TORA Spec Cup Season 5: The Car

Above all else the BAC Mono has been designed to optimise the driving position – in the middle, central to the wheels, and the balance of the car.

The BAC Mono is constructed using high-strength carbon fibre composite around a steel safety cell. The cell is designed to offer maximum safety featuring a FIA compliant steel rollover structure, a sophisticated side impact structure and a front carbon crashbox.

Powering the BAC Mono is a longitudinally mounted 2.5 litre, 305 bhp four-cylinder power plant provided by Mountune. Coupled to that engine is an F-3 spec 6-speed sequential gearbox from Hewland.

Suspension is a fully-adjustable pushrod suspension with damping elements made by SACHS Racing. Fitted with 295mm ventilated discs, AP Racing brakes provide stopping power.

Tyre manufacturer Kumho has used their vast experience in motorsport and road cars to develop a special rubber compound for the Mono, which is designed to work with the low weight and optimized pushrod suspension.

The BAC Mono’s central driving position makes the driver an integral component of the car, creating an unparalleled synergy between man and machine. With this in mind, each customer is fitted for his or her seat, pedal reach and preferred driving position.


Vehicle Specifications

Dimensions and Weight

Overall width: 1836mm
Overall length: 3952mm
Height: 1110mm
Wheelbase: 2565mm
Ground clearance: 100 mm (f) / 110 mm (r)
Dry Weight: 580kg
Power to weight ratio: 525 bhp per tonne
Weight distribution: 48% (f) / 52% (r)

Performance

Maximum speed - 170 mph (274 km/h)
Sprint 0-60 mph - in 2.8 seconds

Engine

Type: Normally aspirated, structurally mounted
Displacement: 2488 cc
Configuration: 4 cylinder, in-line
Valve train: VVT
Bore x stroke: 89 mm x 100 mm
Maximum power: 305 bhp
Maximum torque: 308 Nm

• Forged connecting rods and forged Cosworth pistons
  
• Dry sump lubrication with internal scavenge pump
  
• Performance inlet and exhaust camshafts and uprated valve springs
  
• Gas flowed cylinder head with roller barrel port throttles
  
• BAC / ITG aero optimized carbon inlet, remote filtration system and carbon airbox
  
• BAC developed 4 into 2 into 1 stainless steel exhaust manifold and centrally mounted exhaust system
  

Gearbox

Model: Hewland FTR, fully stressed with integral engine oil tank
Type: 6 speed sequential
Differential: Powerflow LSD
Gear selection: Shiftec electronic/pneumatic semi-automatic closed loop system operated via steering wheel mounted paddles

Clutch: AP Racing

Suspension

Type - Front: Adjustable pushrod activated twin wishbone system with needle roller bearing mounted bell cranks, rising rate, optimized camber change and roll centre position, full Ackermann geometry, shim adjustable camber

Rear: Gearbox mounted, adjustable pushrod activated twin wishbone system with needle roller bearing mounted bell cranks, rising rate, optimized camber change and roll centre position, shim adjustable camber

• TIG welded seamless CFS3 steel aero tube twin wishbones
  
• Ultra light, billet aluminium uprights front and rear
  
• Two way adjustable Sachs racing RDS - 36 formula damper system
  
• Race spec Eibach 280lb front and 325lb rear springs
  
• Rising rate jounce rubbers
  
• Adjustable front and rear torsion bar
  

Brakes

• AP Racing, Formula Car callipers - radial 4 piston (F & R)
  
• AP Racing, 295mm ventilated discs, crossed drilled, billet machined mounting bells (F & R)
  
• AP Racing pedal box mounted, differential bore, dual circuit master cylinders
  
• BAC designed and developed, adjustable, billet, floor mounted pedal box with ball bearing mounted billet pedals
  

Wheels and Tyres

Wheels (f): O.Z. Racing / BAC developed HRT alloy 7.5j x 17in
Wheels (r): O.Z. Racing / BAC developed HRT alloy 8.5j x 17in
Tyres (f): Kumho / BAC developed V70a 205/40 R17
Tyres (r): Kumho / BAC developed V70a 245/40 R17

Interior

• Tillett / BAC developed fixed position carbon fibre seat
  
• "Extreme" waterproof leather, Microcare MC waterproof "suede" trim
  
• BAC developed 290mm diameter billet aluminium steering wheel  
  
• GEMS LDS4 colour display system
  
• 16 pin quick release steering boss
  
• Touch sensitive starter button
  
• Willans safety restraint system, FIA compliant seat belts
  

Source: www.bac-mono.com
Some info has been shortened or restructured to optimise it for this forum post. If data has been falsified during the creation of this post, it was not on purpose by the editor/author.