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Vortec Cylinder Heads - Head Games

Danger Mouse Part 6

By Mike Petralia

Test 14: Install GM Vortec iron heads SDPC PN SD8060A (64cc chambers, 170cc intake runner volume, 1.94/1.50 valves) with COMP Cams 1.5:1 Magnum roller-tip rockers PN 1417-16, Edelbrock RPM Air Gap Vortec intake manifold PN 7516.

Test 15: Install COMP Cams 1.6:1 Magnum roller-tip rockers (PN 1418-16).

Test 13 Test 14 Test 15
RPM TQ HP TQ HP TQ HP
2600 375 185 383 190 379 188
2800 378 202 389 208 384 204
3000 393 225 406 232 404 231
3200 411 250 422 257 427 260
3400 413 267 429 278 433 280
3600 417 286 431 295 435 298
3800 416 301 429 311 437 316
4000 413 314 426 325 432 329
4200 412 329 425 340 433 347
4400 414 347 430 361 434 364
4600 409 358 433 379 439 385
4800 401 366 430 393 433 396
5000 395 376 421 400 423 402
5200 383 379 406 402 411 407
5400 367 378 395 406 401 413
5600 353 377 384 409 389 415
5800 N/D N/D 365 403 365 403
Max 417 379 435 409 440 416
Avg 399 303 413 330 417 333
SOURCES
McKenzie's Cylinder Heads Denso
Summit Racing Equipment
P.O. Box 909
Akron
OH  44309
Edelbrock
Dept. 5.0
2700 California St.
Torrance
CA  90503
310-781-2222
www.edelbrock.com
Westech Performance Group
11098 Venture Dr., Unit C
Mira Loma
CA  91752
9-09/-685-4767
www.westechperformance.com
Mr. Gasket Company
10601 Memphis Ave., #12
Cleveland
OH  44144
216-688-8300
www.mr-gasket.com
COMP Cams Scoggin-Dickey (SDPC)
5901 Spur 327
Lubbock
TX  79424
By Mike Petralia
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