A friend of mind GOZR pointed this out to me.
I16 added axis for "mixture" and "Oil radiator" and cooling flaps on Axis that is missing.. Haa!!! now it's cool.. working perfectly with Quadrant Try it.. make the controls way less troublesome!!
DCS World\Mods\aircraft\I-16\Input\I-16\joystick
{action = 3044, cockpit_device_id = devices.MOTOR_SYSTEM, name = _('Mixture Setting Axis')}, {action = 3048, cockpit_device_id = devices.MOTOR_SYSTEM, name = _('Oil Radiator Flaps Axis')}, {action = 3006, cockpit_device_id = devices.MOTOR_SYSTEM, name = _('Motor cooling flaps Axis')},