Cadillac's LF4 engine is a further advancement of the LF3 engine currently found in the 2014 CTS Vsport. It has upgraded engine parts and approximately 6psi more boost! This is a first for Cadillac in the twin turbo world after a very successful supercharged history with the second generation CTS V. The DOHC twin turbo platform is a great start and we have a lot in our arsenal to make this motor even more efficient!
The unique cylinder heads feature a high-tumble intake port design that enhances the motion of the air charge for a more-efficient burn when it is mixed with the direct-injected fuel and ignited in the combustion chamber. The topology of the pistons, which feature centrally located dishes to direct the fuel spray from the injectors, is an integral design element of the chamber design, as the piston heads become part of the combustion chamber with direct injection.
“The high-tumble heads were developed with advanced modeling programs that helped us determine the optimal design in less time and with less trial and error,” said Richard Bartlett, assistant chief engineer. “Literally hundreds of simulations were performed to optimize the port flow, injector spray angle and pattern, and piston topology to produce a highly efficient yet powerful combustion chamber.”
Large, 38.3-mm intake valves and 30.6-mm sodium-filled exhaust valves enable the engine to process tremendous airflow. In some conditions, the continuously variable valve timing system enables overlap conditions — when the intake and exhaust valves in a combustion chamber are briefly open at the same time – to promote airflow scavenging that helps spool the turbochargers quicker for faster boost production. Hardened AR20 valve seat material on the exhaust side is used for its temperature robustness, while the heads are sealed to the block with multilayer-steel gaskets designed for the pressure of the turbocharging system. The heads also feature integral exhaust manifolds with upper and lower water jackets that provide uniform temperature distribution and optimal heat rejection.
Weapon X Motorsports experience in the boosted world will help you maximize the power and efficiency of what will soon be one of the most potent small displacement engines on the streets! Replacing the weak links and swapping out the restrictive parts will get you to your goal, whether its on the streets, the strip, or the track! We are the premier vendor for the Cadillac V Series aftermarket and we were at the top of the ATS V order list to dive into production on our extensive list of mods to make the Cadillac ownership experience your own! Our reputation for quality and service in the Cadillac market is unprecedented!
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LF4 Engine info:
The LF4 is a six-cylinder, 3.6-liter twin-turbocharged engine produced by General Motors for use in high-performance vehicles. It is a more powerful version of GM’s 3.6-liter V6 LF3. Part of GM’s high-feature (HF) V6 engine family, alongside the LF3 and LFX, the LF4 made its debut in the 2016 Cadillac ATS-V Sedan and 2016 Cadillac ATS-V Coupe.
Rated at an estimated 455 horsepower (339 kW) and 445 pound-feet of torque (603 Nm), the LF4 has several unique features that expand its performance range and support track capability, including:
These features contribute to optimal boost production and more immediate power delivery.
Approximately 90 percent of the LF4′s peak torque is available from 2,400 rpm to 6,000 rpm, meaning that the engine has broad torque curve that is conveyed in a feeling of responsive, sustained power at all rpm levels.
The ATS V's LF4 engine will take on some heat and cylinder pressure with 18psi from the factory with the twin MHI turbos. There are three types of heat transfers that can ...View Product