| Spring Description | GM L67 Stock | |||||||
| Rated Install Height | 1.72 | Max Lift | Spring Rate Slope | |||||
| Coil Bind Height | 1.277 | 0.443 | 3.45 | |||||
| Rated Seat Pressure | 75 | Load Increase | ||||||
| Coil Bind Pressure | 228 | 153 | ||||||
| Spring Rate | 345.372 | 345.3724605 | ||||||
| Rocker Ratio | 1.6 | 1.7 | 1.8 | 1.84 | 1.9 | |||
| Engine Installed Height | 1.72 | |||||||
| Slope | 3.453724605 | 5.525959368 | 5.871331828 | 6.216704289 | 6.354853273 | 6.562076749 | ||
| Install Height | PSI @ Valve | PSI @ Cam 1.6 | PSI @ Cam 1.7 | PSI @ Cam 1.8 | PSI @ Cam 1.84 | PSI @ Cam 1.9 | Valve Lift | Lobe Lift |
| 1.77 | 57.73137698 | 92.37020316 | 98.14334086 | 103.9164786 | 106.2257336 | 109.6896163 | ||
| 1.76 | 61.18510158 | 97.89616253 | 104.0146727 | 110.1331828 | 112.5805869 | 116.251693 | ||
| 1.75 | 64.63882619 | 103.4221219 | 109.8860045 | 116.3498871 | 118.9354402 | 122.8137698 | ||
| 1.74 | 68.09255079 | 108.9480813 | 115.7573363 | 122.5665914 | 125.2902935 | 129.3758465 | ||
| 1.73 | 71.5462754 | 114.4740406 | 121.6286682 | 128.7832957 | 131.6451467 | 135.9379233 | ||
| 1.72 | 75 | 120 | 127.5 | 135 | 138 | 142.5 | 0.000 | 0.000 |
| 1.71 | 78.4537246 | 125.5259594 | 133.3713318 | 141.2167043 | 144.3548533 | 149.0620767 | 0.010 | 0.006 |
| 1.70 | 81.90744921 | 131.0519187 | 139.2426637 | 147.4334086 | 150.7097065 | 155.6241535 | 0.020 | 0.013 |
| 1.69 | 85.36117381 | 136.5778781 | 145.1139955 | 153.6501129 | 157.0645598 | 162.1862302 | 0.030 | 0.019 |
| 1.68 | 88.81489842 | 142.1038375 | 150.9853273 | 159.8668172 | 163.4194131 | 168.748307 | 0.040 | 0.025 |
| 1.67 | 92.26862302 | 147.6297968 | 156.8566591 | 166.0835214 | 169.7742664 | 175.3103837 | 0.050 | 0.031 |
| 1.66 | 95.72234763 | 153.1557562 | 162.727991 | 172.3002257 | 176.1291196 | 181.8724605 | 0.060 | 0.038 |
| 1.65 | 99.17607223 | 158.6817156 | 168.5993228 | 178.51693 | 182.4839729 | 188.4345372 | 0.070 | 0.044 |
| 1.64 | 102.6297968 | 164.2076749 | 174.4706546 | 184.7336343 | 188.8388262 | 194.996614 | 0.080 | 0.050 |
| 1.63 | 106.0835214 | 169.7336343 | 180.3419865 | 190.9503386 | 195.1936795 | 201.5586907 | 0.090 | 0.056 |
| 1.62 | 109.537246 | 175.2595937 | 186.2133183 | 197.1670429 | 201.5485327 | 208.1207675 | 0.100 | 0.063 |
| 1.61 | 112.9909707 | 180.785553 | 192.0846501 | 203.3837472 | 207.903386 | 214.6828442 | 0.110 | 0.069 |
| 1.60 | 116.4446953 | 186.3115124 | 197.9559819 | 209.6004515 | 214.2582393 | 221.244921 | 0.120 | 0.075 |
| 1.59 | 119.8984199 | 191.8374718 | 203.8273138 | 215.8171558 | 220.6130926 | 227.8069977 | 0.130 | 0.081 |
