An Inside Look at the New 392/6.4L HEMI®


Our new ground pounding 392/6.4L HEMI® has been tearing up the asphalt since the beginning of the year. This torque monster comes standard in our new Challenger and Charger SRT8 models (and yes, we also share it with the 2012 Chrysler 300C and Jeep® SRT8 family members). Its mind numbing performance has rewarded its owners with 12-second ET slips at the drag strip. Want to know how we extracted 470 horsepower and 470 lb.-ft. of torque while increasing gas mileage? Check out the video from the 6.4L HEMI Technology Review Conference and hear it first hand from Gary Rogers who is the head engineer on our latest incarnation of the GEN III HEMI.



  • Franck
    Posted August 2, 2011 at 3:44 pm | Permalink

    That’s the way … aha … aha … I like it!!!! Coooooooooolllllllllllllllllllllllll!!!

    • Bob Kelly
      Posted April 23, 2016 at 8:50 am | Permalink

      Because Aluminum blocks require a cylinder sleeve that increases cost of replacement and service and Aluminum does not fair well at the higher temps that the newer motors generate.

  • srt8guy
    Posted August 2, 2011 at 4:11 pm | Permalink

    Gee, considering that the GM LS series was used as a template for the newer HEMI engines, why is Mopar still using a fricking heavy cast iron block instead of aluminum?

    Too much weight is what keeps these cars from being class-leading great instead of just good.

    • RKelly
      Posted April 23, 2016 at 8:54 am | Permalink

      Because Aluminum blocks require a cylinder sleeve that increases cost of replacement and service and Aluminum does not fair well at the higher temps that the newer motors generate.

  • Michael
    Posted August 2, 2011 at 5:20 pm | Permalink

    Aluminum is great as a weight saver but also prone to warpage…the cast block is a tried and true Hemi casting…old school blended with new school technology….

  • xoxo
    Posted August 2, 2011 at 5:46 pm | Permalink

    Too bad you can’t tune them.

  • Joe
    Posted August 2, 2011 at 6:04 pm | Permalink

    If you want an aluminum engine buy a Jap car. We build power and durability.

  • Stonecold
    Posted August 2, 2011 at 6:58 pm | Permalink

    A friend of mine bought the srt challey and ran 12.6 consistently. Can’t wait fo see what it’ll do with some engine mods

  • Tony
    Posted August 2, 2011 at 7:04 pm | Permalink

    And boat anchors..
    A new GT500 will smoke any of the cars this iron lung will go into.
    I suppose there is a similar rational for the continued use of 5-spd transmissions too..*yawn*

  • Ben
    Posted August 2, 2011 at 9:27 pm | Permalink

    I would have a stout naturally aspirated engine over those huffers they have to put on Fords to get legit power

  • Michael
    Posted August 2, 2011 at 10:56 pm | Permalink

    I saw a Mustang today then I looked away.  Low and be hold there was another and yet another ‘stang on the road.  These things must breed like fruit flies.

  • Michael
    Posted August 2, 2011 at 11:55 pm | Permalink

    @ Tony…….5 speed…funny…my SRT8 2010 challenger has a 6 speed Tremec….THE very same tranny they are putting in the Mustang, Camero, and likely the new hot rod Cadillac.     Again another blend of new technology and old school muscle…want gas mileage?….use the 5th and 6th gear on the freeways….but yet it will still roast the tires for some 1/4 mile action.

    Posted August 3, 2011 at 12:34 am | Permalink

    I don’t go on the Ford and GM blogs and badmouth their vehicles.  That is really rude.  If you are a Ford lover, the Mustang is a great vehicle.  If you like GMs then the Camaro is great.  To each his own.  The Challenger is getting a lot better and with the new supercharged one coming out next year, then that will be even better.  Yeah, its bigger and heavier than other sports cars, however, I can drive a family of four comfortably across country in style and go pretty darn fast, so who cares.  All these cars have their strengths and weaknesses.  Buy what you like and enjoy it.  By the way, nice video.

  • Franck
    Posted August 3, 2011 at 7:13 am | Permalink

    Hi Sublime!
    I think, you said right. Who lives Ford, this one can drive Ford. We Fans of Dodge lives this Vehicles and I want not an other Car like Dodge Durango. Where’s the Problem?

  • ED-209
    Posted August 3, 2011 at 1:16 pm | Permalink

    What I wouldn’t give to be able to drop one of these into my 300c… With a manual tranny no less.

