The notable difference between the L83 and L8B engines is that the L8B includes GM’s eAssist powertrain, which combines the traditional gas-powered engine with an electric motor. The eAssist offers an additional:
Don Meziere went red by .008-second and Paul Mitsos was declared the victor in the Top Sportsman final. The cherry on top was a clean 7.098-second pass at 191.21 mph in his purple ’08 Stratus. It was Mitsos’ second career final at the national event level, and the Eastvale, CA-resident was exuberant as he claimed his first win in front of a large group of family and friends.
I would like to get about 350 hp out of the new engine and run in the 13s. Is this possible with my combination? Your crate 350 should be okay for use with a TPI system. We recommend checking the engine’s camshaft specifications. Most “computer-friendly” cam profiles are no bigger than 214-222 degrees duration at .050 and .450-.460 inches of lift with 112-116 degrees of lobe separation. If the cam in the new 350 is much over these figures, you should consider a different camshaft to ensure compatibility with the IROC’s computer.
Upgrading the camshaft will require the matching valve springs. Titanium retainers are also recommended. They will reduce the valve weight and prevent valve float. The trunnion bearings in the stock rocker arms are a known weak point. We strongly recommend a trunnion upgrade kit. Swapping in a set of full roller rockers is another option.