I agree 100%. Compression has a bunch to do with it. I just bumped my compression up to 12.5:1 from 11.26 with the same 270@50 SFT cam and the difference is noticeable. I see the difference in my video timer and speedo. 11.26:1 would run 60-112mph in 5 seconds. 12.5:1 runs 55-115 in 5.5 seconds. I drop it to second and shift to 3rd at 6500, when the shift lite comes on again I let off. Not real scientific, but i'm going to the track tomorrow, i'll let ya know for sure. I need to beat my best at 10.40.