I recently started a new 4 day split  where I hit a body part twice a week.

is this good idea? I do less exercises per body part per workout,

What is the less number of exercises / sets / reps   per body part if hitting twice a week? 


research shows that yes working muscle groups at least twice per week depending on the program can be better for muscle and strength gains. Try the monthly gym workouts here or give this program a shot. http://www.workouttrainer.com/workouts/muscle-and-fitness-sports-specific/140