GRAN TURISMO CAR REVIEWS GT5 Racing Guide 


What is this racing guide for?
These pages are an attempt to make the Gran Turismo 5 racing experience more challenging. This is done by
using weighttopower ratios and various parts suggestions to configure our cars and trucks to more competitive levels.
How to use this racing guide
First of all, everything has been calculated by me via the English standard system of measurements. This
means I use pounds (lbs.) instead of kilograms (kg). I grew up with standard, it makes more sense to me, and I find
it easiest to use. But I understand lots of people grew up with metric. Problem is, you'll wind up having to
convert the pound/horsepower ratios if you want to totally convert to metric. That's a lot of work.
To use this guide most conveniently (with the least math) it's best to convert your car's weight from metric
to standard. We do this by multiplying kg by 2.204. So if you've got a car which weighs 1,425 kg...
1,425 kg x 2.204 = 3,104 pounds
It is also possible to convert from standard to metric. Everything will still work. Most of the ratios in this guide must be derived logarithmically. In other words, a car which weighs 1,800 pounds
will often need to have a different weighttopower ratio than one which weighs 2,100 pounds. I have created these ratios
by racing a variety of cars of different weights over time. So to figure out your car's ratio, use the following guide.
Let's say you have a Mazda Demio, and you're wanting to run it in the 2nd FF Challenge.
The Mazda weighs 2,116 pounds. The ratios for this particular race currently
look like this:
Clubman Route 53 Laps
(1,700) 19.77  86 hp (2,500) 21.18  118 hp
This means I have so far driven cars which weigh 1,700 pounds and cars that weigh 2,500 pounds. I have calculated
a poundtopower ratio for both ends of this spectrum. Since the Demio falls somewhere in the middle of these ratios, let's
find out how much power it should have to be competitive in this race.
1). We have 2,500 pounds and 1,700 pounds. First, subtract 1,700
from 2,500. This leaves us with 800 pounds.
2). Look at the lower pound
number for the Clubman race. In this case, it is 1,700 pounds. How much over 1,700 pounds does the Demio weigh? Well
it weighs 2,116 pounds. Subtract 2,116 from 1,700. 2,116  1,700 = 416 pounds. Write that number (416) down, unless you can remember it for a few seconds. 3). Now, let's subtract the horsepower (hp) figures. 118 hp  86 hp
= 32. Leave this number on your calculator. 4). We must divide this number (32) by the weight difference from Step 1. 32
/ 800 = 0.0400448536. When you get this figure, you don't have to write it down, just
leave it on your calculator's screen.
5). Now retrieve that number you wrote down (or kept in your head) for the last 20 or 30 seconds, which
was 416 pounds.
6). Back to the calculator, which still has that huge fractional number on its screen. Multiply 416 by this
number. So 0.0400448536 x 416 = 16.64. Leave this number on you calculator.
7). 16.64
is added to the minimum horsepower for the Clubman race, which is 86 hp. So 16.64 + 86 =
102.64. 8). THAT
FINAL NUMBER (102.64) is how much horsepower the Clubman race requires, assuming we keep the Demio's weight of 2,116
pounds intact. We can round 102.64 up to 103. The Mazda Demio, with its weight of 2,116 pounds, should have 103 hp to compete
in this race.
Does this guide actually work?
I find most of the time it does, although I also realize it's merely my way of challenging myself. ;) Those
of you who slog through all that math and then head to the tracks may find it's perfect, or that it's too easy or too
hard, depending on your level of game mastery.
This guide is, therefore, more of a guideline than an absolute rule. It is a place to at least start each
race series. PD doesn't actually give us any guidelines as to what is fair and what isn't. A driver can enter a Honda
NSX into the Sunday Cup if they want to, for instance, putting on racing tires and using as much power as the game
allows. My racing guide will outlaw such a car! The Performance Point (PP) system PD added for this game is
guesswork, in my experience. You won't know where to zero in your power without lots of experimentation. Why not get a decent,
workable number right from the getgo? That's what I'm saying.
Anyways, good luck and keep going.

