2012 Chevrolet Camaro engine weight savings – Click above to watch the video after the jump

2012 camaro engine The 2012 Chevrolet Camaro will feature 323 horsepower, or 11 more ponies than the 2011 model. But General Motors engineers didn't accomplish this feat by adding direct injection or variable valve timing. In fact, the 2011 version of the 3.6-liter V6 already incorporated those high-tech engine components.

Instead, engineers were able to add extra power by allowing the high-tech mill to breathe better. To do this, intake airflow was improved by seven percent through extensive simulation and bench testing. As a result, power is up by 11 horsepower, while exhaust flow is improved by 10 percent.

Engineers also manged to remove an incredible 13 pounds from the 3.6-liter by integrating the exhaust manifolds into the aluminum cylinder head. This change meant that a pair of old-school iron manifolds, 12 bolts, a pair of gasket and heat shields with six more bolts were eliminated.

Beyond weight savings, these changes also eliminate the potential for gasket failure while fuel efficiency is improved. The 2012 Camaro 2LS model will now boast 30 miles per gallon on the highway, up from an also respectable 29 mpg from the 2011 model.

Hit the jump to watch a short video, which shows exactly how GM was able to shave 13 pounds off of an already reasonably light engine. Then you can stay to read over The General's press release.



Show full PR text
In auto production, more power, better fuel economy and fewer emissions rarely appear together. But the 2012 Camaro 3.6L direct injection V6 engine achieves all three by combining the exhaust manifold with the cylinder head into a single aluminum casting.

Each integrated exhaust manifold cylinder head – a V6 has two -- replaces a cast iron exhaust manifold, six bolts, a gasket and a heat shield and three bolts. By eliminating this joint, the potential for a gasket failure is eliminated. And the change reduces engine weight by 13 lbs. or 6 kg per engine. Reducing mass helps improve fuel economy and the 2012 Camaro 2LS model is EPA estimated at 30 mpg highway.

"Reducing engine mass of this magnitude doesn't happen often," said Ameer Haider, GM assistant chief engineer for V6 engines. "Engineering usually looks for reduction in terms of grams not pounds. It's just like removing a set of golf clubs from your car when you don't need them – ultimately it saves fuel. When combined with other mass reductions, the customer will see better fuel economy over time with better performance."

Extensive simulation and bench testing was performed to perfect cylinder-head airflow. Intake airflow is improved 7 percent with the use of larger intake valves (38.3 mm v. 36.9 mm), which are primarily responsible for an increase of 11 horsepower. Exhaust flow is 10 percent better than the previous V6.

Lower emissions, narrower engine size and noise reduction round out the list of benefits for the new head design. With the catalytic converter closer to the engine exhaust point, the emissions reduction process begins sooner, resulting in lower emissions. The new cylinder heads decrease the overall width of the engine by 4.6 inches (117 mm) for significantly more packaging space in the engine bay making underhood work easier. Due to less surface area, the new design contributes to a 1 decibel reduction in engine noise at idle.

"The new, patented design benefits the customer in all the key areas without any tradeoffs, said Haider. "Emissions, performance, fuel economy, and noise all improve with the integrated exhaust manifold."


I'm reporting this comment as:

Reported comments and users are reviewed by Autoblog staff 24 hours a day, seven days a week to determine whether they violate Community Guideline. Accounts are penalized for Community Guidelines violations and serious or repeated violations can lead to account termination.


