|
86TOYO2k17: mechanical losses are what is spend on friction in various parts of transmission. Driveshaft or lighter flywheel or lighter wheels won't change a bit any of those losses. If you get upto speed then power needed to keep driving at that is absolutely same. Only things a bit affected is acceleration or slowing down, to get to that speed, when one needs to overcome rotational inertia/spend energy on that. Not mechanical losses. And if they are "affected", then it's because some dyno miscalculates power from acceleration wrongly assuming that power is only thing that changed, not because "X hp-s have been freed up, mechanical losses are less by Y%". Also, there is not much rotational inertia to be reduced with lighter driveshaft (unlike eg. flywheel or lighter wheels). Rotational inertia may depend on mass, rpms, and mass distance from rotating center. Flywheel has more of a second, it & wheels have mass & distance from center, but driveshafts have too little of diameter to make much difference. Yes, some very slight difference will be there (as from lightening in general) but probably below butt-dyno detection treshold. Main reason why one should consider aftermarket drive shafts is to get one that handles more torque then stock one if going high-gains forced-induction.
|