Hi MP-Willow !!!
According to Russian sources Su-1/3/5/7 were only the experimental airplanes and were never used in combat. Both Su-1 and Su-3 had problems with turbochargers. As a result, they were never finished and produced as serial fighters. As far as Su-5 and Su-7 are concerned,they were used to test combined powerplant. Su-5 was equipted with VRDK jet booster and Su-7 with a liquid rocket booster. The additional engines made them faster than other planes but without boosters their performances weren't remarkable to the piston powered aircrafts. Besides, the war was shortly over and the new jet planes appeared better ones.
regards