L92 Cylinder Heads Install - It’s All In Your Heads

Putting Modified L92 Cylinder Heads on a 4.160-inch Bore Block

Ro McGonegal May 24, 2011 0 Comment(s)
View Full Gallery

Base 454 Runs

RPM Power Torque
2,600 201.1 406
2,700 214.5 417.2
2,800 226.1 424.1
2,900 239 432.9
3,000 253.7 444.2
3,100 270.1 457.5
3,200 282.6 463.8
3,300 298.7 475.4
3,400 314.1 485.2
3,500 328.7 493.3
3,600 341.7 498.5
3,700 356.8 506.4
3,800 368.6 509.4
3,900 378.7 510
4,000 386.2 507
4,100 394.3 505.1
4,200 402.6 503.4
4,300 412.2 503.5
4,400 423.3 505.3
4,500 433.6 506.1
4,600 441.2 503.8
4,700 449.5 502.3
4,800 457.9 501.1
4,900 462 495.2
5,000 466.4 489.9
5,100 469.1 483.1
5,200 473.3 473.3
5,300 472.9 468.6
5,400 474.8 461.8
5,500 471 449.7
5,600 473.3 443.9
5,700 466.5 429.9
5,800 464.9 421
5,900 462.2 411.5
6,000 460.9 403.4
6,100 453 390.1
6,200 450.5 381.6

With SD Heads

RPM Power Torque
2,600 210 424.3
2,700 221.2 430.3
2,800 235.3 441.4
2,900 250.4 453.5
3,000 265.5 464.9
3,100 281 476.1
3,200 296.8 487.2
3,300 313 498.2
3,400 327.2 505.4
3,500 339.8 509.9
3,600 351.8 513.3
3,700 361.4 513
3,800 372.3 514.6
3,900 383.5 516.4
4,000 396.8 521
4,100 408.5 523.4
4,200 419.9 525.1
4,300 429.8 524.9
4,400 439.2 524.3
4,500 446.6 521.3
4,600 455 519.5
4,700 462 516.2
4,800 469.9 514.1
4,900 477.9 512.3
5,000 483.7 508.1
5,100 488.4 502.9
5,200 493.4 498.4
5,300 496.4 491.9
5,400 487.8 484.2
5,500 501 478.4
5,600 500.2 469.1
5,700 499.8 460.6
5,800 499.2 452.1
5,900 495.2 440.8
6,000 491.5 430.2
6,100 487.8 420
6,200 482.9 409.1

With heads & cam

RPM Power Torque
2,600 215.3 434.9
2,700 226.2 440
2,800 238 446.4
2,900 249.6 452.1
3,000 263.1 460.5
3,100 276.6 468.6
3,200 291.4 478.3
3,300 305.9 486.9
3,400 320.4 495
3,500 333.8 500.9
3,600 345.7 504.4
3,700 357.9 508
3,800 366.9 507
3,900 377.5 508.4
4,000 390.3 512.4
4,100 403.2 516.5
4,200 414.3 518.1
4,300 427.3 521.9
4,400 437.6 522.3
4,500 446.9 521.6
4,600 455.4 520
4,700 463.2 517.6
4,800 472.5 517
4,900 480.6 515.1
5,000 485.9 510.4
5,100 492.1 506.8
5,200 497.2 502.2
5,300 500.7 496.2
5,400 502.6 488.8
5,500 505.4 482.6
5,600 505.9 474.5
5,700 503.5 463.9
5,800 502.4 454.9
5,900 499.4 444.5
6,000 499.1 436.9
6,100 492.6 424.1
6,200 489.2 414.4

Flow comparison

Stock L92
Lift Intake CFM Exhaust CFM
0.200 153 126
0.300 225 162
0.400 277 192
0.500 313 206
0.600 336 218
0.650 327 221
SD8801
Lift Intake CFM Exhaust CFM
0.200 154 117
0.300 223 179
0.400 282 202
0.500 323 219
0.600 349 232
0.650 356 237
GMPP CNC LS6
Lift Intake CFM Exhaust CFM
0.200 147 111
0.300 215 155
0.400 262 198
0.500 290 210
0.600 307 218

Sources

Scoggin-Dickey Parts Center
Lubbock, TX 79424
800-456-0211
http://www.sdparts.com
Red Line Synthetic Oil
Benicia, CA 94510
707-745-6100
http://www.redlineoil.com
Norris Motorsports, LLC
Winter Garden, FL 34787
407-616-2518
http://www.mikenorrismotorsports.com
Jesel
Lakewood, NJ 08701
732-901-1800
www.jesel.com
II Much Fabrication
Germantown, MD
www.iimuchfabrication.com
Trend
800-326-8368
www.TrendPerform.com

COMMENTS

subscribe to the magazine

get digital get print
TO TOP