Gran Turismo 5: Car Tuning Guide

                               Gran Turismo 5
                       Car Tuning FAQ(December 1st'10)
                           Written by: Aj the one


Table of Contents

A. Introduction
B. Legal Stuff
C. Body/Chassis
 C1.Aerodynamics Tuning
D. Engine
E. Intake System
F. Exhaust
G. Turbo Kits
H. Transmission
 H1.Gear Adjustments
I. Drivetrain
 I1.TSD Tuning
 I2.LSD Tuning
J. Suspension
 J1.Suspension Tuning
K. Brakes
L. Tires
M. Credits

*All values shown in credits
Hello to my fellow GT fans!!! After a long wait GT5 is finally upon us and I
am exceptionally happy at the overall package that they put out. It has some
problems which need to be addressed(the Individual Gear Ratio thing pisses me
off) but it's still a great game. With that being said I decided to write a 
tuning FAQ for those who needed some help on how to tune their cars to 
perfection. Now experimentation is the key here so try out various settings to
see which one works best for you, as there is no right or wrong setup. Well
dive in!!!

My PSN ID is IntelligentAj for those who care

B.Legal Stuff
My FAQ may not be reproduced under any circumstances except for personal or
private use. It may not be placed on any web site or otherwise distributed
publicly without advance written permission. Use of this guide on any other
web site except for and or as part of any public
display is strictly prohibited, and a violation of copyright.

Copyright 2010 Armand Sellers

In this section you can reduce the weight of your car significantly which will
help increase your car's acceleration and cornering ability by a large margin.
You can also increase your car's rigidity which will stabilize your car as
you corner.

Weight Reduction-Removes non-essential parts of the car to reduce overall 
weight and improve acceleration and cornering ability

Stage 1-5000/Reduces weight by a little under 10%
Stage 2-10,000/Reduces weight by a little under 10% again
Stage 3-20,000/Reduces weight by about 8%

Chassis Reinforcement-20,000/Makes car more rigid which stabilizes the car on

Window Weight Reduction-3,000/Replaces window glass with lighter material to 
reduce weight and improve cornering performance/Drops weight by 10kg

Carbon Hood/Body Color-5,000/Replaces standard hood with Lightweight Carbon 
hood to reduce weight and make you car look better/Drops weight by 5kg

By going to GT Auto and adding a Wing to your car or other car modifications
you can adjust the downforce in the tuning menu. Now depending on the type of
car you have and how you want it to handle there are a couple of ways you can
adjust the downforce.

Front Downforce Low/Rear Downforce High-This setup will make your car tend to
oversteer thus helping you corner easier. Be careful though as this can also
make it easier to spin out. Great for: FF,MR,4WD

Front Downforce Middle/Rear Downforce Middle-This is a balanced approach that
will give your car better top speed and a slight boost in cornering without
much downside. Good for all Drivetrains

Front Downforce High/Read Downforce Low-This setup is designed to make your
understeer much more than normal. It gives a small degree of control to 
powerful FR cars like the Corvette Z06(This is the setup I have for it) so
they don't fishtail as much. Great for FR or any car which has a problem with
too much fishtailing.

This is the area where you can make your engine much more efficient and give
it more Horsepower and Torque which will increase Max Speed and Acceleration 
respectively as well as improve the overall feel of the car. I recommend 
buying the ECU before anything else as it has an enormous benefit for a cheap

**IMPORTANT**Make sure that you go to GT Auto and change your oil. This will
give a yourc ar a nice bump in HP and Torque and make your engine perform

Engine Tuning-Improves balance of the parts in the engine and makes the engine
operate smoother, which increase power and acceleration

Stage 1-2,500/Gives a small/medium increase in BHP/Torque
Stage 2-15,000/Gives a medium increase in BHP/Torque
Stage 3-30,000/Gives a medium/high increase in BHP/Torque

**I was going to try and figure out the percentages but based on what i've
tested it wildly varies according to how strong the engine is at first

ECU Tuning-Installs a high performance Electronic Control Unit to improve
engine performance and maximize power output

Stage 1-1,000/Increases BHP by a small amount but improves virtually every 
aspect of engine performance. 

E.Intake System
Here you can improve the flow of air into the engine which will make the
engine stronger and more efficient. These uprgades should follow the engine

Sports Intake Manifold-2,500/Minor increase to HP/Improves air intake
efficiency to increase throttle response and engine power

Sports Air Filter-250/Minor increase to HP/Reduces Air Intake resistance to 
improve engine power

Racing Air Filter-450/Small increase to HP/Installs a high performance Air 
Filter which reduces air intake resistance further and gives a greater
increase to power

Your exhaust system is vitally important to maximizing your engine's 
performance. Here you can improve the exhaust and change out the manifold and
Catalytic Converter also increasing power and making your car sound much more

Exhaust-Replaces the standard exhaust with a higher quality Steel or Titanium
exhaust, thus improving power and making your car louder.

