GM Performance Parts CNC L92 Heads
If you thought the as-cast L92 heads were impressive, check out GM Performance Parts' CNC-ported performance version. Using enlarged 280cc rectangular intake and 100cc D-shaped exhaust ports, these puppies flow 332/201 cfm at .600-inch lift. A 68cc combustion chamber is standard, as are .510-inch lift springs and stock 2.165- and 1.590-inch valves. The ports are in the stock location, meaning only the L76 intake will fit-and as with the stockers, a 4.00-inch or larger bore is a must.
Tea TFS LT1/LT4 Heads
Only Total Engine Airflow could come out with an LT1/LT4 head that can compete with LS1s on the flow bench. Using the Trick Flow castings, TEA opens up the heads to either 200 or 220cc-perfect for strokers and forced induction. The 200cc head uses Ferrea 2.02/1.60 stainless valves to flow 294/257 cfm at .600-inch lift, while the 220cc heads use 2.08/1.60 valves to flow 310/257 cfm at .600-inch lift and 316/267 cfm at .700-inch. Valvesprings for up to .600-inch lift (heavy-duty valvesprings for solid rollers also available), 10-degree locks, and retainers are included. Both heads have an LT4 intake port, and the combustion chambers can be milled up to 56cc.
GM Performance Parts LSX Tall-Deck Block
Using an extra half-inch of deck height, now 9.75 inches, the LSX tall-deck block supports displacement of 500 cubic inches or more. Its semi-finished 3.990-inch bore can be taken out as far as 4.250 inches, and will mate easily to any LS family cylinder heads. However, the tall-deck will necessitate a custom intake manifold, or spacers for existing intakes, since the space between the intake ports has increased from the standard deck height, though GMPP plans to develop and make available intakes for this motor soon. The tall-deck version sports all the same quality materials and construction, including the six-head bolt design, but with more cubes to ensure it will be the foundation of the most powerful LS motors in the world.
GM Performance Parts LS2/LS3/LS7 Controllers
In order to make Gen IV swaps as easy as possible, GMPP developed its own "plug-and-play" controller kits. These stand-alone units are designed to require no recalibration or tuning with the desired Gen IV motor. Simply plug the motor into the controller using the supplied OEM-type wiring harness, compatible accelerator pedal (for electronic throttle), oxygen and MAF sensors, OEM-type fuse/relay center, and 12-wire bulkhead. The tach signal, malfunction indicator light, oil pressure, vehicle speed, etc., can all be tapped without even cutting the harness. The throttle, EFI, ignition, cooling fan(s), and fuel pump can be under the command of this wonderful little box, which is covered by a 12-month/12,000-mile warranty.
Compstar HD Connecting Rods
Callies subsidiary Compstar recently released a new HD Series I-Beam connecting rod for high-horsepower, high-rpm, big-displacement engines in LS1, LT1, and BBC applications. These value-minded rods have numerous features normally associated with more expensive rods, including AISI 4340 material, contoured tower flanges and pin end housing, excellent stroker clearance, and a parting line footprint increase of 23% for greater housing bore stability.