ZR-1 Net Registry Forums - View Single Post - Dual Mass vs. Single Mass Flywheels, Advantages/Disadvantages??????????

XfireZ51 · 08-17-2014

I have a Fidanza, used one in my 84 transplanted to a ZF-6, and it will rattle when hot and sitting at idle. Otherwise it's as quiet as the DM. I also use the
LT-1 sprung hub disc which helps keep rattle to a tolerable level. Finally, the rattle is a product of the trans gears and the greater imbalance from the motor, the greater the rattle. If the engine runs smooth, the rattle is minimal. At cruise, even in the 12-1300rpm, there simply is no rattle. BTW, helps to use the BMW Castrol trans fluid IMO.

08-17-2014	#20
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Dual Mass vs. Single Mass Flywheels, Advantages/Disadvantages?????????? I have a Fidanza, used one in my 84 transplanted to a ZF-6, and it will rattle when hot and sitting at idle. Otherwise it's as quiet as the DM. I also use the LT-1 sprung hub disc which helps keep rattle to a tolerable level. Finally, the rattle is a product of the trans gears and the greater imbalance from the motor, the greater the rattle. If the engine runs smooth, the rattle is minimal. At cruise, even in the 12-1300rpm, there simply is no rattle. BTW, helps to use the BMW Castrol trans fluid IMO.