  • Javier
    Posted August 3, 2011 at 1:29 pm | Permalink

    Awesome Sublime.
    I love my new Challenger. Especially since I can put my mountain bike in the trunk with the seats folded down and not have a bike hitch hanging in the rear and not to mention I can sit two adults comfortably in the back seat.

  • Gonzo
    Posted August 3, 2011 at 3:04 pm | Permalink

    I just love raw HP.. There’s no substitution for it. If $$ were no object I would add a SRT Challenger to my stable! It would look good next to my 2011 Ram 3500 Long Horn, duallie, diesel, longbed!!
    Oh & the people who come on this blog and badmouth Chrystler for anything & everything… Get a life.. Everyone has their favorite, just let people choose what they want! Not try and pick on someone for just liking a good old steel block? Next it’ll be composite blocks are best vs aluminum, Who cares??

  • Joseph Booth
    Posted August 4, 2011 at 12:38 am | Permalink

    Can the SRT8 392 fit in to a 1969 Dodge Charger with a 388 in it?

  • ED-209
    Posted August 4, 2011 at 7:53 am | Permalink

    @Joseph Booth – Anything can be *made* to fit. Just depends on how much you’re willing to pay for modification and fabrication.

  • Frank Carelli
    Posted August 4, 2011 at 8:01 am | Permalink

    Had an opportunity to open up my 2010 SRT8 Challenger on a vacant stretch of interstate recently… it BURIED the 180 MPH @ 4,000 RPM in 5th gear… the speedometer needle went down around the bottom and back up to 10 mph, 20 mph, and then 30 mph again before I GOT OFF IT! I hadn’t even gotten to 6th gear yet! Are ALL the SRT8’s that fast or is mine some kind of factory freak? I guesstimate I was doing +/- 220 mph … which would make it a 250 mph car if you stretched out 6th gear!

    At 1,100 miles… the engines not even broken in yet!

    • Doug Kreutz
      Posted September 13, 2015 at 7:57 am | Permalink

      Your factory top speed limiter is set at a 180 mph buddy. Even with a t 1000’s trinity tuner you can only raise it to 190 mph. So you must have been on something or maybe you were playing a fast and queeriest game.

    • John K
      Posted March 23, 2016 at 2:56 pm | Permalink

      ‘we build power and reliability” when did that happen? 470HP out of a massive and heavy block is horrible output. I get 570 out of my 4.4 liter motor, MUCH better build quality, better materials basically better everything. As long as we in the US accept the garbage the US auto industry is putting out for the most part we are only helping to ruin it.

      Anyhow, 470 hp (I bet like they have for decades lied about the HP/torque figures out of a big prehistoric engine block is ridiculous. Especially when it is attached to old archaic suspension with the excuse that we only want cars that go fast in a straight line. We really do need to insist that our auto industry stops ripping us off with cheap builds.

    • John K
      Posted March 23, 2016 at 3:01 pm | Permalink

      WTF are you talking about? that car has never done 180 MPH and won’t do 180 miles per hour. The forces against a vehicle are much great than that lump of junks ability to overcome those forces.

      When you post a video of this I’ll believe it but until then no way did that car do 180 with only 470 hp. I had a Porsche turbo and now a new BMW M5 and on even great roads in the US there is no way in hell I would push that car to 180 mph you’d be dead. And I don’t think the tires on that challenger will handle that speed.

  • GSTaylor
    Posted August 4, 2011 at 9:11 am | Permalink

    @Frank Carelli – That’s impossible.  Aerodynamically the Challenger cannot do 220 mph, much less 250 mph.

  • Frank
    Posted August 4, 2011 at 9:16 am | Permalink

    Just the fact that Challengers got the nod for production and sales is a huge success for all Mopar fans.  If you want a killer performing lightweight Challenger, it takes somebody’s money to get there anyway you look at it.  The best alternative for fans and Dodge alike is to pay some one else to finish a Challenger to personal specs.  Dodge has a future to protect and building specialty cars is not financially advantagous.  The risks outway the benefits unfortunately.  Its great to see that a real 2 door replica is in the dealer’s showrooms for all take home and enjoy.  That era pretty much ended in 1971.

  • Frank Carelli
    Posted August 4, 2011 at 9:43 am | Permalink

    @ GSTaylor …..

    I was IN THE CAR when the speedometer needle went completely around to 30 mph AGAIN… given the distance between 180 and ZERO… and then 30mph? What would your guess be on how fast it was going Einstein?

