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NOTE: if you remove the rear spoiler, you don't can modify the downforce.
Part five: Tuning Parts list
This part it is only a list of the modifications parts whit their description.
Legend:
N: stock part
X: level part (replace the “X” with a number, ex. 3)
S: special part
H: high grip tires
S: soft tires
OFF: remove the rear spoiler
Engine: the best way to increase your car performance. Tune the engine.
Group: Power
Number of parts: N+10+S = 12 Parts
IMPORTANT NOTE: the last three levels (9, 10 and S) there are “hidden levels”
but progressing with levels you will unlock these parts.
Normal (N): Equip the stock parts.
Level 1: Replace the fuel injector and pump to increase power output. Equip
a bypass valve to avoid an engine blowout during high RPMs.
Level 2: Update the computer software controlling the engine, increasing
power potential.
Level 3: Tune the inlet system. Allows the air cleaner, intake pipe,
suction pipe, surge take, etc. to draw more air into the engine.
Level 4: Tune the high camshaft. Alter the camshaft profile, increasing the
efficiency of the exhaust and allowing the engine higher
revolutions and power output.
Level 5: Install high compression pistons and a cured-in-place (CIP) gasket.
Upgrading to high compression greatly increases acceleration.
Level 6: Polish the ports and upgrade the combustion chamber. Polishing the
ports improve exhaust efficiency, and polishing the interior walls
of the combustion chamber, as well as aligning its capacity,
increases engine potential.
Level 7: Install a big valve and a strengthened valve spring. Also perform a
valve sheet cut at same time, greatly improving exhaust efficiency.
Level 8: Install an actuator turbine, increasing power and allowing even NA
cars to be turbocharged. Far more powerful than a normal turbine,
an actuator allows for a greater power output.
Level 9: Install a large caliber actuator turbine. A larger compressor mouth
allows more air to be expelled, increasing power output.
Level 10: Install a wastegate turbo kit used for racing. Includes a big
turbine that expels even more air than an actuator turbine.
Exchange
the suction pipe, intake pipe, exhaust manifold, front pipe, etc.
with specialized parts.
Special (S): Upgrade to a fully tuned engine, designed for racing in GT class
races. This engine has quicker acceleration and a faster top speed
than any other engine, and has the greatest power potential.
Exhaust: an easy way to modify a car. Change exhaust/air intake.
Group: Power
Number of parts: N+3+S = 5 Parts
Normal (N): Equip the stock parts.
Level 1: Install a basic performance muffler, designed for improve the power
output of anything up to a lightly tuned car. Exhaust efficiency
improves, increasing acceleration.
Level 2: Install a 100% stainless steel muffler that increases capacity of
the silencer, alters the thickness of the main pipe, and produces
an overall improvement in efficiency. Great for both middle-range
and high-end cars, it provides outstanding performance on the
streets.