Racing Dynamics Z8 R50S

    Description

    The Racing Dynamics Z8 R50S is an upgrade from the production BMW Z8 (E52 body). The main part of the alterations fell on the engine.

    Engine

    To upgrade the BMW S62B50 engine (the same one was installed on the BMW M5 E39), the following kits were offered to choose from:

    • performance kit R50s – modification of the engine management software: changing the speed limit, the amount and time of fuel injection, increasing the maximum speed limit stored in the serial control unit;
    • improved performance with four special camshafts;
    • "RS" sports exhaust manifold kit, "RS" metal-based sports catalysts;
    • replacement of standard plastic inlet funnels;
    • sports rear muffler set (left/right), entirely made of stainless steel, with larger pipe cross-section, optimized flow pattern and reduced exhaust back pressure.

    As a result of all upgrades, engine power increased from 394 hp. up to 515 hp as a result, the dynamics of the car improved – the maximum speed increased to 309 kph, and acceleration to hundreds was reduced from 4.7 to 4.4 s.

    Transmission

    The following elements were proposed for the modernization of the vehicle transmission:

    • the "RS" sports clutch, which made a significant contribution to the outstanding acceleration values thanks to the higher transmission torque and significantly lower mass moments of inertia. The combination of a lighter, reinforced clutch pressure plate and a special clutch plate with organic sports friction linings resulted in an increase in transmitted torque of up to 40%. It was especially recommended for frequent use on test and racing tracks.
    • high-quality lockable rear axle differential with variable locking effect from 0 to 80% using patented ATB (Automatic Torque Biasing) technology;
    • shortening the shift lever travel by up to 35%, which was especially important when driving on test and racing tracks, but the required effort when shifting gears increased.

    Chassis

    The following kits were offered to upgrade the suspension:

    • 3 types of ultra-light spacers made of high-strength aluminum-magnesium alloy for widening the vehicle track on the front and rear axles with corrosion protection;
    • a special set of reinforced adjustable anti-roll bars;
    • set of lowered springs by 25 mm.

    To replace the standard 18-inch rims, there were three options for 245/35 R20 tires at the front and 275/30 R20 at the rear:

    • ultra-light one-piece RC-8F forged wheels with a full high gloss polished surface thanks to a clear lacquer with ceramic particles using nanotechnology;
    • artificially aged one-piece alloy wheels RD-2 with glossy silver finish;
    • 3-piece ultralight RS-2F UltraLight forged wheels with a full high gloss polished finish thanks to a clear lacquer with nanotech ceramic particles.

    Brake system

    The brake system could also be upgraded with one of two options (Version 1 on the front axle, Version 2 on both axles), which included two-piece slotted brake discs with decoupled brake discs, as well as special 8-piston fixed aluminum brakes. weight-optimized monobloc calipers and special brake pads with increased friction surface to prevent overheating. The system was complemented by flexible steel brake hoses, which, in combination with the BMW ABS system, ensured a constant pedal feel even at maximum load.

    Exterior

    To improve the appearance, the following kits were offered to choose from:

    • front spoiler lip to increase downforce on the front axle at high speeds;
    • rear skirt trim with integrated diffuser and cut-outs for two tailpipes of the sports exhaust system;
    • exclusive sport rear muffler set (left/right) with embossed Racing Dynamics lettering;
    • roadster roll bar kit in polished lightweight stainless steel as a replacement for the standard roll bars.

    Interior

    The changes inside were even less noticeable than outside. The following options were offered to choose from:

    • a set of soft velor floor mats with an embroidered Racing Dynamics crest;
    • a similar velor trunk mat with a similar coat of arms;
    • aluminum shift knob with integrated crest;
    • aluminum parking brake handle with engraved letters;
    • a set of aluminum anodized (black or blue) pedals with a stand under the left foot for a manual transmission;
    • speedometer with extended scale value up to 340 kph with Racing Dynamics inscription;
    • changing the colors of dials and instrument indicators.

    Sources

    Bodywork
    Years of production
    2000
    Body type
    родстер
    Number of doors
    2
    Number of places
    2
    Engine
    Engine type
    бензиновый
    Engine location
    спереди, продольное
    Engine model
    BMW S62B50
    Cylinders
    V8
    V-angle
    90°
    Cylinder operation
    1-5-4-8-6-3-7-2
    Capacity (cc)
    4941
    Power output (hp / kW /)
    515 /
    384 /
    at rpm
    7400
    Torque (N·m)
    605
    at rpm
    4000
    Bore (mm)
    94,0
    Stroke (mm)
    89,0
    Compression
    11,0
    Number of valves
    4/32
    Valvetrain
    DOHC
    Block material
    алюминиевый сплав
    Oil sump capacity (l)
    6,5
    Fuel system
    впрыск
    Fuel system model
    Bosch Motronic
    Turbocharger
    Specific
    Specific output (hp/litre)
    104,23
    Specific output (hp/tonne)
    317,90
    Specific output (kg/hp)
    3,15
    Specific torque (N·m/litre)
    122,44
    Specific torque (N·m/tonne)
    373,46
    Transmission
    Driven wheels
    задний
    Gearbox model
    Getrag S6S 420G
    Gearbox
    механическая
    Number of speeds
    6
    Final drive ratio
    3,150
    First gear ratio
    4,230
    Second gear ratio
    2,530
    Third gear ratio
    1,670
    Fourth gear ratio
    1,230
    Fifth gear ratio
    1,000
    Sixth gear ratio
    0,830
    Suspension
    Front suspension
    макферсон
    Rear suspension
    независимая многорычажная
    Elastic elements in front
    пружины
    Elastic elements in rear
    пружины
    Front anti-roll bar
    да
    Rear anti-roll bar
    да
    Wheels brand
    Racing Dynamics RS-2F UltraLight
    Tyres front
    245/35 R20
    Tyres rear
    275/30 R20
    Steering
    Steering type
    шестерня-рейка
    Power steering
    гидравлический
    Turning diameter (m)
    11,8
    Brakes specs
    Brakes front
    дисковые вентилируемые
    Brakes rear
    дисковые вентилируемые
    Brand of brakes
    Racing Dynamics
    Front brake diameter (mm)
    380
    Rear brake diameter (mm)
    330
    Disc material
    чугун
    Anti-lock braking system
    да
    Dimensions and weight
    Body
    трубчатый каркас
    Body material
    алюминий
    Length (mm)
    4400
    Width (mm)
    1830
    Height (mm)
    1317
    Wheelbase (mm)
    2505
    Front track (mm)
    1552
    Rear track (mm)
    1568
    Ground clearance (mm)
    93
    Drag coefficien
    0,430
    Curb weight (kg)
    1620
    Max. weight (kg)
    1900
    Trunk volume max (litre)
    203
    Performance specs
    Ecological class
    Евро 3
    Fuel tank capacity (l)
    73
    Fuel type
    Аи-95
    Dynamic specs
    Acceleration 0-100 kph (s)
    4,4
    Top speed (kph)
    309
    Top speed (mph)
    192
    Last modified
    07.07.2023

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