Sports Exhaust-1,500/Minor increase to HP/Stainless Steel Sports Exhaust for
High RPM's

Titanium Semi-Racing Exhaust-7,500/Small/Medium increase in HP/Titanium Alloy
Exhaust for High RPM's

Titanium Racing Exhaust-10,000/Medium/Large increase in HP/Efficient, High
Performance Titanium Exhaust for High RPM's

Sports Exhaust Manifold-3,500/Minor increase to HP/Engine Headers which
improve combustion efficiency and peak enging output

Catalytic Converter-500/Minor increase to HP/Reduces resistance from the Cat
converter, removing pollutants and increasing engine output. 

G.Turbo Kits
Here is where you can add a turbo charger to your car if your car is turbo
charged or a supercharger if your car can take one. These guys increase HP and
Torque a significant amount and make your car much faster. Care should be
taken with the Turbo kits however as the highest HP may not be the best answer
for your car.

Turbochargers-Forced induction devices which increases engine power by using
engine exhaust to power a compressor/comes with a racing intercooler also.

!!!IMPORTANT!!!Unlike Enginge upgrades each turbo kit has a specific 
application therefore you can choose which one you want without having to buy
the other 2

Low RPM Range Turbo Kit-4,500/Small increase in HP/Provides excellent engine 
response and very little to no turbo lag at low RPM's but does terrible at
higher RPM ranges. Ideal for courses with little straightaways and alot of
corners as the low end acceleration this provides will help you much more.

Mid RPM Range Turbo Kit-10,000/Medium increase in HP/Improves engine response
at the Mid RPM's and gives a good jump to power. Due to these facts, this is
the most balanced Turbo Kit and will most likely be the best fit for your car
if it doesn't have an insane amount of HP.

High RPM Range Turbo Kit-20,000/Large increase in HP/Improves engine output at
the High RPM range and as such does very poorly at lower RPM's. You will 
experience a nice amount of turbo lag if you find yourself spending alot of
time in the lower RPM ranges. Use this turbo kit if that doesn't bother you
or on High Speed courses with a small amount of corners and alot of max speed

Supercharger-17,500/Forced induction device that uses the crankshaft instead 
of the exhaust to power the compressor. Improves engine power in the Low to
Mid RPM range making this a good fit, if your car can support one.

You can make your engine as strong as you want but if you don't have a
Transmission to send that power to the wheels you basically have nothing. Here
you can upgrade your transmission to improve your acceleration or max speed.

5 Speed Close-Ratio Transmission/6,000/As it's name implies this is a tranny
which has the gears closer together to increase acceleration but decrease top

6 Speed Close-Ratio Transmission/8,000/This is a tranny in which the gears are
spaced close together again sacrificing speed for acceleration. This has a 
higher top speed than the 5 Speed Transmission though.

Fully Customizable Transmission/20,000/Special Service Device which is
supposed to let you customize all the gear ratios individually, thus meeting
the need for any race. For some reason you can only adjust the Max Speed 
slider to the left for more acceleration or to the right for a higher top 
speed. In almost all cases I would have to recommend this as it's got the
versatility for anything.


!!!IMPORTANT!!!Hopefully Polyphony realizes that they screwed up big time and
make the gears individually adjustable as this not being able to adjust the
gears individually is anathema to most real racing fans.

With the Fully Customizable Transmission you can alter the top speed slider in
the tuning menu of your car. The further to the right you move the slider the
faster your car will be but the slower it will accelerate. Inversely the more
to the left the slider is the faster your car will accelerate but it will have
a slower top speed. The Ideal level changes for each car so I can only tell
you to get on a practice track and test to see at which level your car flies
through it's powerband but still gets a high enough top speed that doesn't
take forever to get to.

Your drivetrain is almost as important as your transmission when it comes to
acceleration and max speed. Here you can change your clutch and flywheel to
improve shifting and engine performance. You can also add a Limited slip
Differential and a Torque Sensing Center Differential.

Single Plate Clutch/1,500/Engages and Disengages the transfer of torque 
between the engine and gears.

Twin Plate Clutch/2,500/Reduces the size of the clutch by using two plates. 
This reduces momentum when the clutch spins and increase engine response and
grear changes.