| 1.58 | 123.3521445 | 197.3634312 | 209.6986456 | 222.03386 | 226.9679458 | 234.3690745 | 0.140 | 0.088 |
| 1.57 | 126.8058691 | 202.8893905 | 215.5699774 | 228.2505643 | 233.3227991 | 240.9311512 | 0.150 | 0.094 |
| 1.56 | 130.2595937 | 208.4153499 | 221.4413093 | 234.4672686 | 239.6776524 | 247.493228 | 0.160 | 0.100 |
| 1.55 | 133.7133183 | 213.9413093 | 227.3126411 | 240.6839729 | 246.0325056 | 254.0553047 | 0.170 | 0.106 |
| 1.54 | 137.1670429 | 219.4672686 | 233.1839729 | 246.9006772 | 252.3873589 | 260.6173815 | 0.180 | 0.113 |
| 1.53 | 140.6207675 | 224.993228 | 239.0553047 | 253.1173815 | 258.7422122 | 267.1794582 | 0.190 | 0.119 |
| 1.52 | 144.0744921 | 230.5191874 | 244.9266366 | 259.3340858 | 265.0970655 | 273.741535 | 0.200 | 0.125 |
| 1.51 | 147.5282167 | 236.0451467 | 250.7979684 | 265.5507901 | 271.4519187 | 280.3036117 | 0.210 | 0.131 |
| 1.50 | 150.9819413 | 241.5711061 | 256.6693002 | 271.7674944 | 277.806772 | 286.8656885 | 0.220 | 0.138 |
| 1.49 | 154.4356659 | 247.0970655 | 262.5406321 | 277.9841986 | 284.1616253 | 293.4277652 | 0.230 | 0.144 |
| 1.48 | 157.8893905 | 252.6230248 | 268.4119639 | 284.2009029 | 290.5164786 | 299.989842 | 0.240 | 0.150 |
| 1.47 | 161.3431151 | 258.1489842 | 274.2832957 | 290.4176072 | 296.8713318 | 306.5519187 | 0.250 | 0.156 |
| 1.46 | 164.7968397 | 263.6749436 | 280.1546275 | 296.6343115 | 303.2261851 | 313.1139955 | 0.260 | 0.163 |
| 1.45 | 168.2505643 | 269.2009029 | 286.0259594 | 302.8510158 | 309.5810384 | 319.6760722 | 0.270 | 0.169 |
| 1.44 | 171.7042889 | 274.7268623 | 291.8972912 | 309.0677201 | 315.9358916 | 326.238149 | 0.280 | 0.175 |
| 1.43 | 175.1580135 | 280.2528217 | 297.768623 | 315.2844244 | 322.2907449 | 332.8002257 | 0.290 | 0.181 |
| 1.42 | 178.6117381 | 285.778781 | 303.6399549 | 321.5011287 | 328.6455982 | 339.3623025 | 0.300 | 0.188 |
| 1.41 | 182.0654628 | 291.3047404 | 309.5112867 | 327.717833 | 335.0004515 | 345.9243792 | 0.310 | 0.194 |
| 1.40 | 185.5191874 | 296.8306998 | 315.3826185 | 333.9345372 | 341.3553047 | 352.486456 | 0.320 | 0.200 |
| 1.39 | 188.972912 | 302.3566591 | 321.2539503 | 340.1512415 | 347.710158 | 359.0485327 | 0.330 | 0.206 |
| 1.38 | 192.4266366 | 307.8826185 | 327.1252822 | 346.3679458 | 354.0650113 | 365.6106095 | 0.340 | 0.213 |
| 1.37 | 195.8803612 | 313.4085779 | 332.996614 | 352.5846501 | 360.4198646 | 372.1726862 | 0.350 | 0.219 |
| 1.36 | 199.3340858 | 318.9345372 | 338.8679458 | 358.8013544 | 366.7747178 | 378.734763 | 0.360 | 0.225 |
