Did you use a tuner and lower your fan settings? If not, your car will heat right back up due to the lack of air flowing through the radiator. Stock fan settings are 217 low speed & 226 high speed so don't be surprised to see temps close to that if they are still at the stock settings.
Most use a DiabloSport tuner to do this, you may be able to pick up a used one and save you some money. The canned tunes drop them some but I think I set mine at 188 low/197 high. Don't want to set them too low or they will run all the time. The tuners show 3 settings (low, medium, high) but our cars only have low & high. Set the medium to the same setting as the high.