|Mercury Racing Reveals 32-Valve DOHC SB4 Head at SEMA|
FOND DU LAC, Wis., Nov. 3, 2015 – Mercury Racing revealed its new 32-Valve DOHC SB4 cylinder head and valve train this morning at the opening of the Specialty Equipment Market Association (SEMA) show in Las Vegas. SEMA consists of a diverse group of manufacturers, distributors, retailers, publishing companies, auto restorers, street-rod builders, re-stylers, car clubs, race teams and more.
Designed and developed to integrate with General Motors LS series hardware, the aluminum four valve head and dual overhead camshaft valve train 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:
· Improved intake and exhaust flow for improved performance
· Enhanced 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
This is Mercury Racing’s third year participating in the SEMA show. The QC4 automotive crate engine, unveiled at the 2013 SEMA show - received the SEMA Global Media Award that year and will again be featured at the show. Designed, developed and manufactured in-house, the QC4 is unique in the aftermarket high-performance powertrain 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 and Go
Several cars at the show are powered by Mercury Racing crate engines. Slick’s Garage of Palmetto, Fla., 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 will be shown outside Central Hall in the Arc Audio booth, #61006.
A 1971 Plymouth Barracuda, built by Salvaggio Automotive Design of Port Washington, Wis., 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.
Mercury Racing 32-Valve DOHC Small Block – Page 2 of 2
A 1650 horsepower QC4 powered Ultima GTR Supercar is featured in the Mercury Racing booth as well.
The Mercury Racing booth, #37005, is located in the Upper South Hall of the Las Vegas Convention Center. The SEMA show runs Nov. 3-6.
About Mercury Racing
Based in Fond du Lac, Wis., Mercury Racing, a division of Mercury Marine, is a leading provider of high-performance marine propulsion systems for discriminating boaters worldwide, offering an exciting and fulfilling power boating experience on the water. Using leading-edge technology, Mercury Racing produces high-performance outboards, sterndrives, propellers, parts and accessories. Mercury Racing also produces crate engines for the automotive aftermarket industry. Mercury Marine is a division of Brunswick Corp. (NYSE: BC), the world’s largest manufacturer of recreational products, including pleasure boats, marine engines, fitness equipment, and billiards.