Mercury Racing Reveals SB4 7.0 Automotive Crate Engine

The all new Mercury Racing SB4 7.0 automotive crate engine.
The all new Mercury Racing SB4 7.0 automotive crate engine.


Greetings from Las Vegas! We are here for the 50th Anniversary SEMA Show where we just revealed our latest automotive aftermarket crate engine, the SB4 7.0. The 32-Valve DOHC V-8 was designed, developed and manufactured in-house.

The 32-valve cylinder head and DOHC valve train design is a decendant from our 9.0 QC4 engine platform.
The 32-valve cylinder head and DOHC valve train design is a decendant from our 9.0 QC4 engine platform.

The naturally aspirated, 7.0 Liter engine features Mercury Racing’s exclusive aluminum four valve cylinder heads and dual overhead camshaft valve train integrated with a LS cylinder block packed with Mercury Racing designed and specified hardware.

This proven valve train, which greatly enhances engine durability over a standard two-valve design, enables the engine to produce a staggering 750 horsepower at 8000 RPM on pump fuel!

Benefits of the DOHC four-valve design versus the typical LS pushrod layout include:

  • Improved intake and exhaust flow enables increased engine performance
  • Efficient, high tumble four valve combustion
  • Low mass, high stiffness design reduces stresses and enables smooth high RPM operation and long life
  • Improved drivability due to optimized camshaft timing at comparable horsepower levels

Engineering Excellence

Mercury Racing is unique in the high performance powertrain business in that we design and develop fully integrated systems.

Mercury Racing is unique in the high performance powertrain business in that we design and develop fully integrated systems. We even go as far as developing our own electrical and engine management systems. Our proprietary powertrain control module, featuring internally written software, provides the opportunity for customization and application specific needs.

Computational Fluid Dynamics (CFD) and GT-Power engine performance simulations were used to develop an optimized intake manifold featuring dual throttle bodies for maximum power and efficiency.

The Mercury Racing SB4 7.0 was developed utilizing 3D simulations and analyses on airflow, cooling, fuel and lubrication systems. Intense finite element analysis (FEA) studies were conducted on the head, block and rotating components to ensure an efficient and reliable powertrain.


Tests are conducted to calibrate engine management systems, evaluate in-cylinder combustion, and measure timing drive dynamics and torsional excitation, just to name a few

Prototype testing is where the rubber meets the road. Mercury Racing conducts fired engine, motored engine, and dynamic rig testing. Tests are conducted to calibrate  engine management systems, evaluate in-cylinder combustion, and measure timing drive dynamics and torsional excitation, just to name a few. Mercury Racing people, capabilities, and facilities are recognized through ISO 9000 and EU RCD certifications.

Dressed to Thrill

SB4 7.0 engines are sold as turn-key, ready to run engines. This includes a Mercury Racing engine control system and custom styled engine cover with SB4 7.0 cover graphics. Exhaust and engine front drive components (power steering, alternator, air conditioner pump, pulleys, belts and related brackets) are not included.


An engine front drive accessories kit is available. The kit consists of the necessary brackets, fasteners, belts, idlers, and pulleys to attach components such as the power steering pump (which is included) and an alternator or air conditioning compressor (which may be sourced elsewhere).

SB4 7.0 compatible aftermarket alternator and air conditioning compressor:

  • AC Compressor: AC Delco ~ PN: 1522274
  • Alternator: Powermaster ~    PN: 58247

An Analog Gauge Interface (AGI) kit, compatible with both digital and analog gauges, is also available.

Show & Go

The SB4 7.0 development vehicle - a 2001 Ultima GTR supercar.
The SB4 7.0 development vehicle – an Ultima GTR supercar.

This is our fourth consecutive SEMA show.  Our main booth, #37005, is located in the Upper South Hall of the Las Vegas Convention Center. An SB4 7.0 is featured in their development vehicle, a mid engine Ultima GTR Supercar. The Ultima is flanked with two SB4 7.0 static displays, one fully dressed and one cutaway to reveal exclusive features. A fully dressed SB4 7.0 is also displayed in SEMA’s New Product Showcase, also in the Upper Show Hall.  Edelbrock, booth #22643 Central Hall, is displaying the SB4 cylinder head they cast for us.

TANTRUM is a SEMA 2015 GT Awards - Best Domestic Build, was featured on Jay Leno's Garage and will be seen in the the nxt Fast and Furious movie - Fast8. In US theaters, April 14, 2017.
SpeedKore’s TANTRUM, a 1970 Dodge Charger powered by a one thousand, six hundred and fifty horsepower Mercury Racing QC4 crate engine.

