How much timing on a racing gen 3

Now that the fuel tune has stabilized, I have too much power to keep it from spinning at some tracks. In 88 degree weather (2600 DA) when it hooks it pulls a 1.43 60', a 4.12 330' and a 6.50 8th mile@106mph. I've had it to 2 tracks. At one it hooks reliably (better track prep) and at the other it spins 50% of the time. I am trying to chassis tune/shock adjust/tire pressure that issue. We are getting into some weather in the 60's and 70's soon down here and I'm looking forward to some mid to low 6.40's if I can can get it to stay on the tire.