Although it's only a couple of months old, DM gets a fresh oil change because dyno abuse is tough. We poured in 5 quarts of 76 Racing 10W-30 motor oil-that should take care of DM for a while.Although it's only a couple of months old, DM gets a fresh oil change because dyno abuse i 2nd Series Of Dyno TestsFor each series of tests, we'll number them consecutively, starting with the last number of the previous month's tests. We'll also list the last test from the previous month so you'll have something to compare the new tests to. This month our first new test is number 5. Unless listed, no other changes were made for any test. Test 4: Last test from last month. Weiand 8004 intake, COMP Cams 1.5 roller-tip rockers, Carb Shop Q-jet, COMP Cams 246PE cam (246/263 adv duration, 203/212 duration @ .050, .429/.438 valve lift, 110 lobe separation) retarded 2 degrees. For a last stab at some extra power we installed a COMP Cams stud girdle for Test 8. It actually hurt power a little so we'll take it off next month and save it for when we have much stiffer springs and run at much high rpm.For a last stab at some extra power we installed a COMP Cams stud girdle for Test 8. It ac Test 5: Install 1 3/4-inch Hooker Super Comp headers and Flowmaster 3 1/2-inch mufflers. Test 6: Install COMP Cams 1.5:1 full-roller aluminum rocker arms. Test 7: Install COMP Cams XE256H cam (256/268 adv duration, 212/218 duration @ .050, .447/.454 valve lift, 110 lobe separation. Test 8: Install COMP Cams stud girdle. Test 4 Test 5 Test 6 Test 7 Test 8 RPM TQ HP TQ HP TQ HP TQ HP TQ HP 2600 379 188 377 187 380 188 387 191 384 190 2800 377 201 381 203 382 204 394 210 386 206 3000 384 219 390 222 391 223 401 229 398 227 The first test (Test 5) was to see if 1 3/4-inch headers would help or hurt. They added horsepower (+9 average, see Test 5) and low-end torque (+6 @ 3,000 rpm), so we left them in place.The first test (Test 5) was to see if 1 3/4-inch headers would help or hurt. They added ho A new COMP Cams XE256H camshaft was installed 2 degrees advanced for Test 7, and boy, did DM like that! Low-end torque increased by 12 lb-ft at 2,800 rpm, and DM was now making over 400 lb-ft by 3,000 rpm.A new COMP Cams XE256H camshaft was installed 2 degrees advanced for Test 7, and boy, did We installed a set of full-roller rocker arms from COMP Cams for Test 6. Unfortunately, we can't increase the rocker ratio or the pushrods will hit the stock heads, so we kept the same 1.5:1 ratio. The rockers gave us 5 more lb-ft of torque at 3,200 rpm.We installed a set of full-roller rocker arms from COMP Cams for Test 6. Unfortunately, we Did you know that you can basically degree-in your camshaft using a degreed balancer like this one from Fluidampr? Since most dampers are marked off up to 60 degrees BTDC, it's easy to check intake valve opening right on the damper, as long as your timing pointer is dead on.Did you know that you can basically degree-in your camshaft using a degreed balancer like 3200 395 241 396 241 401 244 411 250 408 249 3400 398 257 400 260 403 261 413 267 410 265 3600 401 275 403 276 405 277 413 283 411 281 3800 405 293 407 294 406 294 413 298 413 299 4000 403 307 405 308 407 310 412 314 410 312 4200 398 319 401 321 402 322 406 325 407 325 4400 395 331 395 331 367 332 402 337 402 337 4600 388 340 387 339 388 340 394 345 394 345 4800 380 347 380 347 380 347 385 352 385 352 5000 366 349 368 350 368 350 375 357 373 355 5200 N/A N/A 354 350 353 349 348 354 358 355 5400 N/A N/A N/A N/A 339 349 348 357 345 355 5600 N/A N/A N/A N/A N/A N/A 334 356 331 353 Max 405 349 407 351 407 351 413 357 413 356 Avg 390 278 388 287 389 288 396 293 395 292 SOURCES COMP Cams Fluidampr Springville NY 7-16/-592-1000 fluidampr.com Meziere Cooling Systems 220 S. Hale Escondido, CA 92029 Summit Racing P.O. Box 909 Akron OH 44309-0909 800-230-3030 www.summitracing.com Westech Performance Group 11098 Venture Dr., Unit C Mira Loma CA 91752 9-09/-685-4767 www.westechperformance.com « | 1 | 2 | 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!
