The aluminum four valve head dual overhead camshaft valve train, designed and developed to integrate with General Motors LS series hardware, provides improved performance and durability versus a standard two-valve design. The head design adapts Mercury Racing’s proven high performance valve train to the robust, small block LS engine family.
Benefits of the DOHC four-valve design versus the typical LS pushrod layout include:
- Enhanced intake and exhaust port flow enables increased horsepower
- Higher engine rev limit for increased horsepower
- Valve train durability due to reduced mass and lower stresses
- Improved drivability due to milder camshaft timing at comparable horsepower levels
Designed, developed and manufactured in-house, the QC4 is unique in the aftermarket high-performance power train business. The all-aluminum, nine-liter 90 degree DOHC V8, twin-turbo engine optimizes power and torque throughout the RPM range. Electronic waste gate management delivers a broad, “mesa-shaped” torque curve under all operating conditions. Pulse-separated exhaust tuning improves low RPM turbocharger response. The QC4 is the quintessential crate engine and cannot be matched in terms of performance, run quality, durability and reliability.
Show & Go
Several cars at the show are powered by Mercury Racing crate engines. Slick’s Garage of Palmetto, Florida has built a custom street rod powered by a Mercury Racing built LS7 crate engine featuring the new DOHC SB4 valve train. Slick’s car is displayed outside Central Hall in the Arc Audio booth, #61006.
A 1970 Plymouth Barracuda, built by Salvaggio Automotive Design of Port Washington, Wisconsin highlights the Mercury Racing booth. It too features a Mercury Racing built LS 7 with DOHC SB4 valve train.
Salvaggio’s 1970 Dodge Charger, featuring turbocharged QC4 power, is on display in the Jet Performance Products booth, #23913, located in Central Hall.
A 1650 horsepower QC4 powered Ultima GTR Supercar is featured in the Mercury Racing booth as well. Our booth number is 37005, located in the Upper South Hall of the Las Vegas Convention Center.
It is going to be an action packed week. We’ll post updates from the show as the week progresses.