Table of Contents CLICK TO VIEW A SECTION GENERAL INFORMATION A Message From iRacing » Tech Specs » Introduction » Getting Started » Loading An iRacing Setup » Dash Pages » Dash Configuration (Page 1) » Dash Configuration (Page 2) »...
Compared to its big brother in the GT3 class, the Mercedes-AMG GT4 still packs a powerful punch. Despite carrying a smaller 4.0-liter V8 engine, bringing it in line with a street-legal Mercedes-AMG GT, the car still produces a whopping 544 horsepower.
To access the baseline setups, simply open the Garage, click iRacing Setups, and select the appropriate setup for your track of choice. If you are driving a track for which a dedicated baseline setup is not included, you may wwselect a setup for a similar track to use as your baseline.
Upon loading into a session, the car will automatically load the iRacing Baseline setup [baseline.sto]. If you would prefer one of iRacing’s pre-built setups that suit various conditions, you may load it by clicking Garage > iRacing Setups > and then selecting the setup to suit your needs.
MERCEDES-AMG GT4 // DASH PAGES Dash Pages The digital dash display in this car features two selectable pages. DASH CONFIGURATION (PART 1) Engine RPM Graphical depiction of engine RPM T Water Engine water temperature (Celsius or Fahrenheit V Batt Battery Voltage (V)
MERCEDES-AMG GT4 // DASH PAGES DASH CONFIGURATION (PART 2) Engine RPM Graphical depiction of engine rpm T Water Engine water temperature (Celsius or Fahrenheit) V Batt Battery Voltage (V) LaptimeDiff lap time delta to best lap Speed Road Speed (km/h or mph)
MERCEDES-AMG GT4 // DASH PAGES PIT LIMITER / PIT DASH PAGE When the pit limiter is active a blue bar will appear at the top of the screen specifying the current vehicle speed. This bar will be blue while under the limit and red when over. In addition to this, the shift light cluster will flash with alternating blue and yellow lights.
MERCEDES-AMG GT4 // ADVANCED SETUP OPTIONS Advanced Setup Options This section is aimed toward more advanced users who want to dive deeper into the different aspects of the vehicle’s setup. Making adjustments to the following parameters is not required and can lead to significant changes in the way a vehicle handles.
MERCEDES-AMG GT4 // TIRES & AERO Tires & Aero TIRE SETTINGS (ALL FOUR) C OLD AIR PRES SU RE Air pressure in the tire when the car is loaded into the world. Higher pressures will reduce rolling drag and heat buildup, but will decrease grip.
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MERCEDES-AMG GT4 // TIRES & AERO T IRE T EMPER AT URES Tire carcass temperatures, measured via Pyrometer, once the car has returned to the pits. Wheel Loads and the amount of work a tire is doing on-track are reflected in the tire’s temperature, and these values can be used to analyze the car’s handling balance.
MERCEDES-AMG GT4 // CHASSIS Chassis FRONT ARB SE T T I NG Increasing the ARB setting shortens the ARB moment arm and will increase the roll stiffness of the front suspension, resulting in less body roll but increasing mechanical understeer. This can in some cases, lead to a more responsive steering feel for the driver.
MERCEDES-AMG GT4 // CHASSIS CRO S S W EIGH T The percentage of total vehicle weight in the garage acting across the right front and left rear corners. 50.0% is generally optimal for non-oval tracks as this will produce symmetrical handling in both left and right hand corners providing all other chassis settings are symmetrical.
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MERCEDES-AMG GT4 // CHASSIS BR AK E PRES SU RE B I A S Brake Bias is the percentage of braking force that is being sent to the front brakes. Values above 50% result in greater pressure in the front brake line relative to the rear brake line which will shift the brake balance forwards increasing the tendency to lock up the front tyres but potentially increasing overall stability in braking zones.
MERCEDES-AMG GT4 // CHASSIS LEFT/RIGHT FRONT C ORNER W EI GH T The weight underneath each tire under static conditions in the garage. Correct weight arrangement around the car is crucial for optimizing a car for a given track and conditions. Individual wheel weight adjustments and crossweight adjustments are made via the spring perch offset adjustments at each corner.
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MERCEDES-AMG GT4 // CHASSIS considered when altering corner spring stiffnesses in order to retain the same front to rear roll stiffness and overall balance. When reducing corner spring stiffness the ARB stiffness should be increased to retain the same roll stiffness as previously. Three options for spring rate are available ranging from 150 N/mm (857 lbs/in) to 200 N/mm (1142 lbs/in).
MERCEDES-AMG GT4 // CHASSIS LEFT/RIGHT REAR RE AR RIDE HEI GH T Distance from ground to a reference point on the rear of the chassis. Increasing rear ride height will decrease rear downforce as well as increase overall downforce and will allow for more weight transfer across the rear axle when cornering. Conversely, reducing ride height will increase rear downforce percentage but reduce overall downforce while reducing the weight transfer across the rear axle.
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MERCEDES-AMG GT4 // CHASSIS control for aerodynamic performance and overall chassis response but it is important to avoid situations where the shock is too slow in rebounding as this will result in the tire losing complete contact with the track surface. This can be particularly detrimental during braking events and during the initial turn-in phase though an increase in rebound stiffness can help to ‘slow down’...
MERCEDES-AMG GT4 // CHASSIS REAR FUE L LE V EL The amount of fuel in the fuel tank. Tank capacity is 97 L (25.6 g). Adjustable in 1 L (0.26 g) increments. ARB SE T T I NG Increasing the ARB assembly stiffness will increase the roll stiffness of the rear suspension, resulting in less body roll but increasing mechanical oversteer.
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