FM6 FAQ: Upgrading
Forza’s upgrade options allow you to change the look of a car and improve its performance within its class or in a higher class. In general reducing weight improves performance but sometimes a heavier part can provide stability that helps acceleration, or reduces the overall PI in the car class to make room for another part. Some cars have fewer options but in general the upgrade categories and groups are the same for all cars, will varying specific impact on each car model. To tune gearing, suspension, brakes, or aero the car must have an adjustable (Race level) part installed. Parts cost credits to buy buy once owned they can be removed and reinstalled for free. Bought parts are assigned to each specific car, so if you had two Vanduras you would need to buy a camshaft for each, etc. Installing a conversion will uninstall some related parts the Engine or Drivetrain (differential).
Find the Upgrade Shop in the TUNE tab of the main menu. From the Upgrade Shop you can press X to Tune car, press Y to Test Drive, or press the Show button for the Setup Manager where you can load your own tunes, find shared tunes for the current car, and sync and import FH2 and FM5 tuning setups.
When reviewing each part for upgrade you can toggle car ratings (speed, handling, etc), horsepower and weight, and benchmark data for 0-60, top speed, braking, and lateral g’s to see how the part will affect your car before you commit to buying or installing it.
Quick Upgrade
For a fast upgrade you can have the game decide which parts to install to bring the car to the top of the target class. This will not install aero, body kits, rims, or drag tires.
Engine
Change your horsepower and torque, engine response, and overall weight with these parts: Air Filter, Manifold, Fuel System, Ignition, Exhaust, Camshaft, Valves, Displacement, Pistons, (charger if installed), (intercooler if installed), Oil, Flywheel. Installing a turbo or supercharger on a naturally aspirated engine or vice versa will remove some installed parts as applicable.
Platform and Handling
Brakes, Springs, Anti-Roll Bars, Roll Cage, Weight Reduction. Changes to these parts at Race level have a visible effect on the car. Brakes, Springs, and ARBs allow for tuning.
Drivetrain
Clutch, Transmission, Driveline, Differential. Sport and Race transmission allow tuning gears. A new differential will have to be bought and installed after an AWD or RWD conversion.
Tires
Tire Compound - Street, Sport, Race, and Drag. A purchased width will stay installed for any installed tire compound.
Are there tires for wet conditions? What if my tuning setup doesn’t include them?
“We automatically change the tires, if the car has race tires. If it has street tires, they are used in wet, dry and cold.” (s) PI and tuning does not change based on this automatic setup.
Rims
Buying a rim will unlock the ability to change rim size. Three rim styles split up rim models so be sure to check each one for a manufacturer and model. Rims come in 5 relative weights, and the same rim may be 4x as heavy on a large car compared to the same rim on a small car. Prices range from 3400 credits for a set to 3700 credits for the lightest rims.
Wheel offset
There is no option to change wheel offset, though this may appear to change depending on the rim used.
Body Kits and Aero
In general most cars have a Forza front bumper and Forza rear wing for adjustable aero. Some cars have multiple hood, sideskirt, bumper, and wing options from aftermarket brands.
Conversion
Change Aspiration to turbo or supercharged, Drivetrain to RWD or AWD, or swap in a different Engine.
Blowers and Hoods
There are no upgrade parts to add a blower through hood. Dom’s 1970 Charger (DLC) is the only car that has this feature.
Nitrous
There is no Nitrous boost in FM6 as used in Forza Horizon 2 Presents: Fast & The Furious. - see discussion thread.