Strengths: Cooling & Reliability only.
Weakness: Any of the other 6 parts.
This is why:
Look at the Suppliers
Fuel +15
D-force +10
Accel +17
Brakes +15
Tyres +10
Handling +15
Now add in a Designer with same Strength as Supplier & add in a second Designer to cut out the Weakness.
Elite +50
Pro +40
Rookie +25
Not want to change Designers Strengths?
Then crank up the damage effects.
In Elite I can start with:
A 20 point Cooling & Reliability Car
A 43 point Cooling & Reliability Car
A 50 point Cooling & Reliability Car
They shouldn't have the same wear rates & all 3 of them should have a lot more damage than a 100 point Cooling & Reliability Car not the same rates.