What lines did you change? Was it only m_aeroSlipStreamAirDensityScaleDrag value=?
Dirty air (all options):
<m_aeroSlipStreamAirDensityScaleLift value="1.7" />
<m_aeroSlipStreamAirDensityScaleDrag value="0.85" />
Option with realistic damage:
<F1SuspensionDamage>
<SpeedThreshold value="1.5" />
<FrontDamageScale value="1.00" />
<RearDamageScale value="1.00" />
<WheelDetachScale value="1.000000" />
<PartsDetachScale value="0.75" />
</F1SuspensionDamage>
<F1WingDamage>
<SpeedThreshold value="2" />
<DamageScale value="0.0001" />
<ChassisDamageMultiple value="0.9" />
<SideDetachScale value="0.25" />
<FullDetachScale value="0.5" />
Option with indestructible MyTeam car:
<F1SuspensionDamage>
<SpeedThreshold value="7" />
<FrontDamageScale value="0.001" />
<RearDamageScale value="0.0001" />
<WheelDetachScale value="1000.000000" />
<PartsDetachScale value="1000.0" />
</F1SuspensionDamage>
<F1WingDamage>
<SpeedThreshold value="3" />
<DamageScale value="0.0001" />
<ChassisDamageMultiple value="0.8" />
<SideDetachScale value="1000.5" />
<FullDetachScale value="1000.99" />