I have a dyno chart of the LS1 before and after,but here is the data. look at the improvement in the upper RPMs.




STOCK FINAL

RPM HP TQ RPM HP TQ HP TQ
4.10 243.42 311.83 4.10 252.97 324.06 9.55 12.23
4.20 250.37 313.08 4.20 259.42 324.40 9.05 11.32
4.30 257.50 314.51 4.30 269.34 328.97 11.84 14.46
4.40 263.63 314.68 4.40 276.18 329.67 12.55 14.99
4.50 270.33 315.51 4.50 283.67 331.08 13.34 15.57
4.60 275.69 314.77 4.60 289.97 331.08 14.28 16.31
4.70 281.97 315.09 4.70 295.45 330.16 13.48 15.07
4.80 286.91 313.94 4.80 302.41 330.89 15.50 16.95
4.90 292.88 313.93 4.90 306.94 329.00 14.06 15.07
5.00 295.45 310.35 5.00 311.62 327.33 16.17 16.98
5.10 299.44 308.37 5.10 315.34 324.75 15.90 16.38
5.20 300.56 303.57 5.20 318.43 321.62 17.87 18.05
5.30 302.33 299.60 5.30 319.78 316.90 17.45 17.30
5.40 303.40 295.09 5.40 320.71 311.92 17.31 16.83
5.50 299.03 285.56 5.50 322.12 307.61 23.09 22.05
5.60 300.80 282.12 5.60 322.40 302.38 21.60 20.26
5.70 296.21 272.93 5.70 319.94 294.81 23.73 21.88
5.80 291.43 263.90 5.80 319.84 289.62 28.41 25.72
5.90 291.12 259.15 5.90 316.27 281.54 25.15 22.39
6.00 286.26 250.58 6.00 314.85 275.60 28.59 25.02
6.10 283.63 244.21 6.10 308.53 265.65 24.90 21.44
6.20 274.19 232.27 6.20 303.18 256.83 28.99 24.56
6.30 267.49 223.00 6.30 301.01 250.95 33.52 27.95
6.40 266.48 218.68 6.40 298.44 244.92 31.96 26.24