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TFS Cylinder Head and Cam LS1 Package - Bolt On An LS1 TFS Head And Cam Package That Makes 500 HP - Hands On

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RPM TQ1 HP1 TQ2 HP2 TQ3 HP3 GAIN (TEST 1 VS. 2)
TQ HP
3,000 387 221 414 236 358 205 27 15
3,200 385 234 416 253 357 218 31 19
3,400 392 254 431 279 374 242 39 25
3,600 401 275 440 302 396 271 39 27
3,800 404 292 444 321 410 297 40 29
4,000 406 310 451 343 416 317 45 33
4,200 406 325 453 363 419 335 47 38
4,400 403 338 452 379 422 353 49 41
4,600 400 350 450 394 431 377 50 44
4,800 398 364 448 409 446 408 50 45
5,000 395 376 447 425 450 428 52 49
5,200 389 386 448 444 450 445 59 58
5,400 384 395 451 463 455 467 67 68
5,600 378 403 445 474 450 480 67 71
5,800 370 408 436 481 441 487 66 73
6,000 359 410 428 489 432 493 69 79
6,200 351 414 420 496 424 500 69 82
6,400 340 414 409 499 415 506 69 85
6,600 - - 389 489 397 499 - -
Peak 406 414 453 499 455 506
Average 385.4 345.6 436.6 398.1 420.2 380.3

Averages taken every 100 rpm between 3,000 and 6,400 for all four tests.

Note how even though Test 4 made more peak power, the average torque of Test 3 versus Test 4 is 16.6 lb-ft per rpm point greater. At 3,200 rpm, for example, the dual-plane makes 59 lb-ft more torque. That's too big a number to ignore!

PARTS LIST
DESCRIPTION PN SOURCE PRICE
TFS GenX LS1 Top-End kit K306-515-460 Summit Racing $3,299.95
TFS 220 as-cast LS1 cylinder head 3060T001 Summit Racing 1,699.95
TFS 215 CNC-ported LS1 heads 3060T001-C02 Summit Racing 2,395.95
TFS Track Max roller camshaft 30602003 Summit Racing 349.95
TFS chrome-moly pushrods 21407500 Summit Racing 86.95
Harland Sharp 1.7:1 roller rockers SLS17 Summit Racing 379.95
Head bolt kit '98-'03 LS engines 12498545 Summit Racing 25.95 (2)
Head bolt kit '04-later LS engines 17800568 Summit Racing 25.95 (2)
GMPP crank bolt 12557840 Summit Racing 4.95
GMPP head gaskets, LS1 12498544 Summit Racing 32.95
Fel-Pro 0.090-thick intake gaskets 1312-4 Summit Racing 31.99
GMPP exhaust gaskets 12617944 Summit Racing 20.39 (2)
Edelbrock LS1 intake and ignition kit 7118 Summit Racing 669.95
Holley 750-cfm HP mech. sec. 0-80528-1 Summit Racing 665.95
TFS roller timing chain 30678533 Summit Racing 129.95

SOURCES
Edelbrock (Carbs)
800-416-8628
http://www.edelbrock.com
Summit Racing
Akron
OH
800-230-3030
330-630-0240
http://www.summitracing.com/
MSD IGNITIONS
El Paso
915-857-5200
www.msdignition.com
Chevrolet Performance Parts
P.O. Box 33170
Detroit
MI  48232
800-577-6888
http://www.gmperformanceparts.co
m
Trick Flow Specialties
1248 Southeast Avenue
Tallmadge
OH  44278
330-630-1555
http://www.trickflow.com
Holley Performance Products
1801 Russellville Rd.
Bowling Green
KY  42101
270-781-9741
http://www.holley.com
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