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.
What It Is
Magna Charger's new TVS supercharger for LS powerplants
We made big power for the street!
$5,100 for the long-block (minus machine work), starting at $6,600 for the TVS system
We replaced the factory slugs and connecting rods with a set of Probe Industries SRS serie
Up top we placed the factory lifters back into their original trays, which keeps the lifte
When it came to the remainder of the short-block, it was simply left to a good cleaning. W
To keep the heads in place, we went with a set of ARP head studs and sealed them up with F
Heads of choice for this operation was a set of 13.5 degree Trick Flow GenX Street/Strip C
When ordering, be sure to specify whether you have an LS1 or LS2 block. The LS1 heads come
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.
Finishing up the bottom end, we added the factory oil scrapper and pick-up, and from there
For the cam we went with a Comp custom grind that had 230/236 duration at 0.050 with 0.591
These Comp Cams Ultra-Gold aluminum rocker arms are the latest hot items for the company's
Installing the TVS system is similar to a manifold swap. Ours came complete with the fuel
The TVS system uses a rear drive mechanism to draw air directly into the intake. To do thi
From the rear, you can see how the supercharger's carbon fiber driveshaft is connected to
Supplying the water to the intercooler is an external water pump that is included with the
Magna Charger's bypass mechanism is smart in that it constantly regulates pressure levels
|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, |
|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 |
|Duration at 0.050 ||230/236 |
|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-
|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 |
|Coast High Performance|
|Trick Flow Specialties|