ebbfolls: thanks, i get it now. initially the double clutching method was done to overcome unsmooth shifting that before sync gearbox. matching the radial speed of the transmission and the engine making it easier to engage. sync gearbox now a days doesnt require double clutching.


now heel/toe correct me if im wrong what i understand when braking is keeping the rev high pass the powerband of the engine. so that when engaging (releasing the clutch)on a lower gear at the powerband so you always enough torque to push it.

i also do heel/toe engage on gear before corner so i can drift tight corners when raining. turn steering wheel tap the brake this makes a front tyres grip because at that instance the weight shifted forward giving more pressure on the front. release it press the gas then the back tyres will spin and looses grip.