tlowe, are you using a bov? Are you retarding the timing when the boost comes on? Also are you using a boost referenced fuel regulator? I run turbos on a BB Chev. using MSD 6BTM, works great. My wife had the same problem with her back as you are having, she took the 3 shots in the back last summer, it worked good for her. Good luck, and like your setup. Cya
