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

A Recap Of Danger Mouse Tests

By Mike Petralia

Test 13: World Products S/R Torquer cylinder heads (PN 042660-2 67S) were installed (67cc chambers, 170cc intake runner volume, 2.02/1.60 valves). No other changes were made.
Max 417 tq, 379 hp
Avg 399 tq, 303 hp

  S/R Torquer
  heads
  Test 13
RPM TQ HP
2600 375 185
2800 378 202
3000 393 225
3200 411 250
3400 413 267
3600 417 286
3800 416 301
4000 413 314
4200 412 329
4400 414 347
  S/R Torquer
  heads
  Test 13
RPM TQ HP
4600 409 358
4800 401 366
5000 395 376
5200 383 379
5400 367 378
5600 353 377
Max 417 379
Avg 399 303

Test 14-15: GMPP Vortec cylinder heads and COMP Cams 1.6:1 rockers (February 2003).

Since power fell off drastically in January's test, we knew we'd made some mistakes and had to redeem ourselves. To accomplish this we went back to The General and installed a new set of iron GMPP Vortec cylinder heads. We compared figures to the stock "camel hump" heads (Test 12) and found that even though the Vortecs actually dropped DM's compression by about 1/4-point to 9.25:1, that didn't stop them from adding more power. Then we swapped on our first set of 1.6:1-ratio rockers (previously only 1.5:1-ratio rockers would fit, due to pushrod interference) and were, once again, rewarded with more power.

Test 14: We installed iron GMPP Vortec 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) and an Edelbrock RPM "Air Gap" manifold (PN 7516).
Max 435 tq, 409 hp
Avg 413 tq, 330 hp

Test 15: COMP Cams 1.6:1 Magnum roller-tip rockers (PN 1418-16) were installed.
Max 440 tq, 416 hp
Avg 417 tq, 333 hp

By Mike Petralia
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