We are proud to display one of SpeedKore’s most popular builds to showcase our potent QC4 1650 crate engine. Deemed TANTRUM, the 1970 Dodge Charger earned a Gran Turismo award for best domestic build at SEMA last year. Speedkore’s impeccable carbon fiber work, featured throughout the car, was one of many unique highlights that caught the attention of the judges and media alike.

From there – the car was sent to Los Angeles for multiple photo sessions and video shoots – culminating with a feature on Jay Leno’s Garage. Timing is everything. Shortly after the Leno show – the Mercury Racing powered Charger was requested for filming of the next movie in the Fast & Furious franchise. TANTRUM will be seen in the upcoming Fast and Furious film – Fast8. In US theaters April 14, 2017

The SEMA show runs Nov. 1-4.

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73 thoughts on “Mercury Racing Reveals SB4 7.0 Automotive Crate Engine”

  1. I presently run your 525 ci in my 27 Daytona do you have any plans for the boating market as a non blower motor like the 525. This could be a great reliable “run it like you stole it”motor with a XR drive package.Let me know thanks.

    1. Joe:
      The new 540 is a perfect re power candidate for the 525. Booth are very similar in total power output. The 540 far exceeds the 525 in terms of torque – as it is bored out to 8.6 Liters.

        1. Roadster Shop is the exclusive distributor for the SB4. Contact them at for pricing and availability. I must tell you the engine is restricted to 1968 or older street vehicles due to emissions standards.

  2. Congratulations gentlemen! What are the torque figures on this exciting engineering feat, or simply put . . . eighth wonder?

    1. Hi John.
      Thanks. Yes – we are excited to get the SB4 7.0 in production. The engines produces 571 Lb.Ft. @ 7500 rpm.

  3. I am the original owner of a 1990 Corvette ZR-1. Thanks for building the awesome LT5 in my car. Will your SB4 7.0 fit in my car and bolt up to the ZF 6 speed? Thank you, Tracy

    1. Hi Tracy. Thank you for your kind comments regarding the LT-5. The SB4 7.0 would fit in your ZR-1. However, due to emissions regulations, it is only certified to be used in 1976 and older road vehicles.

      1. True… I import vehicles as a side business/hobby & I like to think I know the NHTSA/DOT/EPA regs well, although there are still some issues state to state getting something registered… Ie stay away from CA!

        Technically, he can make it an “off road use only” vehicle? Like a track car?

        If it was me, I’d leave the original ZR1 alone, it’s likely a future classic! U can pick up a “standard” V8 Corvette from the same era for next to nothing! Buy a used Corvette & modify that! (IMHO)

        Mercury, NICE JOB! so I’m guessing, going by the “Tantrum”, the stock bottom end will handle turbos without an issue?

        Do u do custom builds? Ie forged pistons & H-beam con-rods for a more “bullet proof” bottom end? I also wonder what a flat-plane crank would do? There r a few companies that make a custom LS crank.

        I m not a Chevy/GM guy, but I’ve always wanted to put an LS in “something”… I’ve been wanting to put one in a Range Rover Classic (pre ’95). That said, the Ford Coyote with its twin overhead cams I’m intrigued w/ too.

        But I guess u just fixed any issues I may have have! A twin overhead cam LS!

        Too bad u don’t sell the heads separately, although I understand. I probably shouldn’t say this (you’re likely to raise the price now!), but the cost is pretty competitive when u compare it to something like an LS7, LS9 or LSA direct from GM Performance.

        So, what tranny do u recommend? Does it bolt up (without an adapter) to something like a Tremec 6-speed? The Corvette uses a transaxle, not sure what (manual) tranny is in the Camaro.

        Once again, NICE JOB! Now how about doing something with the Falconair V12 LS? or the custom CNCed “Devel V16”? (Also “Just” an LS

        1. Thanks for the kind comments. I used to own a 1970 Series II-A Land Rover 88″ Station Wagon. I would love to restore one of those or a 1990’s vintage Defender 90 with our 750 h.p. SB4. The SB4 is available as a turn-key engine through our partner Roadster Shop. The SB4 may be used in 1968 and previous model year production vehicles as well as any racing vehicle. The engine featured in Tantrum is our larger QC4 engine platform. This is a DOHC twin turbocharged – all aluminum V-8 engine. the one in Tantrum puts out 1350 h.p. We do not do custom builds. The SB4 is based off the Chevy LS cylinder block and thus it will fit up to any transmission designed for the LS as long as it is rated for the horsepower and torque. Roadster Shop will be able to answer any fitment – technical questions you may have. Good luck with your Range Rover project.

