The Most Badass Engine You Probably Don’t Know About

if your wallet is big enough, you can have this monster under your hood!

3y ago

It is hard to imagine the world without the Chevy V8. It is unquestionably one of the greatest engines ever built. They put the engine in everything, it is the go-to engine for hot rods, and Hennesey puts one in the insanely fast Venom GT. Hell, people even put LS's into MX-5 Miatas. The formula is simple, Chevy V8's are strong, simple, parts are cheap and you can cram a ton of power into them. So trying to re-engineer one is a brave undertaking, to say the least. That didn't stop the good folks over at Mercury Marine from trying. In 2014, they launched their concept, a dual overhead cam, 4 valves per cylinder based on an LS Block. You read that correctly. Dual overhead cams, in an LS. This is insanity. There are 3 constants in the universe, death, taxes and that all LS based motors are pushrod V8's with 2 valves per cylinder. So why bother? The Quad Cam setup allows the engine to breathe significantly better, resulting in more horsepower. Eventually, That Engine Evolved into the QC4V.

These are what makes time travel possible. Actually it doesn't but when boost is applied, they do allow for huge horsepower.

These are what makes time travel possible. Actually it doesn't but when boost is applied, they do allow for huge horsepower.

So who is Mercury Marine? They happen to be one of the most well-known boat engine builders. So how in the world did they make their way into an automotive enthusiast's website? When you build a Quad Cam Chevy V8, you get my instant and undivided attention. They started with an LS7. They increased displacement to a massive 9 liters. To put it into perspective, roughly 500 cc more than the COMBINED displacement of all of Shifting Lanes' cars. They then added their special sauce, the new heads pictured above. Oh, they also added 2 turbos. Why? Because why the fuck not? Because Powwwwwerrrrrr! Because America, that's why!

They call it the QC4V (Quad Cam 4 Valves) because they build insane engines and have no brain power left over to for creativity. At full boost, It makes 1650 horsepower. 1650! Stick that in your pipe and smoke it Bugatti. That's a little over 206 horsepower per cylinder. That's 1000 MORE horsepower than the current Z06. This monster can go in anything you want: a boat, a car, an incredibly over powered but totally awesome Cuisinart. Anything. In all seriousness, is anyone else thinking Mr. Hennesy should give these guys a phone call?

And before you start thinking that it is just way too​ insane to put that engine inside a car, I give you the Tantrum. Featured on Jay Leno's garage the car looks like a Dodge Charger from 1970. However, it has enough power to actually scare the uber-gearhead that is Jay Leno. You'll see in the video below he is actually afraid to give it full power. It's nuts, it's insane and it is just about the most amount of awesome you can hope for.

Do you want the specs? Of course you do, straight from Mercury Marine themselves for your engin viewing pleasure.
BORE (MM/IN): 116/4.567
STROKE (MM/IN): 107/4.213
FUEL SYSTEM: Sequential Fuel Injection
LENGTH (MM/IN): 785/30.90 (From Back of Block to Front of Engine – Crank Pulley)
WIDTH (MM/IN): 822/32.35 (Across Timing Drive Cover)
WEIGHT (LBS/KG): 699/317

Check out the latest from ShiftingLanes on YouTube:

#MercuryMarine #Horsepower #ShiftingLanes

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Comments (45)

  • That whole article and no mention of the know the 32 valve all aluminum DOHC motor mercury marine build for the zr1 corvette from 1990-1995? The motor that was the inspiration for this motor...LAME. Amateur article with zero research.

    I have three LT5's, they are awesome motors.

      3 years ago
  • This isn't new territory for them. They did it in the 90's with the LT-5. It was a DOHC version of the LT-1 that was in Corvettes and 4th gen F-Bodies of the time. I am just shocked it too them this long to do it to an LSX.

      3 years ago
  • Its a completely custom C&C'd block, it did not start life as an LS7. You cant get 9 liters out of an LS7. Really there is nothing GM about it except its shortblock basic design structure.

      3 years ago
  • I learnt about them developing this engine whilst I was investigating Lingenfelter, who were themselves developing a flat plane crank version of the LS platform at a similar time... Yes, that's right, a flat plane crank LS based motor, not the normal bent crank design. That was some noise it made too.

      3 years ago
  • My Pontiac Fiero needs this.

      3 years ago
    • The Fiero always needed an engine that fits its design. I still like the Fiero. If GM only had cared about it...

        2 years ago