Combine the turkey and beef together. Form into four large patties. Pat them down so they are about 1/2 inch thick or thinner. Salt and pepper to taste.
Heat an electric skillet to Med-high heat. Spray with non-stick cooking spray, and then cook your patties until desired doneness.
Cut the burger patties in half so you have 8 "half moons" and put a slice of pepper jack on each half, let cheese melt and keep warm.
Meanwhile, spray your skillet again and place the tortillas on one at a time lay them on the skillet to warm and lightly brown. Just before the tortilla is done, lay one of the burger halves,straight side in the middle, on the tortilla.
Remove from heat and place quacamole, sour cream ,and salsa in the tortilla before your cheese cools, fold up taco style and enjoy.