SEMA 2015

The Mercury Racing built LS7 crate engine featuring our exclusive 32-valve DOHC SB4 cylinder heads and valve train.
The Mercury Racing built LS7 crate engine featuring our exclusive 32-valve DOHC SB4 cylinder heads and valve train.

We’re excited to return for our third consecutive SEMA show where we are showing our all-new 32-Valve DOHC SB4 cylinder head and valve train.

The SB4 cylinder head was modeled off our our exclusive QC4 engine design.
The SB4 cylinder head was modeled off our our exclusive QC4 engine design.

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
Exhaust flow enhancements from the 32-Valve DOHC cylinder head.
Intake and Exhaust flow enhancements from the 32-Valve DOHC SB4 cylinder head and valve train.
The QC4 crate engine made its debut at the 2013 SEMA show.
The QC4 crate engine made its debut at the 2013 SEMA show.

We first traveled to SEMA in 2013 where we unveiled our QC4 automotive crate engine. The engine received the SEMA Global Media Award that year and it is featured at the show again this year.

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

Smooth Operator. The sound and run quality of the Mercury Racing built LS7 with our exclusive 32-Valve DOHC SB4 cylinder heads and valve train is amazing.
Smooth Operator. The sound and run quality of the Mercury Racing built LS7 with our exclusive 32-Valve DOHC SB4 cylinder heads and valve train is amazing.

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.

The '71 Cuda with Mercury Racing built 32-Valve DOHC LS7 power!
The ’70 Cuda with Mercury Racing built 32-Valve DOHC LS7 power!

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 '70 Charger with Mercury Racing twin turbo QC4 power!
Salvaggio’s ’70 Charger with Mercury Racing twin turbo QC4 power!

Salvaggio’s 1970 Dodge Charger, featuring turbocharged QC4 power, is on display in the Jet Performance Products booth, #23913, located in Central Hall.

The Ultima GTR Supercar with QC4 1650 power!
The Ultima GTR Supercar with QC4 1650 power!

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.

 

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26 thoughts on “SEMA 2015”

    1. Hi Ryan:
      Availability for the crate engine LS7 with SB4 heads will be Summer 2016. Pricing isn’t set yet but were estimating it to be in the area of $26 to $30K.
      Rick

  1. Hey guys, will there be an option to buy the heads in a kit for so they can be fitted to my engine.
    Also with the ls2 being gen4 would the heads fit?
    And finally, postage to the UK going to be on the cards?
    All the best
    Carl

    1. Hi Carl:
      Initially we will only be offering an LS7 based crate engine with our DOHC heads and valvetrain to the US market. Additional engine variants / kits and markets will be evaluated for future growth expansion.
      Rick

  2. So, by this being a “ls7 based” crate motor. Does that mean the block has to be modified. Or is it simply bolt on pieces with some mild machining possibly.

    By it being on the ls7 I can assume the smallest block it can function with is a probably a 6 liter before valves interfere with cylinder walls. Please let us know if it can go smaller.

    With that being said, assuming that this setup can fit on a standard 6.0 chevy block. Do you have an idea of availability and possible pricing on just the head conversion kit.

    Thanks,
    Dave

    1. David,
      Initially, our new small block four valve heads and valvetrain will only be offered on an LS7 based crate engine in the U.S. Additional engine variants / kits and markets will be evaluated for future growth expansion.
      Rick

      1. Rick
        I hope this message reaches you. I am working on a high level SuperCar that would benefit from the new 32valve heads. What’s the cost for the complete head conversion for the ls7? Do you offer different cams for different applications? Can the heads support and reach 9k RPM’s? Will they work on the LSX engines? I’m building an LSX427 dry sump motor that needs to reach 9K RPM’s and hold a ton of boost. Do you also offer a twin throttle body intake for the heads? Estimated HP levels north of 2000. Estimated top speed north of 300MPH in a 2500 pound mid engine SuperCar. Can you offer the 9.0L twin turbo motor in a 9K RPM redline and 2000+HP?

        1. Hi Vinny,
          I’ve forwarded your message to our automotive business development manager. We will followup with you once he returns to the office.
          Rick

  3. I have an 2004 LS1 in my 1958 corvette. Can these heads be put on that engine and if so how much hp difference are we talking from the original heads.
    Finally what’s the price and availability??
    Ron

    1. Hi Ron. The SB4 (small block four valve) cylinder heads and DOHC valve train is being developed to adapt to the current LSX-LS7 engine family.They will be released as part of a turn key crate engine this Fall.

      Rick

  4. Hello Rick. As many others I’m also interested in just the cylinder heads alone. I do hope that at some point they are offered alone as a kit as one engine doesn’t fit all applications. Your current engine package is nothing short of amazing although a different combination is needed in some applications and some of us can’t afford the price point for a turn key engine in its current configuration. I’m also very curious in intake runner volume and combustion chamber volume if you are able to release that information it would be great! I’ve done some process validation engine dyno testing for Mercury Marine in the past on several engine families while working for SRC Automotive, Bert Akerman would have been the engineering contact. I logged about 1,200 hours on the engine dyno, too bad it wasn’t with one of these engines! I’ve been waiting for this day to come for a set of 32 valve heads to be available, this will be the second time Mercury Marine has done what GM should have done. Thumbs up on the good work! Now sell us some cylinder heads lol! I’ve got a good lightweight rolling chassis here in my garage in waiting.

    1. Hello Dustin. There is definitely strong interest regarding our SB4 (small block four valve) cylinder head & DOHC valve train project. We’ll keep you posted on specs and availability as we get closer to the Fall launch.

      Rick

  5. I would really like to know pricing when available. I want to do a complete engine bay conversation. Fab and all if needed and put this in my 04 Honda ody. Would this engine be able to handle 4 wheel drive too if possible? Thanks!

    1. Hi Tyler.
      The SB4 crate engine will be available in the Fall. We will be posting the information on the blog as soon as its released.
      Rick

    1. Hi John:
      Our all new SB4 crate engine will be revealed on opening day at SEMA, Tuesday, November 1. We will be taking orders at the show with production slated for January.
      Rick

  6. LIKE TO KNOW IF THE SB4 HEADS AND UPPER END IS UP FOR SALE TO THE PUBLIC YET. WE WILLBE USING ALL AFTER MARKET SHORT BLOCK THANK U BILLY

    1. Hi Billy. The SB4 DOHC cylinder head kit will not be available on its own. The complete SB4 7.0 engine we showed at SEMA this year goes into production in February.
      Rick

  7. Please excuse me for being impatient 🙂 to add to my comment from yesterday. I would love to be able to get my hands on a set of these and here is why. I build extremely high rev LS base engines. My main limitations are valvetrain being unreliable and exceedingly outdated components. I understand people (myself included) absolutely love the compact versatility and simplicity the LS family has to offer. But it’s time to move on and keep up progression with research and development. I would absolutely love to get my hands on a set of these sb4 heads to make a prototype engine. I am sure you guys at mercury racing would be absolutely woah’d. If you would like to contact me, I listed my email above. I would like to speak with an engineer and share ideas.

    1. Hi Michael:
      We are not offering the 4-valve heads and valve train as a kit. The SB4 7.0 is only available as a complete engine via our distributor SpeedKore, Call
      262-421-8612 and select Option 2; Engine Integration.
      Rick

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