20-26 TechFeatLT1Engine 3/20/14 10:19 AM Page 26
LT1 Feature
The unique sculpted piston top of the LT1 offers a valve relief for cam phasing, coated skirt notched for piston oiling jet, direct injection fuel bowl, LS3 style ring package, and a powdered metal forged connecting rod.
which minimize restrictions and tuning of exhaust gas flow. Equal length runners dump into wide mouth collectors which radiate noise reduction.
Premier Performance
used to offer exceptional lubrication under aggressive driving conditions. The new LT1 has an aluminum block with cast in place liners; nodular iron main caps compared to powered metal of GEN 4, new water jacket design, and crankcase revisions for optimized windage. The crankshaft is steel forged that has been induction hardened. The piston tops are sculpted with a valve relief for clearance of variable valve timing operation. A bowl in the center of the piston is
used for fuel optimization for use of direct injection. The main and rod bearings are polymer coated and the main bearings have a narrower oil groove than the GEN 4 for more bearing surface. The valve covers contain baffles, which separate oil and air from the crankcase gases. The integrated PCV system enhances oil life and longevity while reducing oil consumption that contributes to lower emissions. The headers are similar to the four-into-one design used on the LS7 and LS9. The runner geometry was optimized to develop cross-sections
26 March 2014 | High Performance Buyers Guide
For now, the engine has sparked interest by aftermarket suppliers to come up with more ways to bring a more powerful showing from this engine. And, you can expect upcoming performances to be playing in your shop in the not too distant future. So stay tuned, as we expect an award-winning performance from this engine — until is disappears from the racing stage, once again. â–
Main and connecting rod bearings are bimetal construction with a polymer coating.
Circle 226 for more information