Tuning Rules In Reality

  • Thread starter Costas_Ch
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17
Greece
Thiva
VTec-_-Power
Hey guys…….

Here is what i know about tuning techniques in reality…. I am not of the best drivers, but it seems these rules are apply in gran truism too. (Sorry for my bad english. Some terms in don't know how to spell them in english).

1) Higher pressure in front tires -> Less Understeer (10psi more pressure than the suggested factor tire pressure) [NOT AVAILABLE IN GRAN TURISMO]
2) Lower pressure in front tires -> More Understeer (10psi less pressure than the suggested factor tire pressure) [NOT AVAILABLE IN GRAN TURISMO]
3) Higher pressure in rear tires -> Less Oversteer (10psi more pressure than the suggested factor tire pressure) [NOT AVAILABLE IN GRAN TURISMO]
4) Lower pressure in rear tires -> More Oversteer (10psi more pressure than the suggested factor tire pressure) [NOT AVAILABLE IN GRAN TURISMO]
5) Harder Antiroll Bar front -> More Understeer
6) Softer Antiroll Bar front -> Less Understeer
7) Harder Antiroll Bar rear -> More Oversteer
8) Softer Antiroll Bar rear -> Less Oversteer
9) More negative camber in front whells -> Less Understeer, Slip Angle reduction (0 untill -5 degrees)
10 More positive camber in front wheels -> More Understeer, Slip Angle increase (0 until +1 degrees) [NOT AVAILABLE IN GRAN TURISMO]
11) More negative camber in rear wheels -> Less Oversteer, Slip Angle reduction (0 until -4 degrees)
12) More positive camber in rear wheels -> More Oversteer, Slip Angle increase (0 until +1 degrees) [NOT AVAILABLE IN GRAN TURISMO]
13) More Toe In in front wheels -> Stable steering wheel in straight road, Comfortable journey but more understeer
14) More Toe In in rear wheels -> Less Oversteer when when "standing quickly foot off" the accelerator
15) More Toe Out in front wheels -> "Better" steering wheel, the vihicle steering faster and the understeer reduced. In straight road and in breaking, the front side of the car "rummaged" and the driver need to make "cats cradle" to fix the "fishing" of the front side of the car.
16) More Toe Out in rear wheels -> Btter steering of the rear side of the car in tight turns, less oversteer in tight turns, less traction for acceleration in the straight
17) More positive Caster angle in front wheels -> Better steering, lighter steering wheel, and better steering reset after the turning [NOT AVAILABLE IN GRAN TURISMO]
18) Less negative Caster angle in front wheels -> Reduction of the power on understeer that creates vibrations in FF cars while spining. [NOT AVAILABLE IN GRAN TURISMO]
19) Harder springs in front wheels -> Less understeer, less body roll of the front side of the car.
20) Softer springs in front wheels -> More understeer, more body roll of the front side of the car.
21) Harder srings in the rear wheels -> Less oversteer, less body roll of the rear side of the car.
22) Softer springs in the rear wheels -> More oversteer, less body roll of the front side of the car.
23) More breaks in the rear wheels -> Reduction of the corner entry understeer.
24) More breaks in the front wheels -> Reduction of the corner entry oversteer.
25) Harder rebound of the shock absorber in the front wheels -> Lees understeer at the corner exit.
26) Harder rebound of the shock absorber in the rear wheels -> Lees understeer at the corner entry.
27) Harder bumb of the shock absorber in the front wheels -> Less oversteer at the corner entry.
28) Harder bomb of the shock absorber in the rear wheels -> Less oversteer at the corner exit.
29) Softer rebound of the shock absorber in the front wheels -> Less oversteer at the corner exit.
30) Softer rebound of the shock absorber in the rear wheels -> Less oversteer at the corner entry.
31) Softer bumb of the shock absorber in the front wheels -> Lees understeer at the corner entry.
32) Softer bumb of the shock absorber in the rear wheels -> Lees understeer at the corner exit.
 
Last edited:
Great stuff. Particularly 25-32:tup:


I love the explanation of 15, broken English at its absolute best. I mean no offence by this. :D
 

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