AO Silver Member
Join Date: Mar 2003
I'm not sure what you are chasing when you want it 'stiffer'. In a straight line, for a given bump, only one spring rate will keep the tyre in contact with the road. Too stiff, and the car gets launched; too soft, and the car dives into the tarmac on jounce. For corners, too stiff will lead to understeer.
The 159/Brera/Spider leaves the factory with the front end too stiff (in roll and spring rate). Like most manufacturers Alfa want it to understeer to help unsophisticated drivers understand when to lift off. If it goes straight on the driver will deaccelerate.
It can be cured. Soften the front and leave the rear alone and it will neutralise towards oversteering. The rear will control roll and leave both front tyres to grip and turn. Stiff at the front will lift the inside front wheel.