Carbon Drive Shaft/4,500/Reduces drivetrain momentum which improves engine

Torque Sensing Center Differential/15,000/A differential that can alter the
torque distribution in a 4WD car from 0/100% or 50/50. If you have a 4WD car
I highly recommend getting this as it can basically change the handling 
properties of your car

!!!IMPORTANT!!!This can only be used for 4WD cars, which is a shame because it
is one of the best upgrades in the game. 


This is an invaluable tool to 4WD cars as it can totally change the way the
car handles by shifting the amount of torque the front and back wheels. You
make the car handle like a 4WD drive car, balanced without too much over/under
steer, or you can shift the torque to the back and turn it into a MR or FR 
like monster.

**My car for these tests if the Audi R8 5.2 FSI Quattro as it's a high powered
beast and also handles like a dream making it perfect for these tests!!

Front Torque 50%/Rear Torque 50%-This is the most balanced configurationa and
will please most people because it doesn't go to far with either extreme. With
this you can expect a balanced car which will take corners at a medium speed
and very small likelyhood of spinning out, unless the rear tires are on grass
or dirt, then nothing can help you.

Front Torque 40%/Rear Torque 60%-With this setup your car will still be stable
but you'll feel that the car is a little looser which will let you take 
corners easier. Still not much likelyhood of spinning out with this config as
long as you have decent throttle control.

Front Torque 30%/Rear Torque 70%-At this level you'll start noticing that your
car starts to get quite loose. It's still able to stick to the road and if you
know how to handle your car this is in most cases the best of both worlds as
it takes corners much easier than at lower levels and still keeps you from
spinning out in a lot of circumstances. Just a warning though: Don't go to
this level until you have spent a good amount of time with your car and know
it's tendencies.

Front Torque 20%/Rear Torque 80%-At this point differences from the other
levels are greatly evident. You'll notice that it's quite easy for your car
to spin out now if your not careful. The car handles a little better on faster
corners but slower corners are more of problem since the car essentially acts
like a FR car with a little more control. I personally think this level is too
much but i'm sure someone will like it.

Front Torque 10%/Rear Torque 90%-Now on this level the difference between the
lower configurations are extreme. On this setting your car acts like a full
fledged High power FR car meaning plenty of fishtailing at low to medium 
speeds. If you like to drift however then this setting is for you as a tap of
the E-Brake will send you on your way to an extreme drift. Like the setting
before this I can't recommend this unless you have a supreme command of your
car... or if you like to drift.

I didn't cover the 5% increments cause the differences between them aren't
that great. If one setting seems like to little or too much just adjust it in
5% increments until you find the setting which works for you.

Final Thoughts-I can't begin to describe how important this feature is to 4WD
cars. It can take the most out of control car and turn it into a smooth beast
capable of taking cornering at nice speeds and ripping through races. If you
have a 4WD car you need to make adjusting this one of your priorities.
Adjustable Limited Slip Differential/7,500/Fully adjustable LSD that controls
the rotation difference between the left and right wheels. You can change the
limit for both acceleration and braking. 


The Limited Slip Differential can be just as important to car performance as
any of the other tuning options. It can act during Acceleration, Deceleration
or both. The more the LSD can limit the rotational difference between the
left and right wheels, the more traction will be retained and the more stable
braking will be, this however will reduce your car's turning ability, leading
to understeer.

**Like the other tests I used my Audi R8 5.2 for these tests to get a handle
on how it affects 4WD cars and my Corvette Z06 '09 RM for the FR car feel. 
IMPORTANT THING!!!! If you have great throttle control you can keep your tires
on the ground and get as much power as you can from your engine to the road

Initial Torque-This is the amount torque necessary for the LSD to kick in. As
it's in-game description says it makes your car more stable by preventing
sudden changes in performance when the LSD is actived during Acceleration and 

FR-At low levels you won't really notice a difference in how the car handles.
I didn't notice a difference until I put the torque up to about 35. At that
level the understeer becomes more pronounced and the car a little easier to
handle. This does absolutely nothing for the rear wheels spinning problem so
this won't provide much relief from spinning out. I recommend keeping this
high if you want a lot of understeer and low if you want the car to handle a 
little loosely.

4WD-Since you can adjust both the front and rear IT you have a chance to make
a little more of a dent in the handling of the car. By increasing the value
on the front wheels you will make the car understeer more and by increasing
the value of the rear wheels you will make the car oversteer more. It should
be noted that is nowhere near as huge a difference as is seen with TSD. Since
most 4WD cars handle pretty well i'd recommend keeping the front value low
around 10-15 and the rear value high about 40-50 if you want the car to 
corner a little better. 