    • 1 Second Ago
  • 61 Comments
      BimmerFerret
      • 4 Years Ago
      I love competition. 323hp out of a v6? Wow
        SupraTRD
        • 4 Years Ago
        @BimmerFerret
        Nissan's V6 makes 330hp. I don't find this VERY amazing, but at least it still gets 30mpg.
      Hazdaz
      • 4 Years Ago
      Nice. These are the type of efficiencies that I appreciate. Not dicking around with EPA ratings and gaming the system... but actual real engineering that nets some rather impressive results from seemingly a minimal investment of time and money on GM's part. Good job.
      longducdong
      • 4 Years Ago
      Very cool. But I guess youre kinda screwed when it comes to adding some aftermarket headers, no?
        • 4 Years Ago
        @longducdong
        [blocked]
        • 4 Years Ago
        @longducdong
        [blocked]
        2 Wheeled Menace
        • 4 Years Ago
        @longducdong
        Yep. More like aftermarket downpipe, which i don't think is going to do much for you. IMHO the era of tuning gas engines is kinda coming to an end.
          Hazdaz
          • 4 Years Ago
          @2 Wheeled Menace
          "the era of tuning gas engines is kinda coming to an end." Couldn't disagree more. If anything, I guess even MORE, and easier, tuning possible in the future. With the ECU controlling almost everything in the engine, and technologies like DI offering up more precise control of the things you need to make power - namely fuel and air, I think we'll eventually see afternarket tunes that change just a couple of lines of code and net you some big power gains... then the opposite. A few lines of different code could potentially turn your modded-out car into a much more fuel efficient one (by possibly cutting the power during your commute, for instance). The more control you have over the things going on in the engine, the more power creative engineers will be able to squeeze out.
          Rotation
          • 4 Years Ago
          @2 Wheeled Menace
          You can still put in a cam or pistons and that's where the real power always was on a normally aspirated engine anyway.
        Mayoman
        • 4 Years Ago
        @longducdong
        All you have to do is bold a couple of turbochargers right onto the head.
        perpetual.torment
        • 4 Years Ago
        @longducdong
        Would you really be adding headers to the V6? Wouldn't that be more the territory of the SS or ZL1? Now, if you wanted to add a turbo or two, I could see this (integrated exhaust manifold) being a positive in both space and heat.
        Autoblogist
        • 4 Years Ago
        @longducdong
        Yeah, and a port & polish job would most likely mean removal of the engine, hardly worth it unless you had some serious power adders and lots of cash.
      Joe Ransom
      • 4 Years Ago
      looks like a great place to mount up some turbos to me
      SheldonRoss
      • 4 Years Ago
      This will limit the potential for cheap bolt on upgrades. Yes, people will try and make their V6s more powerful, that's not just the domain of V8s. It's also a cost saving move, as their is less assembly on their part and fewer castings. If they were truly interested in performance, tubular headers would reduce weight and increase power. Of course they would also be more expensive.
        axiomatik
        • 4 Years Ago
        @SheldonRoss
        tubular headers are also much more likely to crack than cast manifolds. I doubt you'll see tubular headers on a standard production car for reliability issues.
          SheldonRoss
          • 4 Years Ago
          @axiomatik
          The C6 Z06 Corvettes have factory headers... apparently they're not worried about them cracking.
          KaiserWilhelm
          • 4 Years Ago
          @axiomatik
          The 5.0 Mustang GT uses tubular headers from the factory.
        tritonstrategies
        • 4 Years Ago
        @SheldonRoss
        Looks like GM has already improved exhaust flow, so a supposed set of headers probably wouldn't yield any better results anyway.
      Redline
      • 4 Years Ago
      Well done guys, glad to see some nice 6 cylinder power levels. Keep on keepin on.
      Enorym
      • 4 Years Ago
      I kinda think that port has something more to its design. http://www.volvospeed.com/Pics/Review/innovative_turbo.jpg Same shape eh? Yeah thats what I thought. Turbo 6 camaro here we go!
      _M7_
      • 4 Years Ago
      sorry but...high tech ???? jajajajajaja COME ON a 20 years old Sentra SE-R have aluminum cilinder head + it even have DOHC variable valve timing intake by oil presure...plus the latest SR20VE20V have 200 hp from stock....so again sorry XD but its nice to see some improves on american engines
        • 4 Years Ago
        @_M7_
        [blocked]
        KaiserWilhelm
        • 4 Years Ago
        @_M7_
        It has direct injection, a wonderful technology that has so far been shunned by almost all Japanese manufacturers so fa, along with variable valve timing. So who's high tech now?
          DB
          • 4 Years Ago
          @KaiserWilhelm
