Lol. No offense but that sound like another made up number without any proof. Unless they’re running NOS like Tork there is no way they are adding another 100whp using the same
mods as people with ~490whp... If you want anyone to believe those results please back up your numbers with evidence otherwise everyone will always question what you say going forward.
I feel sorry for you. That’s the lowest baseline I’ve ever seen for our Stingers and you likely underpowered compared to everyone else.

Either that or your “about” 313 run had some serious heat soak and/or inexperienced dyno operators.
Like I said his baseline was “about” 325 which is right on point and on the low side for our Stingers. Even very conservatively he still gained around 150whp on motor only without any temporary power adders like NOS.
I admit 650whp with NOS is impressive for stock turbos, but we all know almost 200whp just came from the bottle. That’s why NOS is called “HP in a bottle” and a lot of people consider it cheating, but there is no denying it’s power gains.