I know what your saying. I'm sure the Sniper pipes are great. I had a set here and never had a chance to test them. I'm saying he never had any more portwork done to the motor over what I gave him. He has run as fast as a 6.2 on it the first few races he ever did with that motor. His problem was with consistency. He could run a 6.2 then run a 6.6. So I would say your data is inconclusive. He still strugles with this very same problem today. My guess is the tire, gear, chassis setup.