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Power Multipliers

ROCK ON
The power our 383-cid Mouse gained just by bolting on a set of COMP Cams Magnum roller-tip rocker arms made this whole thing worth the price of admission. The extra power and reduced heat and friction offered by the full roller Pro Magnum rockers in a 1.5:1 ratio also really makes them an attractive bolt-on.
  STOCK 1.52 MAGNUM 1.52 PRO MAGNUM          
RPM TQ HP TQ HP increase TQ HP increase over stock
3600 412 283 421 289 +6 417 286 +3
3800 425 308 431 312 +4 431 312 +4
4000 454 346 450 342 -4 450 343 -3
4200 463 370 466 373 +3 468 374 +4
4400 467 391 474* 397 +6 476 399 +8
4600 470* 411 473 415 +4 478* 419 +8
4800 467 427 470 430 +3 477 435 +8
5000 462 440 460 437 -3 470 448 +8
5200 452 448 454 450 +2 461 456 +8
5400 445 458 448 461 +3 458 467 +9
5600 437 466 440 469 +3 447 477 +11
5800 423 467* 427 471 +4 436 482 +15
6000 408 466 415 474* +8 423 483* +17
                 
Avg. 445 402 449 405 +3 453 410 +8
Max* 470 467 474 474 +8 478 483 +17

0511Phr Ratio 09 Z
The Hot Rockers system works by shifting the fulcrum pivot of the rocker arms as you drive. All rockers will shift together, so you cannot run different ratios on the intake and exhaust. The four-position fulcrum provides ratios from 1.1:1 up to 1.75:1 (higher and lower ratios can also be specified). An ECM shifts the ratios at user-defined rpm points via an electric motor mounted on the valve covers.
MORE RATIO MEANS MORE TIMING
As rocker ratio is increased, so too is valve timing. Note how changing from the stock ratio, which is actually closer to 1.46:1, to a true 1.60:1 increases your total valve duration by almost 20 degrees. This geometric increase is true for any cam in any engine.
 
COMP CAMS 292H MAGNUM HYDRAULIC CAM
Degrees valve duration
Lobe lift 1.46:1 1.60:1 Difference
.006 289.5 291.1 +1.6
.020 273.9 276.0 +2.1
.050 253.4 256.2 +2.8
.200 188.1 195.1 +7
.400 98.6 118.1 +19.5

Comp Cams
Memphis
TN

www.compcams.com
Everoc Industries(Hot Rockers)
Box 835067, Dept. EM
Richardson
TX  75083
Crane Cams
Daytona Beach
FL

www.cranecams.com
Iskenderian Racing Cams
www.iskycams.com
Crower Cams Jesel Inc.
Lakewood
NJ

www.jeselonline.com
Erson Cams
Carson City
NV

www.mrgasket.com
T&D Machine Products
4859 Convair Dr.
Carson City
NV  89706

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