The LS combos have the potential to make ground-pounding power, even in almost-stock trim. As usual, our bellies weren't yet full, though, and our minds were on the buzz for something more. We just knew our LS1 had more under its skin. Last month we left you with a stout LS1 package ("Magnificent," Jan. '09) that consisted of an LS1 with built internals, including the factory forged crank, a set of Probe 4340 lightweight I-beam rods, and lower-compression SRS series pistons. We topped it off with a set of Trick Flow's GenX Street/Strip CNC-ported lungs for deep breathing. For bump, we used Comp Cams' 230/236 hydraulic roller cam with 0.591/0.601-inch intake/exhaust on a 115-degree lobe separation.

But when you up the ante with MagnaCharger's latest and greatest supercharger system, it's a whole new ball game. It's critical that everything works in harmony and that air moves as freely as possible. The more air the better, and the longer that valve stays open, letting as much steam in as possible, the greater the ability to make power. During the last go-around, our supercharged LS1 produced a solid 652 hp and 579 lb-ft at a hair over 8 pounds of boost. Impressive? Of course, but we knew there was more to be had.

For the latest round of testing, we were all curious to see what would happen if a new camshaft choice was the only deviation from the last dyno session. Our 'stick for this test is a bit more radical and specifically designed for our positive-displacement MagnaCharger, featuring an additional 8 degrees of duration on the intake side and 10 degrees on the exhaust. Specifically, the new hydraulic roller from Comp came in at 238/246 intake/exhaust duration at 0.050 on a 114 lobe separation, with 0.605/0.613-inch intake/exhaust lift. We can undoubtedly say that we're pleased with the outcome. We still want to hear your thoughts, so tag along as we throw the Gen III powerplant back on the dyno and run it through its paces.

Quick Notes
What We Did

Determined whether or not a blower specific camshaft makes a difference.

Bottom Line
The gains are significant, but read on for the details.

Cost (Approx)
$400

CAMSHAFT SPECS
BLOWER SPECIFIC
Manufacturer Comp Cams
PN 54-000-11
Custom grind profile LS13729R/3733R
Type Hydraulic roller
Valve lift 0.605/0.613-inch
intake/exhaust
Duration at 0.050 238°/246°
intake/exhaust
Lobe separation 114°
PREVIOUS CAM
Manufacturer Comp Cams
PN 54-000-11
Custom grind profile LS1 3725R/3728R
Type Hydraulic roller
Valve lift 0.591/0.601-inch
intake/exhaust
Duration at 0.050 230/236
intake/exhaust
Lobe separation 115
DYNO DETAILS
Headers 1 3/4-inch Kooks long tubes w/ 18-inch extensions
BLOWER SPECIFIC
Advance 29 degrees
Max torque 581 @ 5,100 RPM
Max power 676 @ 6,800 RPM
Average torque 560
Average power 586
Average Boost: 7.8
PREVIOUS CAM
Advance 27 degrees
Max torque @ rpm 579 @ 5,000
Max power @ rpm 652 @ 6,600
Average torque 554
Average power 571
Average boost 7.9
BY THE NUMBERS
RPM LB-FT HP BOOST
3,800 566 410 7.8
3,900 563 418 7.8
4,000 562 428 7.7
4,100 564 441 7.7
4,200 567 453 7.7
4,300 569 466 7.7
4,400 572 789 7.7
4,500 574 492 7.7
4,600 577 505 7.7
4,700 579 518 7.6
4,800 579 530 7.6
4,900 580 541 7.5
5,000 580 552 7.5
5,100 581 564 7.5
5,200 581 575 7.5
5,300 579 585 7.6
5,400 578 594 7.6
5,500 576 603 7.6
5,600 573 611 7.6
5,700 570 619 7.6
5,800 568 627 7.7
5,900 566 636 7.7
6,000 564 644 7.8
6,100 561 651 7.8
6,200 557 657 7.9
6,300 551 661 7.9
6,400 546 665 7.9
6,500 540 668 7.9
6,600 535 672 7.8
6,700 529 675 7.8
6,800 522 676 7.8
6,900 514 675 7.8
7,000 505 673 7.8
7,100 495 669 7.8
Sources
Comp Cams
800.999.0853
compcams.com
Magnacharger
805.289.0044
magnacharger.com
Westech Performance
951.685.4767
westechperformance.com
 
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