Back in 2004, GM Performance Parts shipped us a complete LS1 to evaluate. Looking back, we really threw the hammer at this one. We tested every off-the-shelf cam, manifolds and cylinder heads, including a number of power-adders available.

While the momentum carried on for some time, we eventually set it aside for a few years.

Fast-forward to today. The guys at Magna Charger informed us that they were close to releasing an all-new TVS (Twin Vortices Series) supercharger system, and we were going to get the opportunity to check it out. Knowing that it was only a matter of time, we dusted off the LS and headed over to Coast High Performance in Torrance, California, where they tore it down and proceeded to freshen it up for us. Suffice it to say, the overall condition of the bottom end was excellent, showing minimal wear on the cylinder walls, and the main bearings had no indication of the hard life it lived as a dyno mule. At this point we decided to reuse the factory crank, but upgraded to a set of Probe 4340 lightweight I-beam rods and lower-compression SRS series slugs for the added boost to come.

Let's take a look into the new TVS huffer. Magna Charger offers two models. The 1900 series, while smaller, still has the ability to generate big power, being rated up to 800 hp. Next is the 2300 series, which is the model we're testing and has, incidentally, already been proven to make 950 hp using a GMPP LSX block. While belt slip has currently limited testing, the expected capacity is in the neighborhood of 1,100 hp. That's certainly more than you'd need for the street, but if you're looking for straightline performance, this forced induction setup is more than capable of getting any chassis to haul the mail.

When it comes to installing the system, it's not much different from a conventional intake manifold swap. Remove the factory manifold and drop in the complete TVS assembly. Of course if you're attempting to do this in a vehicle, it'll take a little more time, but the general principle is the same.

For cam selection, we decided on one that was designed to be a well-rounded camshaft profile that's good for both naturally aspirated and blown applications. Later in the issue, in "Whipple Stomp" (page 36) we describe the theory behind the lobe profiles for a positive-displacement system. Rather than rehashing the same info, we kept this test simple and are already planning to follow it up next month with a blower-specific grind.

What do we think of the system? For the LS family, this kit is simply amazing and hard to beat in a variety of ways. It's easy to install, and since it's a positive-displacement blower, the bottom-end torque numbers to be had are absolutely ridiculous and boost levels are pretty much instant from the moment you stab the throttle. Keep in mind that this goes for either model, but should you opt for the larger 2300 series, it's pretty reasonable to believe that you already have the cylinder heads and camshaft to complement the remainder of the combination. In this instance, we reused our factory LS short-block (albeit with stronger rods and pistons), topped it off with a set of Trick Flow's CNC-ported 215cc cylinder heads, and even took advantage of the electronic fuel injection by borrowing Westech's complete FAST XFI system.

Magna charger offers limited direct bolt-in kits for late model vehicles, however, you can pick and choose the components seen here for any application, namely LS powered transplants.

All said and done, if there's one thing we learned, it's that a beefed out Gen III powerplant with modern fuel injection is one stout package that can deliver both longevity and a serious seat-of-the-pants rush.

Quick Notes
What It Is

Magna Charger's new TVS supercharger for LS powerplants

Bottom Line
We made big power for the street!

Cost (Approx)
$5,100 for the long-block (minus machine work), starting at $6,600 for the TVS system

1. Magna Charger's 2300 series TVS system can generate up to 1,100 hp.

2. Electronics were handled by a complete FAST electronic fuel injection and throttle body.

3. Generating 8.4 psi is a 10-rib 3.400-inch pulley.

4. Front drive accessories are from a late-model Corvette.

5. MSD coil packs supplied the higher energy sparks

6. TFS 215 cylinder heads can flow as much as 320/259 cfm on the intake/exhaust at 0.600 lift.

FLOW BENCH
Lift Intake Exhaust
0.100 68 55
0.200 142 115
0.300 215 185
0.400 269 230
0.500 305 251
0.600 320 259
LS1 BUILD SHEET
Bore x Stroke 3.90 x 3.62
Rod center to center 6.125
Piston deck height 0.005
Chamber volume 64 cc
Rod bearing clearance 0.0024
Crank endplay 0.005
Piston ring endgap 0.024 top,
0.024 second
Main bearing cap torque 58 ft-lb
Main bearing/cross-bolt 20 ft-lb
Rod bolt torque 65 ft-lb
Head bolt torque 75 ft-lb
CAMSHAFT SPECS
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 degrees
SHOPPING CART
Company Description PN Price
ARP LS1 head studs 234-4317 289.69
LS1 Main studs 234-5608 183.95
Coast High Pistons 14222-003 561.75
Performance Rods 10069 lightweight I-beam 529.99
Rings 315-0037-005 121.95
Rod bearings CB-663HN 87.92
Main bearings MS-2199H 126.99
Comp Cams Camshaft 54-000-11 399.95
Pushrods I/E 7.500 7957-16 143
Roller rockers 19024-16 520
Fel-Pro Head gaskets (2) 1160R/1160L 85
Magna Charger Complete TVS system Call for applications 6,609.49
Trick Flow TFS 215 CNC 3060T001-C01 2,395.95
DYNO DETAILS
Headers 1 3/4-inch Kooks
long tubes w/ 18-
inch extensions
Advance 27 degrees
Fuel 91 octane unleaded
Max torque @ rpm 579 @ 5,000
Max power @ rpm 652 @ 6,600
Average torque 554
Average power 571
Average boost 7.9
  LB-FT HP BOOST
3,900 569 422 7.9
4,000 566 431 7.9
4,100 567 443 8
4,200 569 455 8
4,300 570 466 8
4,400 571 479 8
4,500 573 491 7.9
4,600 574 503 7.9
4,700 576 515 7.8
4,800 577 527 7.8
4,900 579 540 7.7
5,000 579 551 7.7
5,100 578 561 7.7
5,200 576 571 7.7
5,300 574 579 7.7
5,400 571 587 7.7
5,500 569 596 7.7
5,600 566 603 7.8
5,700 562 610 7.9
5,800 557 615 7.9
5,900 554 622 8
6,000 553 631 8.1
6,100 550 639 8.1
6,200 546 644 8
6,300 540 647 8
6,400 533 650 8
6,500 526 651 8.1
6,600 519 652 8.2
6,700 510 650 8.3
6,800 500 647 8.4
6,900 491 645 8.4
7,000 482 643 8.3
Sources
ARP
800.826.3045
arp-bolts.com
Coast High Performance
coasthigh.com
Comp Cams
800.999.0853
compcams.com
Fast
877.334.8355
fuelairspark.com
Magna Charger
805.289.0044
magnacharger.com
Probe Industries
310.784.2977
probeindustries.com
Trick Flow Specialties
330.630.1555
trickflow.com
Westech Performance
951.685.4767
westechperformance.com
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