  4. This is absolutely brilliant !

    Superb engineering package – it’s about time the automotive aftermarket performance world was treated to Mercury Racing and the truth behind off-shore racing prowess.

    This package will take serious boost and live… it has Drag Week written all over it.

  5. Hi, I have ordered an Ultima Evolution kit which will be delivered in March 2017. I have not ordered the engine yet, can you please email me more info on the SB4 and what is required to have it fitted to an Ultima and if you are able to provide the additional parts for it to be a turn key installation.

    1. Hi Chris:
      We cannot provide any additional parts needed to make a turnkey Ultima installation. You will need to fabricate engine and trans mounts (the SB4 7.0 is longer than a pushrod LS due to the timing drive, so the engine sits further back). You will also need have custom headers and exhaust built, and have custom half shafts built. We used a trans axle from a Ford GT, which is overkill for the SB4 (but was appropriate for a QC4).It is also no longer available for purchase. A more typical Ultima solution may be an inverted Porsche trans axle. You would need to beef the trans axle up with aftermarket internals that you would use with an over 700 hp engine. Headers can be sourced from any competent header builder; we used GP Headers. Half shafts came from the Driveshaft Shop. The FEAD (accessory drive) will also need to be modified to delete the power steering pump.

      Hope that helps.

  6. What a great engine! Will this fit a 4th generation f-body (Firebird/Camaro)? My car is setup for road course duty so is an ARE type dry sump setup adaptable/available? Is any typical LS clutch and transmission adaptable? Sorry for all the questions but your creation is very exciting.

        1. Hello Ilario,
          The SB4 7.0, due to exhaust emissions regulations, can only be installed in 1968 or older vehicles.

          1. Thank you for your reply Rick. The car is only for off road use, so emissions are not a concern. Will the engine physically fit? I’d mainly be sceptical about room for the headers clearing the sides of th engine bag. Is the engine wider at the head exhaust ports than an LS7? Does your SB4 accept common LS headers?

          2. Ilario:

            For installation information – I will refer you to SpeedKore Performance Group – our exclusive SB4 7.0 distributor. Call 262-421-8612 and select Option 2; Engine Integration.

  7. What are the plans for doing a top-end kit for those of us with a 7.0 engine already? And what kind of pricing would it be?

    I’m building a ’90 ZR1 track car with a LS3-based Katech 427…this setup would sure look nice sitting in the engine bay of my car 😉

    1. Hi Joe. There is a possibility we may offer a LS head kit in the future. We first want to get the complete SB4 7.0 engine released and in the field.

  8. is your company or will they ever consider building an emissions approved LT-7 version of the sb4 with GM in the future for an outrageous LM version of a c8 or c9 midengine corvette?

    1. Hi Robert:
      That would be cool. We produced the DOHC LT-5 for the ZR1 Vettes back in 1990 to 1995. We would love to have the opportunity to do that again.

    1. Hi Nasser. its a Chevy LS7 cylinder block and so it will fit any transmission that will bolt up to the Chevy bell housing. The SB4 puts out a max torque of 570 ft*lbf.

    1. Brett:
      See the SB4 intake port and exhaust port flow illustration. There are 2-valve heads out there that have more peak flow than us, but we outperform them on low to mid-lift flow. Additionally, the low mass and the design of our valve train (curved contact finger follower) enable us to open the valves much faster, while maintaining durability, compared to the 2-valve head. Our combustion chamber volume is 71.2 cc.

    1. Hello Juan:
      The SB4 is intended for use on pre-1968 vintage production cars due to emissions regulation compliance. It is built to specification as a naturally aspirated engine. It was not designed nor tested for use with a supercharger or turbocharger.

  9. Question about the Idle of this engine.

    Does this engine have a Choppy Idle? Or does it have a smooth stock sounding Idle?

    If it has a choppy Idle is it possible to tune it down a little so it has smooth duration?

    1. Hello Marco.
      We want to first get the SB4 engine established in the field. We may perhaps offer the four valve heads/DOHC valve train as a kit in the future but there are no plans initially to do so.

  10. A few quetions –
    What grade Callie’s crank and Carillo rods are used in the SB4? Are they suitable for medium boost (with lo comp pistons)?

    I understand that LS dry sump systems are not compatible but can you provide info so I can get one custom made?

    Does the Mercury ECU have the facility to interact with a DCT gearbox controller? ( what buses does it support)

    1. Hi Ron;
      The SB4 crank and rods were selected to match our intended street application, and are somewhat specific to our engine design. They were specified within the constraints of high RPM, natural aspiration, and pump gas. We haven’t tested any pressure charge systems on the SB4 and thus we don’t endorse using one. Your warranty would be voided after making this sort of engine modification.

      Any fitment of an aftermarket dry sump system will likely require machining and fabrication to install. SB4’s FEAD (front end accessory drive) is further forward than a conventional LS, in order to clear the DOHC timing drive. Therefore, the typical bolt-on dry sump systems and brackets no longer match up to the crank pulley axial location, and some of the needed bosses on the block and front cover may be in use for our timing drive and covers. A dry sump specialist, such as Aviad, may be able to help you make a customized system.

      The ECU used on SB4 currently does not support external transmission controls. Our engine controller has three CAN busses, one of which has some standard SAE J1939 messaging. However, for the most part, our CAN busses are a closed system. We do not have any provision to accept torque reduction requests, or similar, from a DCT controller.


  11. Hi Rick,

    I have just bought an SB4 for my Camaro track car. On your opinion, will be the wet sump oil system coming with the engine enough for heavy track work or it will be necessary looking for a dry sump system?

    1. Hello Giovanni:
      Unfortunately, we don’t have a dry-sump system developed for the SB4. I can’t say if the current wet sump system will be enough to protect the engine in the track environment.

  12. Hi there,

    Congratulations on getting this wonderful motor out to market.

    I have a few questions about what is done architecturally to the block. Being as it is based on an OHV block, I was wondering:

    What is done with the cam tunnel, pushrod holes, and lifter bores?

    Would it be possible to use a special block that does not have the OHV provisions?

    Are there any plans to switch to a QC4V style block that resembles a typical OHC V8 block?

    Congratulations once again and thank you for your time.

    1. Thank you Sampson. The cam tunnel is filled with an idler shaft, which runs in all the stock cam bearings. Lifter bores are plugged with a special designed plug that maintains the oil gallery, but plugs the top and bottoms of the lifter bore from leaking oil.

      It would certainly be possible to use a special block, that does not have the OHV provisions. However, moving away from volume production, off the shelf parts, would substantially increase the cost to design and manufacture the engine. There are no plans to change to a bespoke cylinder block for SB4.


  13. In 1974 I ordered a Chevy 327 DOHC Moser engine that dyno’s to 566hp @ 7,000rpm. I installed this engine in a 1962 XKE. It still runs to this day.
    It would be interesting to make a deal with Leno.

  14. i would like to install your engine in my 2004 c5 track car. i am an nasa instructor and would like to use the air con. and other related items. can i have the roadster shop install the engine? Will my current long tube headers fit?

  15. And when are you going to apply this design to the big block crowd? 454 and on up?

    I’d run this on my Aluminum big “m” Dart block?

    1. Hi Gary:

      We have no plans to adapt the SB4’s DOHC valve train to larger displacement engine. We already offer a variety of QC4 (Quad Cam Four Valve) engines in the 860-1750 h.p. range for marine applications.

  16. I’m not sure if there is a language barrier issue or what. If someone asks if it fits something that isn’t a question regarding emissions. Size has nothing to do with emissions. That’s their problem, not yours. Is this running a Mefi V ECM? Is it a VVT setup? If peak torque is at 7000, what are you seeing down lower at 3000-4000 range? What is the compression ratio?

    1. Hello Michael. The SB4 features our proprietary ECM. Torque in the 3000-4000 rpm range is approximately 480 lb.ft. The compression ratio is approximately 11.7:1.

  17. Hi Rick
    I have 91 zr-1 corvette. Does your engine install in my car?
    Do you make special headers for each
    Car setup?
    I don’t use the car in USA . So no worry about emissions control.
    What about ECU management and wire harnesses?! Please let me know all info. Thank you

    1. Good questions Hadi. Roadster Shop is the exclusive distributor of the SB4. Engines are not sold with the headers as each install is unique. I would think the SB4 would fit in the 91 ZR-1. Roadster Shop would know. The SB4 comes with our proprietary ECU and engine harness.

  18. We have a 1995 MN12 Cougar 4.6 car that is our off-road racing machine. We are attempting to put supercar power levels in the car for Land Speed Racing.
    We love this engine you have created, what a beautiful design! 750HP, 750lb-ft, all-aluminum NA on pump gas, are you serious??

    If this engine can fit our race machine, it answers a lot of prayers.

    Is it possible?

    Best regards

  19. Hi Ron,
    I read your responses regarding itsallation of this engine in pre 76 cars only. Is that a U.S. wide thing or only some states? Also is there a smaller version planned such as a 6.2 liter for budget conscious applications? 3rd question will it fit in a c5 hatchback? What components of the drivetrain would need to be upgraded? Thanks for your time.

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