Acceleration Sensitivity-Adjust how the LSD will act when the accelerator is

FR-I maxed this setting out at 60(by default it was 40)with the intial torque
at the same level and the car understeered significantly more than with the
previous settings. Throttle control is still vitally importantion with the
Z06 but this makes the car a little easier to drive, though do to the 
pronounced understeer you'll have to brake earlier when cornering. Same
recommendation as above: High if you want more understeer and for the car to
behave with a little more sanity and low if you want to try and slide around

4WD-Like the Initial Torque increasing the value to the Front wheels while
keeping the rear value low result in more understeer, making the car more
stable but at the cost of some cornering ability. Icnreasing the rear value
while lowering the front vaule will have the opposite effect of giving the
car more oversteer and cornering capabilities. Since 4WD cars are relatively
easy to handle I 'd recommend a Low Front/High Rear setting as you get the
benefits of increased cornering without the drawback of spinning out.

Deceleration Sensitivity-Adjust how the LSD will behave during deceleration

FR-I started by maxing this out(as well as the IT, and AS) and the understeer
in the car is extreme. On a brighter note this seems to do something to reduce
the amount that rear wheels spin at lower speeds making the car slightly 
harder to spin out. Also the car will be much more stable when braking the
higher this is. I'd recommend IT=20,AS=30,DS=40 with the Z06. It has a good
balance of understeer to control the car's worst excesses but not enough to
hamper the original poerful feel of the car.

4WD-Like everything else in this section(noticing a pattern?)increase the
Front Value/Decreasing the Rear value will make your car understeer even 
further. This will also make you car more stable while braking also. Likewise
Decreasing the Front Value/Increasing the Rear Value will make the oversteer
slightly. With this I have noticed the smallest change from other configs.
Honestly you can jsut leave this as is, at least in a 4WD car.

Final Thoughts- LSD is very important for FR cars as the handling properties
will change significantly according to what you set. 4WD cars not so much. You
will get a much larger effect on 4WD cars by adjusting the Brake Balance
controller and Torque Sensing Differential. Most importantly don't forget to
try out your configuration before you race, this way you have a handle on your
Here is where you can buy and adjust the Suspension system of your car which
can widly effect how your car handles and sticks to the road. When modifying
these setting attention should be paid as you can completely screw up your 
car with the wrong setup.

Fixed Sports Kit-3,000/Suspension kit which lowers the ride height and has 
stronger springs than the deafult suspension.

Height Adjustable Sports Kit-4,500/Suspension Kit in which you can change both
the ride height and shock absorbers.

Fully Customizable Kit-15,000/Racing Suspension which allows you to adjust all
aspects of your car's suspension including the Roll Bars, Camber and Toe Angle
Highly recommend that you get this.


Once you get the Fully Customizable Kit you can adjust various aspects of your
suspension and all of these will significantly affect how your car handles. 
You can really screw your car up big time if your tweak a section here the
wrong way so be very careful and clear on what you want your car to do before
making any adjustments.

Ride Height Adjustment(mm)-Here you can adjust the height of the front and
back of the car seperately. A lower Ride Height will give your car a lower
center of gravity and will increase will make your car more responsive. A
mistake alot of people make is setting their car too low to the ground then
when they go up a hill or go over a bumper their car gets tempermental and out
of control. If your car takes corners well then a lower front and a higher 
rear make sense as it will make the car corner better.

**IMPORTANT**You should make sure that for courses with a high amount of
elevation(Nurburgring and Trial Mountain come to mind)you should make your
Ride Height lower and your springs slightly higher.This will help counteract
all the jumping your car will be doing as a result of elevation change.

Spring Rate(kgf/mm)-You can adjust the hardness of your suspension here. The
harder you make the spring rate, the less your car will pitch and roll and
the sharper it will move. Also a rule of thumb is the lower the your car is
the stronger the springs should be to compensate for the shortened length. If
you springs are set high(just testing I set mine to 16.0 for the front and 
back)the car will be much more responsive on the track.

Dampers(Extension)-These are designed to reduce the amount that the springs
expand by limiting the amount that they can move. These should be set to be
stronger than when they are compressed. The deafult seems to be fine as the
car handles hill well and gets a little boost to it's cornering.

