I am using HP Tuners.I was running a SS4000 and now I have a SS3800.What are some changes I need to make?This thing Rocks one minute and the next its week.It has to do with MPH.it used to Rock from 40-50 mph thats not the case anymore.now it's more like 30-40 mph.on the expressway it's really tight how can 200 Flash rpm change that? Thanks!