    As a betting man I’d venture to say it’s faster than ANYTHING you’ve got…I’ve got a couple Camaro’s, a 69 Chevelle and 4 Kawasaki’s you’d have to get past first… but even they’re nothing like the Hemi…

    Don’t insult me… I’ve done over 150 laps at Michigan Speedway courtesy of the TRACK TIME driving schools… I know what 200 mph feels like…

    The Challenger is WAY faster than the published “ratings”… that’s why I ASKED if this is some kind of factory freak.

  • Frank Carelli
    Posted August 4, 2011 at 9:51 am | Permalink

    And for the record… even at that top-end…. the Challeger handled like a go-kart! VERY unforgiving… it goes where you point it.

  • srt8guy
    Posted August 4, 2011 at 10:26 am | Permalink

    @Frank Carelli….
    Amazing, these bricks are faster than a 638hp ZR1 Corvette which will “only” do 205mph!

    Wow, that was some vivid dream, pardner!! Time to wake up now.

    If you are going to throw BS out here at least make it somewhat plausible.

  • Frank Carelli
    Posted August 4, 2011 at 11:01 am | Permalink

    @ srt8guy… if you’ve GOT ONE go stretch it out and find out for yourself… MAYBE mine IS just a freak… if you DON’T have one… don’t be an ass man!

  • GSTaylor
    Posted August 4, 2011 at 11:10 am | Permalink

    @Frank Carelli
    I haven’t ever been compared to Einstein before, and so I thank you for the compliment, even though we both know the real meaning behind that statement.

    I have no guess to the speed, as I was not in the car.  The fact that you would be brazen enough to go that fast on a public road with no regard for anyone’s personal safety would be reason enough for me to never ride with you in a vehicle.  However, that is another issue.

    As for insulting you, I did not realize that I did, as all I did was state facts.  You see, having a degree in Automotive Racing Technology allows me to understand the physics behind an automobile moving at that rate of speed, and what it requires.  Which is why cars that do travel at that rate of speed look much different then the Challenger that your or I drive, think NASCAR Nationwide Challenger here.  Which is what your second posting has indirectly accomplished, the handling of the car was trash because of the lack of downforce on the front and rear of the car and the increase of air underneath the car.  However, I really do not think you meant to say that the car handled like “a go-kart! VERY unforgiving…it goes where you point it.”  If the car went where you pointed it, the suspension underneath the car, as well as the aerodynamics, would still be acting in accord to it’s design, or, not being pushed past the design limits.  A car ill equipped to travel at that rate of speed, much like our Challengers, would see a car that was literally driving itself across the surface of the road and have a slowed response time to the input at the wheel from the driver.

    As for your collection of cars and motorcycles, good for you!  While I have never completed laps at Michigan, I do frequent Charlotte Motor Speedway to complete laps and also VIR.  If you are ever in the area I would be more then happy to arrange track time for the both of us.  

    I do look forward to your response, however this time, leave out the insults.  It doesn’t accomplish anything, much less prove how “right” you are.

  • Gonzo
    Posted August 4, 2011 at 11:22 am | Permalink

      I just found a test done on a 2011 Challenger SRT8. from Car & Driver.. They listed the 1/4 mi. runs as in the high 12’s and from 0-60 in high 4 seconds range.. Top speed is rated at 170 mph! (for the 6 speed manual).
     When you start aproaching that 200 mph mark aerodynamics play a huge roll in the cars ability to exceed that. If the cars not set up right, it’ll become airborne in a heartbeat.

  • Frank Carelli
    Posted August 4, 2011 at 3:19 pm | Permalink

    Are there any Dodge Factory reps on this blog that can explain why the car does what it does? After my little joy-ride I stopped at the dealer on the way home… I said to the salesman… “you shouldn’t be allowed to sell those cars!”… he replied “why? what’s wrong”? I asked, “you sell those cars to the general public”? He said “Yeah… a few of them”! I said “the car belongs on a race track”… he said “that’s why they have the SRT8 experience”… you have to check it out…

    For the record… I’ve been racing the better part of my 53 years…bikes, cars, dragstrip, road course, ovals…dirt and asphalt… been to Charlotte many times as I had a friend that lived there… only driven Michigan International though… and MY SRT8 handled just the same at 180 as it does at 50…

    It’s gotta be a fluke then… a factory freak… because the car is ALL THAT… to me it felt like a luxury version of the same “de-tuned” stock cars I’ve driven at Michigan… The car handles like a “go-kart”…
    regardless of speed… even a 1/32 inch movement in the steering wheel yields a response from the car

    As far as the “rated” 170 mph top end goes… my car is WAY faster than that…if all the SRT8’s are like this then  the “ratings” were lowered intentionally due to flack from the National Insurance Institute…if mine is the ONLY one that buries (by 90 degrees) the 180 MPH speedometer… then it must be a factory freak. For what it’s worth… there was absolutely no drift at that top-end… courtesy of the “Track Pac” suspension.