| 1.35 | 202.7878104 | 324.4604966 | 344.7392777 | 365.0180587 | 373.1295711 | 385.2968397 | 0.370 | 0.231 |
| 1.34 | 206.241535 | 329.986456 | 350.6106095 | 371.234763 | 379.4844244 | 391.8589165 | 0.380 | 0.238 |
| 1.33 | 209.6952596 | 335.5124153 | 356.4819413 | 377.4514673 | 385.8392777 | 398.4209932 | 0.390 | 0.244 |
| 1.32 | 213.1489842 | 341.0383747 | 362.3532731 | 383.6681716 | 392.1941309 | 404.98307 | 0.400 | 0.250 |
| 1.31 | 216.6027088 | 346.5643341 | 368.224605 | 389.8848758 | 398.5489842 | 411.5451467 | 0.410 | 0.256 |
| 1.30 | 220.0564334 | 352.0902935 | 374.0959368 | 396.1015801 | 404.9038375 | 418.1072235 | 0.420 | 0.263 |
| 1.29 | 223.510158 | 357.6162528 | 379.9672686 | 402.3182844 | 411.2586907 | 424.6693002 | 0.430 | 0.269 |
| 1.28 | 226.9638826 | 363.1422122 | 385.8386005 | 408.5349887 | 417.613544 | 431.231377 | 0.440 | 0.275 |
| 1.27 | 230.4176072 | 368.6681716 | 391.7099323 | 414.751693 | 423.9683973 | 437.7934537 | 0.450 | 0.281 |
| 1.26 | 233.8713318 | 374.1941309 | 397.5812641 | 420.9683973 | 430.3232506 | 444.3555305 | 0.460 | 0.288 |
| 1.25 | 237.3250564 | 379.7200903 | 403.4525959 | 427.1851016 | 436.6781038 | 450.9176072 | 0.470 | 0.294 |
| 1.24 | 240.778781 | 385.2460497 | 409.3239278 | 433.4018059 | 443.0329571 | 457.479684 | 0.480 | 0.300 |
| 1.23 | 244.2325056 | 390.772009 | 415.1952596 | 439.6185102 | 449.3878104 | 464.0417607 | 0.490 | 0.306 |
| 1.22 | 247.6862302 | 396.2979684 | 421.0665914 | 445.8352144 | 455.7426637 | 470.6038375 | 0.500 | 0.313 |
| 1.21 | 251.1399549 | 401.8239278 | 426.9379233 | 452.0519187 | 462.0975169 | 477.1659142 | 0.510 | 0.319 |
| 1.20 | 254.5936795 | 407.3498871 | 432.8092551 | 458.268623 | 468.4523702 | 483.727991 | 0.520 | 0.325 |
| 1.19 | 258.0474041 | 412.8758465 | 438.6805869 | 464.4853273 | 474.8072235 | 490.2900677 | 0.530 | 0.331 |
| 1.18 | 261.5011287 | 418.4018059 | 444.5519187 | 470.7020316 | 481.1620767 | 496.8521445 | 0.540 | 0.338 |
| 1.17 | 264.9548533 | 423.9277652 | 450.4232506 | 476.9187359 | 487.51693 | 503.4142212 | 0.550 | 0.344 |
| 1.16 | 268.4085779 | 429.4537246 | 456.2945824 | 483.1354402 | 493.8717833 | 509.976298 | 0.560 | 0.350 |
| 1.15 | 271.8623025 | 434.979684 | 462.1659142 | 489.3521445 | 500.2266366 | 516.5383747 | 0.570 | 0.356 |
| 1.14 | 275.3160271 | 440.5056433 | 468.037246 | 495.5688488 | 506.5814898 | 523.1004515 | 0.580 | 0.363 |
| 1.13 | 278.7697517 | 446.0316027 | 473.9085779 | 501.785553 | 512.9363431 | 529.6625282 | 0.590 | 0.369 |
| 1.12 | 282.2234763 | 451.5575621 | 479.7799097 | 508.0022573 | 519.2911964 | 536.224605 | 0.600 | 0.375 |