          KaiserWilhelm: By "almost all Japanese manufacturers" I presume you are excluding Mitsubish, Nissan, and Toyota, given the fact that they were the companies that pioneered gasoline direct injection's use on production cars and are still some of the most aggressive users of the technology. I also hope you are not implying that the Japanese shunned Variable Valve Timing, because that would just be silly. I do hope that US cars will get Variable Valve Lift/Valve Throttling soon. Hopefuly Fiat will fix this.
      • 4 Years Ago
      [blocked]
      Nathan
      • 4 Years Ago
      323 horsepower out of a 3.6L V6 is amazing.
        KaiserWilhelm
        • 4 Years Ago
        @Nathan
        Nissan makes 337 out of their 3.7L VQ engines, without direct injection. Although those motors supposedly have terrible NVH issues. ...and don't forget about Porsche with their smooth running flat-6's making 345-500hp all motor :D
          ddaw735
          • 4 Years Ago
          @KaiserWilhelm
          That Nissan engine weighs more than a ls3 and, the Porsche's cost how much?
          Corey Allen
          • 4 Years Ago
          @KaiserWilhelm
          My daily driver has a vq37vhr and even with spirted city driving i get better then 11km/L. It only has NVH issues above 7000rpm but i mean who's rev'ing it to that on the street all that often? Nissan has had DI gas motors for 15 years but hasn't offered it on they're NA offerings yet. I imagine you'll see the vk/vq/vr motors all offer it and have a nice power / fuel decrease.
          Rotation
          • 4 Years Ago
          @KaiserWilhelm
          The Nissan is making 91HP/l (337 out of 3.7L) on premium gas. This is making 90HP/l (323 out of 3.6L) on regular gas. The latter is more impressive than the former. Although as you point out, Nissan will likely increase their power when they get DI. The NVH isn't that bad on the big VQs. It's a tad rougher than the GM 3.6L (going by my CTS engine), but it's not too bad.
      Hector Djibaou
      • 4 Years Ago
      Pretty impressive gains with the power, the weight uhhh..not so much. 13 lbs off is not really noticeable in a 3,700+ pound car, just saying! Because: 2k11 mustang v6: below 3500 lb with 305hp at 3.7L (could be better). 2k12 genesis v6: also below 3500lb with 333HP - the .2liter difference explains (i guess) this 10+hp figure over the camero. Although I am not a fan of American muscle, if Chevy is going for MPG I can understand the weight issue, but when you buy a car such as the Camero, are you really looking at MPG? If you are I dunno maybe you need to rethink that strategy. F.Y.I - I drive a 2010 wrx, and did consider Camero/Genesis/A4 before purchasing the Suby, and I've owned 2+ (the + is because I bought it and got rid of it within a year) american cars; but then again that's not what this post should be about.
        Brokenarrow
        • 4 Years Ago
        @Hector Djibaou
        Well at the end of the day it is 11 more horsepower to make up for the weight and the extra mpg is a bit of icing on the cake. The weight off is just part of what they did to make the engine better, I'm sure the v6 has more applications than just "Camaro engine". As for people actually getting that mpg figure, well people like to cruise in muscle cars. Yea half the fun is stepping on having the torque rip your face off, but a lot of people just like to cruise. On the highway, if you aren't speeding, or even if you aren't speeding too much given how powerful this engine is, it's possible to see the mpg figures.
        Imaginary lines
        • 4 Years Ago
        @Hector Djibaou
        Ya I mean why should a CamAro V6 get 18/29 all while your 4cyl gets 18/25 hell a 412hp 5.0 V8 Mustang gets 18/25 (automatic) so 147 hp more and no gas penalty I don't think America needs to think when our V8's are getting what a 4 cyl can do.....just saying.....
          Hector Djibaou
          • 4 Years Ago
          @Imaginary lines
          Gotta agree with a lot "graphikzking" said. I especially like the Cylinder de-activation thing, doesn't the 300C use that as well? In response to "imaginery lines" - the cars you mentioned are all RWD right? If you were to take a 4cyl AWD car and turn it into RWD, in most scenarios you would pick up MPGs. It's a lot different trying to turn 4 wheels vs. 2, lol. Notice how Audi for example is able to get 20 city and 29-30 highway on most of their cars? Yeah it's cause they are pretty underpowered, and they are pretty heavy (i.e. over 3500 lbs in most cases). But the aim of audi isn't really for you to smash your foot down when you can, that would defeat the purpose of giving you 210 HP (i think it's gone up a lot now). If you cant understand what I'm trying to say, look up (http://www.autoblog.com/2011/04/20/2012-subaru-impreza/#continued). I'm not a die hard fan of subaru, but just read the part about them trying to improve MPGs on an AWD car.
          graphikzking
          • 4 Years Ago
          @Imaginary lines
