[Mike Taylor 3601]

Disc material won't affect pedal pressure but material of disc will determine what base pressure you can run which affects pedal pressure.Sintered iron is most reliable forgiving consistent and don't cost much more if anymore but will out last everything else.I have ran a single disc in 600 hp 2900# car with base on pressure plate down as low as 300#s I was leaving line at 9600 so centrifical assisted some but did'nt have any weights added lower rpm car you could'nt get that low on pressure.BTW when you get low pressure setup make sure you use extra heavy duty return spring slightly smaller than hood hinge spring because pressure plate won't push back enough by it self with normal return spring
Mike Taylor3601