.
- BBR built and balanced hybrid Garrett T3 turbocharger fitted with BBR 360¡ heavy duty thrust bearing.
- Specially manufactured heavy-duty single plate clutch, organic linings. (no space in bell housing for twin plates)
- Dyno tested engine. Software written for both fuel and ignition to suit all situations; e.g.
Warm-up cycle - warm-up maps
Slow running - slow running maps
All other throttle and load positions - main maps
Boost control
Closed Lambda loop
Taking into consideration:
Intake air temperature
Coolant temperature
Intake air (manifold absolute) pressure
Throttle angle
Limit parameters
* Part two, in chassis
- Strengthened gearbox - new closer ratio gears; long first gear (70mph; 112kph)
- BBR LSD – new limited slip differential.
- BBR /Johnson Matthey metallic substrate sports cat’.
- Stainless steel exhaust system, straight through silencer.
- Water to air charge cooler to control induction temperatures. Accommodated to the rear of the car but plumbed to a water radiator mounted in front of the main coolant radiator, coolant being circulated by an electric pump, activated by inlet air temperature/boost level.
- Special in-car plumbing for turbo pipework (including oil feed and drain).
- New engine management control computer and loom, connected to original sensors, except throttle angle sensor, attached to the new throttle body.
- Fuel system incorporates new pumps, swirl pot and plumbing.
- Engine breather system.
- Modified engine-cooling system incorporating swirl pot and expansion tank.
- Remote oil cooler and oil filter unit
NB: Dry sump kit, optional – see below.
K300T Parts List at a glance
1 off Forged billet steel crankshaft
4 off Forged steel connecting rods
4 off Heavy duty cylinder liner
4 off Forged lightweight aluminium alloy heavy-duty performance pistons
4 off Lightweight, high performance, piston ring pack
8 off Oversize inlet valves
8 off Oversize exhaust valves
16 off Oversize valve seats
1 off Cast BBR high performance turbo inlet camshaft
1 off Ditto exhaust camshaft
16 off High performance valve springs
1 off Steel cylinder block strengthening base plate
10 off Crankcase/cylinder head fixing studs
10 off Cylinder head nuts
1 off Heavy duty clutch assembly, organic plate
1 off Cast aluminium alloy inlet manifold
1 off Cast aluminium alloy plenum chamber
1 off Cast aluminium alloy throttle elbow
1 off Throttle assembly
4 off Solenoid higher flow fuel injectors
1 off Fuel rail
1 off Fuel pressure relief valve
1 off Stainless steel exhaust manifold
1 off Stainless steel downpipe (to turbo)
1 off Turbocharger Garrett/BBR T3 hybrid
1 off Stainless steel exhaust pipe, turbo to catalyst
1 off High performance catalyst
1 off Catalyst to silencer link pipe (s.st)
1 off Stainless steel silencer
1 off Polished stainless steel tailpipe assembly
1 off Turbocharger compressor to intercooler pipework
1 off Intercooler – water to air type
1 off Intercooler water cooling radiator
1 off Small bore water pump – intercooler circulation
1 off Intercooler to throttle assembly pipework and intercooler water-cooling plumbing
1 off Airbox
1 off Highflow air filter
1 off Airbox to turbocharger inlet pipework
1 off Engine management computer
1 off Engine management wiring loom and connector
1 off MAP manifold sensor
1 off Water temperature sensor
1 off Lambda sensor
1 off Throttle angle sensor
1 off Air temperature sensor
1 off Engine speed sensor
1 off Camshaft/engine position sensor
1 off Catalytic converter – stainless steel substrate, heavy loaded Platinum/Rhodium coating


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