Dampers(Compression)-These are designed to reduce the amount that the springs
compress. This determines the resistance is when the springs are compressed 
and as a result shouldn't be too strong as it would make the suspension tight
and reduce the car's cornering. I'd recommend making them also slightly lower
than the default(My R8 is set at 4)

Anti-Roll Bars-You can adjust the stiffness of the Anti-Roll Bars here which
activate when the car rolls. As the game says you'll have a similiar effect
on your car's handling. You can adjust these to make your car understeer by
having the front Bars High and the rear Low. You can increase the oversteer
by doing th opposite. Since this is according to your driving style i'll let
you decide which to use.

Camber Angle-You can adjust the Negative Camber here which is when the top of
the tires lean inward more than the bottom when looking at the front of the 
car. This is quite effective as the higher the Negative Camber is, more of the
tire stays on the road when cornering. You don't want to set this too high
though as your car won't drive in a straight line. I've found that a angle
of 2.0 front/3.0 rear will improve cornering without negative side effects.
I've found that more than this it seems to make the car a little less 
responsive on corners. 

Toe Angle-Here you can adjust the Toe Angle which is the angle of the tires
when looked at from above. You can have a "Toe-in" which is when the front
of the tire are further in than the back of tire. Inversely "Toe-out" is
when the front of the tire is out further than the back. If you want the
car to understeer generally you should have a Toe-in for the front and rear
tires, this will also make your car more stable on corners.

Understeer- You should have a Toe-in for the front and rear tires this will
also make your car more stable on corners. A level of .30 for the front and
rear will cause sufficient oversteer. Recommended for FR/MR cars as they 
benefit from the understeer and cornering stability.

Oversteer- You should have a Toe-out for the front and rear tires as this will
make your car oversteer. I use a level of .55 for my 4WD cars as this gives
the cars more oversteer with no negative effects. Recommended for FF/4WD/MR
cars as they generally are much more stable on corners and handling and will
benefit from the added manuverability. 

Final Thoughts-Your suspension is very important and you can find significant
gains in this section if you take the time out to tune your car and constantly
adjust settings to find what works. You should spend time here getting your 
car to handle the way you want it to. 

Naturally,since these are things that stop your car, these are a vitally 
important part of any car especially a race car. Having enough stopping power
can shave vital seconds off of your lap times or just make your races easier.
I'm not sure why they got rid of the purchaseable brake Kit but you can 
control the Brake Balance Controller which is just as important as anything
for controlling your car.

Brake Balance Controller-This adjusts the sensitivity of your front and rear
brakes. As a result you can control whether your car will understeer or
oversteer by your decision in this area. If you put the Front and Rear brakes
to the front then your car will understeer but your brakes will have a 
significant amount of stopping power. If you put the balance to rear for both
brakes then your car will oversteer somewhat but your brakes will be weak. 
It's a good idea to have the Front Brakes at 3 or below and the Rear at 7 or
above if you want your car to oversteer. The inverse will also be true if you
want to understeer. 

All the power in the world doesn't mean anything if you don't have a good set
tires to transfer that power to the road. Here you can buy various sets of
tires for your car. There are many types and the situation for each will be
somewhat different.

Comfort Tires-Hard Tires which handle poorly. In previous GT games these would
have been a nicer version of simulation tires.

Hard-1,200/Worst grip of all tires
Medium-1,400/Still poor grip but not as bad as hard
Soft-1,600/Like being the smartest of the dumb kids these tires are the best
of the worst

Sports Tires-These are tires which are normally used for circuit racing and
as they handle decently but don't degrade as fast as racing tires.

Hard-6000/A little better than the comfort tires, these guys will last a while
Medium-7,000/A good balance of grip and durability at a cheap price
Soft-8,000/Hugs the road nicely but degrades faster than the other types, nice
if you don't want to spend 36,000 for the racing softs though there's really
no match to those.

Racing Tires-These guys are designed for racing and you shouldn't hesitate to
throw these on your car.

Hard-15,000/These tires handle fairly well and take a while to degrade. These
will be your best friend during endurance races as nothing sucks more than
having to pit every 5 laps.
Medium-25,000/These guys are a nice balance between grip and durability and
you can risk an endurance race with these though you'll have to pit more often
Soft-36,000/The big daddy of the racing tires. Don't let the price tag fool
you, these tires are worth all the money and then some.The grip they offer is
amazing and will make your car take corners like nothing. They have a really
crappy degradation rate though as they won't last more than a couple of laps.
But for every race thats 5 laps I strongly recommend using these tires.
- The people at Polyphony Digital who created this excellent game
- Gamefaqs for posting my FAQ
- My wife for not giving me hell for writing this
- You the readers for using this and finding it useful(hopefully)

Any questions or comments regarding this FAQ please E-mail me at: