What is everyones rpms? I was running between 8100-8200rpms. I changed the secondary to lower the rpms and seems that I lost acceleration against my friends. I put the spring back to stock, but haven't been able to run it. My shocks are still being revalved. I know peak torque is at 7700, so why would my sled be slower? Could my tach be off? I've asked this question a couple of times and no one seems to know or respond. How accurate are these tachs?