Can someone explain me why if i use the same torque converter on a big block and a small block it will stall at higher rps on the big block. I read that "the easier the motor can accelerate the sooner the torque converter will stall" . wouldn't it stall sooner with the B.B because of the amount of torque ¿?
No cause the big block will most always have more torque that increases the stall speed, so the time to get to max stall is going to be similar with big block producing higher numbers......
Because it's basically a fluid filled torque coupler. Therefore, applying more torque causes it to "slip longer" before it reaches that stall point and all power gets directed through towards the gearbox. That's why the old timers used to just swap a 6 cylinder converter in place of the v8 stuff. Torque instantly goes up and the stall speed rises with it.
