Compression is about 8.5:1 I am running Ported heads, FR500 cam kit, JE pistons, ModMax H-beam rods, stock forged crank.
The meth will help me greatly. At the end of a 1/4 mile run I am seeing IAT's in the 170's and my tune starts pulling timing by about 160 degrees. I have no doubts I will pick up a small amount of power just from the cooling of the meth and then I expect to pick up 30-40 RWHP when I up the timing in my tune.
I guarantee you will pick up at least 40rwhp.