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Small Block Chevy Parts Testing - Total Recall: Danger Mouse Part 9

A Recap Of Danger Mouse Tests

By Mike Petralia

Tests 1-4: Baseline, new intake manifold, roller-tip rockers, retard cam 2-degrees (October 2002).

Test 1: This represents what a typical 355-cid small-block would make if it had just been blueprinted but still had most of its stock components.
Max 395 tq, 308 hp
Avg 376 tq, 266 hp

From this point on, except for the changes listed, nothing else was touched.

Test 2: We installed a Weiand PN 8004 dual-plane intake manifold and leaned out the Q-jet.
Max 394 tq, 325 hp
Avg 380 tq, 270 hp

Test 3: We replaced the stock stamped-steel rocker arms with COMP Cams 1.5:1 roller- tip Magnum rockers.Avg 390 tq, 278 hp

Test 4: We retarded the cam 2 degrees.
Max 405 tq, 349 hp
Avg 390 tq, 278 hp

  Stock Weiand COMP Retard cam
  Baseline 8004 1.5 rockers -2 degrees
  Test 1 Test 2 Test 3 Test 4
RPM TQ HP TQ HP TQ HP TQ HP
2600 389 193 384 190 385 190 379 188
2800 385 205 381 203 382 203 377 201
3000 388 222 384 219 389 222 384 219
3200 395 241 391 238 396 241 395 241
3400 393 255 391 253 399 258 398 257
3600 393 270 394 270 402 276 401 275
3800 389 282 394 285 404 292 405 293
4000 383 292 390 297 404 307 403 307
4200 374 299 384 307 398 318 398 319
4400 363 304 375 314 391 327 395 331
4600 351 307 367 322 384 336 388 340
4800 337 308 354 324 374 342 380 347
5000 322 306 339 323 356 339 366 349
Max 395 308 394 325 404 342 405 349
Avg 376 266 380 270 390 278 390 278

Tests 5-8: Bigger 1 3/4-inch headers, full-roller rockers, bigger XE256H cam, stud girdle added (November 2002).

Test 5: Installed larger 1-3/4 Hooker headers. Compare Tests 4 and 5 and you'll see that average torque was down by 2 lb-ft, but peak toque and horsepower were up slightly, and average horsepower increased by 9. That's a fair trade to us.
Max 407 tq, 351 hp
Avg 388 tq, 287 hp

Test 6: Swapped in COMP Cams full-roller 1.5:1 aluminum rocker arms. Peak and average power didn't change at all (compare Tests 5 & 6), but we did get 5 more lb-ft of torque at 3,200 rpm.
Max 407 tq, 351 hp
Avg 389 tq, 288 hp

By Mike Petralia
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