CLT Controller described a loss of separation event when trying to sequence a light aircraft onto final in a minimally spaced hole.

Narrative

I was working Final East and the winds were very strong out of the west. The same speed issued to 2 different aircraft was showing a difference of 30 KTS. A PA28 was on a right downwind for Runway 23 and a B737 was on the straight in. I asked the PA28 what his speed was and he said 140 indicating 160. I thought that was sufficient to get him into the next hole on final. I issued him a cautionary wake turbulence for the traffic he was to follow and turned him base at 3 1/2 mile in trail of the large he was to follow. It pulled away to over 4 miles which was perfect for his wake turbulence. I switched him to the Tower and then noticed he had slowed down to 80 KTS. The B737 was spaced tightly behind so I called the Tower and asked Local East if he slowed and if he did to tell him to speed back up. I was then told to break the PA28 out by the Supervisor but I told the Supervisor that I didn't have him on my frequency. I was then told that he would be broken out by Tower so I switched the B737 to Tower since I thought they had already started to break the PA28 out. As I was switching the B737 to the Tower I got called by a coordinator from the Tower to tell me they were breaking out the PA28. This caused a lot of aircraft to be slowed and or broken off the final to regain control. We have reduced separation within 10 miles so we can go down to 2 1/2 miles but I didn't have the splat 'T' function on at the time so I don't know exactly how close they got before the PA28 was broken off the approach. I would guess less than 2 1/2. [My] recommendation [is] to not try to force the situation with bad winds. Realistically; I think I should have been given a little more room from the ARR Controller to get the aircraft in there or the small should have been held out for a while until there was enough room for him to do 80 KTS down the final. Maybe the TMC could have flowed one away from me to make room.