cream margerine and 2 tablespoons sugar substitute until light fluffy. add eggs, one at a time, beating well at med speed of electric mixer. combine flour, salt. Add to the cream mixture alternately with milk, beginning and ending with flour mixture. Beat at low speed after each addition. cut pineapple into 1/2-inch pieces, and gently fold into batter.
spoon batter into a 6-cup bundt pan coated with cooking spray. bake at 350 degrees for 45 minutes or until pick comes out clean.
combine pineapple juice and remaining 1 tablespoon sugar substitute, stirring till sugar dissolves. remove cake from oven and immediatley pour mixture over cake; let stand 5 minutes. remove cake from pan and cool. serve yummmm