Alfa Romeo

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Alfa Romeo

• Seminar
• 23 Jan 2005

Wirtten by Simon of www.italianhands.com
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Alfa Romeo Seminar Content

• Engine basic
• Alfa engine philosophy
• Alfa technologies
• Alfa end results

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1. Engine Basic
Fuel
Air
Air to fuel 14.71
Electric
Exhaust
Engine
Output rotational force
Lubrication
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• Air
• Fuel
• Electric
• Engine
• Exhaust
• Cooling
• Lubrication

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• Air
• Need precision measurement
• Smooth
• Ramming effect
• Twin cam
• Valves
• Tumble
• Cooling
• Turbocharge / supercharge

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• Fuel
• Precision injection quantity
• atomization
• Fuel pressure

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• Electric
• Stable
• 13.5V
• Withstand high temperature
• Chassis earth

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• Cooling
• Temperature control
• Maintain 90C operating temperature
• Efficiently rise to operating temperature
• Engine best at 90-105C

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• Lubrication
• Lubricate moving parts
• Cooling

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• Exhaust
• Scavenger effect
• Exhaust tone
• Heat up catalyst
• Turbo need temperature control

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2. Alfa philosophy

• High performance
• Nice Exhaust tone
• Natural Aspiration
• Reliability?
• Durability?
• Stability?
• Fuel economy?

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3. Alfa technologies

• Engine layout
• Engine block
• Cam
• JTS
• Fuel system
• Exhaust

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Engine layout

• Boxer
• In-line 4
• V6
• Performance Comparison

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Boxer features
Iron block alloy head SOHC/DOHC Fuel
injection 4-2-1 exhaust Belt driven High tension
wire
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Inline 4 features
Iron block Alloy head DOHC Fuel
injection 8v/16v 4-2-1 exhaust/ stainless
exhaust Chain/Belt driven High tension
cable/ignition coil Variable valve timing Twin
spark JTS Variable intake system Water/oil heat
exchanger
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V6 features
Alloy block alloy head Fuel injection Variable
intake system Electronic throttle Ignition coil
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Comparison

• Boxer
• 1990-1994 series
• 1.5 8v 105bhp_at_6000
• 1.7 8v 112bhp_at_5800
• 1.7 16v 137bhp_at_6500

• In-line 4
• 1990-2000
• 2.0 8v 141bhp_at_6000
• 2.0 16v 150bhp_at_6200
• 2.0 16v 155bhp_at_6200

• V6
• 1990-1994 series
• 2.5V6
• 3.0V6 12v 192bhp_at_5600
• 3.0V6 24v 210bhp_at_
• 3.2V6 250bhp_at_

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Technical features

• Alloy block
• Cast iron block
• Steel liner

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• Twin Spark
• Old design working principle
• New design working principle
• Waste spark
• 1.6 1000cc 76hp
• 1.8 1000cc 80hp
• 2.0 1000cc 75hp

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• V6
• 3.0 1000cc 73hp
• 2.5 1000cc 75hp
• 3.2 1000cc 78hp

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• JTS
• Jet thrust stoichiometric
• Lean burn
• Direction injection
• 1000cc 83hp
• Increased compression ratio, therefore thermal
  efficiency

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• Variable geometry intake path

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• Tooth belt
• Timing chain

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• Spark plug type
• Hot type cold type
• Normal
• Platinum
• Iridium

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• Air filter type
• OEM
• Genuine
• KN panel
• Mushroom type

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• Engine oil
• Viscosity
• 10W-60
• Synthetic vs. mineral oil
• Tolerance
• Maintain viscosity throughout temperature
• Slow deterioration
• Withstand high temperature
• Less vapourization

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• Fuel
• Fuel additive
• Octane booster
• Injector cleaner

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• Electronic throttle

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• Ignition coil
• High tension wire/cable

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• Exhaust system
• Stainless steel
• 4-2-1

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Operating parameters

• Intake length
• Smoothness
• Overlap timing
• Exhaust length
• Diameter
• Manifold
• Fuel pressure

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High performance engine

• 1000cc NA 110hp

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Transmission

• Manual
• 2.0 selespeed
• 2.5 Q-system
• 3.0 Q-system
• 3.2 Sportronic CAE Cambrio Automatico Elettronico

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Manual

• 2.5V6 Clutch plate has dual mass flywheel
• Therefore no spring on clutch plate
• Clutch impulse damper

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Selespeed

• A hydraulic controlled manual gearbox
• Designed primarily as sporty sequential
  transmission
• But so advance that can also be used as automatic
• Advance CITY mode
• On 2.0, GTA

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Q system

• A 4 speed automatic gearbox structure
• Sport City Ice
• With shifting programs
• On 2.5V6

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Sportronic

• On 166
• A 4 speed automatic gearbox structure
• With 12 shifting programs
• Self adaptive

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Drivetrain

• Limited slip differential
• Good and bad for
• Front wheel drive
• Rear wheel drive
• 4 wheel drive Q4

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Chassis

• Suspension type
• Wheels and tyres
• Brakes
• Safety features
• Body

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Suspension

• Aims
• Steering feedback
• Anti dive
• Anti squat
• Self centering
• Cornering ability
• Rear suspension aids steering

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Suspension type

• Aim Space vs. handling
• McPherson strut compact
• Double wishbone good handling
• Multilink compact and good handling
• DeDion - the best rigid axle

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156 Suspension
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• Trailing arms

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• wishbone

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• McPherson

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• DeDion

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Dampers

• Koni vs. Bilstein
• Oil vs. gas
• Electronic dampers best of both world
• Self leveling BOGE Nivomat

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• E-dampers
• Front and rear accelerometers

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Nivomat

• Self control and self power
• Fitted to 156 SW

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Wheels and tyres

• Alloy wheel size 6.5J x 16
• Tyre requirements dry grip, wet grip,
  hydroplaning, noise, life
• Compound vs. tread pattern
• Size/diameter/width
• pressure
• Tyre life
• High performance tyre outer edge more compound

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Brakes

• Inboard vs. outboard
• Ventilated disc vs. solid disc
• Grooved, drilled, combi
• Sport pad vs. competition pad
• Bed in procedure
• ABS/TCS/VDC/EBD/EBA/ASR/MSR

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• ABS anti lock brake system
• EBD electronic brake distribution
• TCS traction control system
• EBA emergency brake assist
• VDC vehicle dynamic control
• ASR Anti slip regulation
• MSR - Motor Schleppmoment Regelung

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Brake disc

• Cross drilled/Groove
• Ventilate/Solid
• Overheat/warp
• Dust removal

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Safety

• Fire prevention system
• Inertia switch
• Crumble zone
• Pretensioner
• ISOFIX
• Collapsible column
• Air bags
• Dual zone air con

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Body

• Galvanized steel
• Multi layer door
• Xenon light
• Anti abrasion coating
• Weight distribution
• Polar moment

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AutoDelta

• Its Tuning philosophy
• J10 J11 J12 Turbo
• GTA AM Bigger bore
• Super Roterx Supercharger
• Engine, suspension, brakes, transmission

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• Roterx

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Thank You