          You don't buy a Suburu because of the gas mileage. You buy it because of the beautiful sound (in my opinion) a horizontally opposed engine makes. You buy it because of the fun autocrossing / awd etc. Try driving a Mustang in a PA winter when there is an inch of snow on the ground! The Mustang is also a 2 door coupe. Look at the Corvette. Gets decent mileage in that car. Put it into a G8 and it gets crappy mileage. I like that Chevy is lopping off 13 lbs, adding HP, and gaining gas mileage in their cars. I hope that they continue down that path! If they do that 3 years in a row they will have a hellll of an engine. *It's already competitive). Cylinder deactivation to 4cyl while cruising on the highway and underbody spoiler to direct airflow may even get it up to 34mpg. I'm just curious why it took them time to change the engine to do this? They develop an entirely new engine, it costs hundreds of millions of dollars to make then they change it within a few years? Why wasn't it done at the beginning?
        Hazdaz
        • 4 Years Ago
        @Hector Djibaou
        Please sell your WRX because you are a disgrace to those of us Scooby owners that know better. Both the current Mustang and CamAro are great cars with very up-to-date technology behind them (well, except for the SRA in the 'Stang, but that's going away eventually). GM tweaking their V6 to get 11 more HP AND at the same time dropping a couple of pounds is commendable and shows that they are finally serious about staying up to date with technology. Oh yeah, and for the love of god, there is no damn E in CamAro.
          Hector Djibaou
          • 4 Years Ago
          @Hazdaz
          My mistake on the spelling, didn't really care too much. But I DID NOT BUY THE WRX FOR GAS MILEAGE!! I have my reasons for getting that car, mainly AWD and the fact that there are quite a lot of things I can do on my car (agility wise) that those cars can't. I'm sorry but ever tried driving in a snow storm on the lane that hasn't been plowed? Yeah quite difficult with RWD! I live in MD, it snows up here from time to time. I would like to have a car to drive year round, and oh by the there is a company that goes by the name of COBB tuning that offers ECU tuning for about $600. With that there is a map called the ECONOMY map, so while gas price are sucky right now, I can still get 27MPG (which I can prove with a pic!) from my AWD suby and if I wanted power simply switch back the ECU map to my more powerful one. For a sub 30K car, I would think that is pretty impressive. But then again I am a disgrace to suby owners, lol! I'm not saying GM has crap cars, and the great 30MPG/hwy please tell me what Camaro driver will actually get that driving a car with that kind of power. My point to this post was the fact that if GM if still trying to aim for the Mustang and Genesis, loosing the weight and adding 11 HP isn't really going to impress a lot of people who are going to factor in weight-to-power ratio. I'm sorry but just based on the data, and I honestly like the way the Genesis looks over the Camaro (just my preference) I would buy the Genesis over that. If it were up to the stang, that would be a serious toss up because damn, there are a lot of people with that same car. It's nice to have something different! I can tell you are a fan of the Camaro, most Americans are. But I don't buy a car based off looks first, when I go shopping for a car I factor everything mother*****ng thing (weight/power/AWD-RWD-FWD, the driving conditions I'll be in) you name it everything. Yes the WRX isn't a looker, but I'm sorry please name one other car below 30K that can deliver 0-60 in sub 5 seconds stock that you can drive year round without too much problem. And I know just about every downfall that car has, and the fact that a 2002 WRX damn near almost 10 years later still has a value of $9K when the car has barely sold for 26K (if I'm not mistaken new back in 02). SO MAYBE I'M MISSING SOMETHING WHEN YOU SAY THAT I AM A DISGRACE TO SCOOBY OWNERS, but I think I have covered a lot. lol, I'm not trying to call you out or anything, just stating facts.
          diablo000
          • 4 Years Ago
          @Hazdaz
          @ Hector Quit your bullshit. I own a G8 GT. I drive it year round. I live in CT. First year I drove on the crappy stock Goodyear Eagle RSA tires. They're pretty well known to have next to no traction in the rain, in the snow, and even on dry dirty pavement. I never once got stuck (but I did fishtail often). The next year I bought a dedicated set of winter/snow rims/tires. Now the car has more traction than I know what to do with. I'm able to pass any vehicle with all season tires on no matter what wheels are driven on the vehicle with ease. This means that I've driven by SUVs, other RWD cars such as BMWs, Mercedes, and yes, even your vaunted Subarus that are in the ditch. Driven wheels have less to do with being able to drive in inclement weather than you think.
        bobmarley
        • 4 Years Ago
        @Hector Djibaou
        I think anyone buying almost any car now days is thinking about MPG's...Unless you are well off. There are a lot of people that have these cars as daily drivers but stretch their budget to buy them for the love of cars so gas prices and MPG's are big factors for people with tight budgets
      Master Austin
      • 4 Years Ago
      Good news, that cow needs as much as possible to make up for the heaviness.
    • Load More Comments