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LS3 Cam and Cylinder Head Swap - Late Crate Update

569 HP With A Head And Cam Swap? It's True. Check Out The . . .

By Richard Holdener, Photography by Richard Holdener


STOCK LS3 CNC HEADS COMP CAM
RPM TQ HP TQ HP
3,100 417 246 432 255
3,300 417 262 435 273
3,500 428 285 446 297
3,700 442 311 458 322
3,900 451 335 471 350
4,100 462 361w 494 386
4,300 471 386 509 417
4,500 482 413 512 438
4,700 484 433 514 460
4,900 483 451 517 482
5,100 480 466 521 506
5,300 474 478 521 525
5,500 466 488 517 541
5,700 454 493 509 552
5,900 438 492 497 559
6,100 420 488 487 566
6,300 403 483 473 568
6,500 386 478 459 569
6,700 369 470 443 565
6,900 348 457 -- --

AIRFLOW DATA: CNC-PORTED GMPP L76/L92 FLOWED WITH 4.065 BORE
Lift Intake Exhaust
0.200 150 105
0.300 222 140
0.400 260 168
0.500 298 190
0.600 332 201

PARTS LIST
DESCRIPTION PN SOURCE PRICE
Comp cam 281LRHR13 Comp Cams $417.59
Comp Cams valvesprings 26918 Jegs 174.99
Fast 102mm Big Mouth TB 54102 Morano Racing 558.99
GMPP L76/L92 CNC heads 88958698 Pace Performance 1,388.50
GM cam sprocket 12586481 SDPC* 28.59
GM LS3 controller kit 19201861 SDPC 1,506.39
GM muscle car oil pan kit 19212593 SDPC 125.80
GM harmonic balancer 12620556 SDPC 103.19
GM Y-body FEAD 19155067 SDPC 825.85
GMPP LS3 crate engine 19201992 Summit Racing 7,440.39
McLeod LS flywheel 460535 Summit Racing 425.30
*Scoggin-Dickey Parts Center

SOURCES
McLeod Industries
1600 Sierra Madre Circle
Pasadena
CA  92870
714-630-2764
www.mcleodind.com
Scoggin-Dickey Parts Center
5901 Spur 327
Lubbock
TX  79424
800-456-0211
http://www.sdparts.com
E3 Spark Plugs
Ponte Vedra
FL
http://www.e3sparkplugs.com
FAST (Fuel Air Spark Technology)
3400 Democrat Road
Memphis
TN  38118
877-344-8355
www.fuelairspark.com
Comp Cams Inc.
3406 Democrat Road
Memphis
TN  38118
800-999-0853
www.compcams.com
Chevrolet Performance Parts
P.O. Box 33170
Detroit
MI  48232
800-577-6888
http://www.gmperformanceparts.co
m
Lucas Oil
302 North Sheridan Street
Corona
CA  92880
951-270-0154
http://www.lucasoil.com
By Richard Holdener
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