This can cause a lean issue that creates a ripe environment for detonation, which will reduce horsepower as the computer senses the detonation and begins reducing ignition timing along with other adjustments to elimination the detonation. In these types of scenarios, just one degree less of ignition timing can cost you 10-12 horsepower. Hot, more vaporous fuel also doesn’t atomize as efficiently, which can negatively affect the injector spray pattern and how the fuel mixes with the air, both of which can cause a loss of power and performance.
These LT-based engines are commonly referred to as EcoTec3 5.3L engines. They are all-aluminum small blocks, both of which incorporate Active Fuel Management (AFM), Variable Valve Timing (VVT), and are flex-fuel capable (E85). The engines also use direct fuel injection technology, which shoots fuel directly into the combustion chamber instead of the intake runner.
Detonation can occur if inlet air temperatures get too high and/or low-octane fuel is used. This will destroy the cast pistons in the LSA. Forged pistons are a smart upgrade. (The LS9 came with forged pistons from the factory.) Due to extremely high cylinder pressure, the heads can start to lift around 1,000 hp. At that point, you will need to basically build a whole new engine. The following upgrades will be required.
The NHRA kicked off its 2018 season with the Lucas Oil NHRA Winternationals two weeks ago. We gave you a recap of the top NHRA class winners here, but here’s a rundown of the Sportsman class winners. As the son of legendary NHRA announcer Dave McClelland, Kevin McClelland is no newbie to drag racing. In fact, his Super Gas victory at the Winternationals earned him his fifth national-event Wally. “This is really special,” McClelland said. “I won this race 21 years ago at my very first national event, and it’s been an awesome run.”