Remove the tip of the chicken wings and discard. Separate the wings into two pieces. Rinse well under cold running water. Pat dry with a paper towel.
Combine together brown sugar, garlic, lime juice, turmeric, fish sauce, black pepper and oil in a large bowl. Season with salt. Set aside.
Add chicken to the bowl, and coat well with the sauce. Marinate in the refrigerator for at least 1 hour or overnight if possible.
When chicken is ready to cook, preheat grill.
Arrange the wings over the grill in one layer. Grill, turning occasionally, for 20-25 minutes or until chicken is cooked through.