The Vortec heads require self-aligning rocker arms, so we installed a set of COMP Cams roller-tip Magnum rockers (1.52:1 ratio, PN 1417-16) for the first test. Notice that we coated them with COMP Cams break-in lube so they'd be well oiled upon startup.The Vortec heads require self-aligning rocker arms, so we installed a set of COMP Cams rol 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 We also tried a set of 1.6:1 Magnum roller-tip rockers from COMP (PN 1418-16). This combination made the most power we've seen from Danger Mouse yet.We also tried a set of 1.6:1 Magnum roller-tip rockers from COMP (PN 1418-16). This combin There are several valve cover options for the center-bolt-style Vortec heads. We chose the least expensive, factory-stamped steel covers for this first outing.There are several valve cover options for the center-bolt-style Vortec heads. We chose the Danger Mouse also got its very own Summit Racing engine stand this month (we had been borrowing one from Westech until now). The four-legged stand and plastic drip tray make DM easy to work on and easy to clean up after.Danger Mouse also got its very own Summit Racing engine stand this month (we had been borr SOURCES COMP Cams Mr. Gasket Company 10601 Memphis Ave., #12 Cleveland OH 44144 216-688-8300 www.mr-gasket.com Denso Scoggin-Dickey (SDPC) 5901 Spur 327 Lubbock TX 79424 Edelbrock Dept. 5.0 2700 California St. Torrance CA 90503 310-781-2222 www.edelbrock.com Summit Racing Equipment P.O. Box 909 Akron OH 44309 McKenzie's Cylinder Heads Westech Performance Group 11098 Venture Dr., Unit C Mira Loma CA 91752 9-09/-685-4767 www.westechperformance.com « | 1 | 2 | 3 | View Full Article By Mike Petralia Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!