    Just curious… how far did that “degree in Automotive Racing Technology” take you?

  • Frank Carelli
    Posted August 4, 2011 at 3:26 pm | Permalink

    Mine is the 2010 6.1 Hemi… anyone know how many cubic inches that is??

  • GSTaylor
    Posted August 4, 2011 at 3:44 pm | Permalink

    @Frank Carelli

    The 6.1 liter Hemi is 370 cubic inches. 

    As for my degree, I have been quite successful and have had the honor of working with many individuals involved in racing, being located in North Carolina allows for many opportunities.  As I am not an employee of the companies I am involved with, but a consultant, I do not divulge any names.  At a time when race teams and companies are looking to trim budgets I am fortunate to still be able to work with several major players.

  • Frank Carelli
    Posted August 4, 2011 at 4:21 pm | Permalink

    I’m familiar with the rich racing heritage of North Carolina… I’ve visited the Hendrick Motorsports facility several times…

    But having attended six sessions of the TRACK TIME driving school at Michigan… I am familiar also with the aerodynamic effects of drag, downforce and lift on any car so it’s not like I’m a novice… had I NOT attended those schools I would NEVER have attempted to see what the Challenger’s top-end was… I assure you that I was very familiar with the road (long, straight, limited access) late at night and no public was in danger… only myself.

    Thanks for the heads-up on the 370 cubic inches… it’s “rated” at 425 HP… feels more like 475-500 to me… my 1969 Chevelle drag car (454) dyno’d at 617 HP…

    IF ANY DODGE FACTORY REPS happen upon these posts and can explain how the car does what it does…I’d be very interested!

  • kennyj
    Posted August 4, 2011 at 8:55 pm | Permalink

    Question: can anyone tell me why Dodge Durango (2011) has gone back to using a two light system rather than a perfer three light system in the back of the vehicle, the Honda Odyssey have it and 90% of others; give or take have it?

  • John
    Posted August 6, 2011 at 1:47 pm | Permalink

    When the 69 R/T Charger  is re introduced with the 426 hemi you will have my attention
    and make it a 2 door model…

  • ChuckZ
    Posted August 8, 2011 at 4:50 pm | Permalink

    If you check the Texas flying mile results, a 2008 Challenger went 180 mph without going airborne.  (ok, it had some nitrous).  Standing start, one mile of acceleration, timing lights at end.
    Another Challenger on the west coast went over 180 in the flying mile using a supercharger.

  • Frank Carelli
    Posted August 8, 2011 at 5:40 pm | Permalink

    The 2010 Challenger SRT BURIES the 180 mph speedometer

  • HEMI D
    Posted August 9, 2011 at 2:37 pm | Permalink

    @Joseph – The 5.7L, 6.1L, 6.4L HEMI engine can easily fit in an older A, B or E body vehicle. Many aftermarket companies sell motor mounts, headers, etc. for the installation. BTW, the bellhouse bolt pattern on the GEM III HEMI is the same as a Chrysler small-block (273, 318, 340, 360). Here’s a link to a company that has the components for the swap.

  • Pat A
    Posted August 10, 2011 at 2:34 pm | Permalink

    I have a 2011 challenger SRT8 i would love to run this on a race track not a drag strip ! I do know this car is very fast but my 2007 supercharged shelby gt 500 can take it out of the hole don’t know about top end . The shelby is not stock is there a track where i can run the challenger out there some where ?

  • WB
    Posted August 10, 2011 at 10:12 pm | Permalink

    @Frank Carelli . . . As your car is a manual trans, why not take the mph/1000rpm figure in 5th gear at 2000rpm and double it for the 4000rpm speed?  Sure, a little tire expansion might play into things, but you’ll still have a better idea of what your true speed might have been.  Doesn’t take advanced engineering degrees or hours/miles of racing experience to figure that out.

  • Frank Carelli
    Posted August 10, 2011 at 10:13 pm | Permalink

    Yeah the “SRT8 Experience” sponsored by Dodge… at major race tracks across the USA… google it

  • WB
    Posted August 10, 2011 at 10:38 pm | Permalink

    @Frank C . . . My calculations indicate that you might need to get an accurate GPS unit to check the calibration of your speedometer for speed and distance.  Regards, CBODY67

  • Johnathan
    Posted April 12, 2012 at 2:31 pm | Permalink

    Does anyone know, Will one of these fit in a 1970 Dodge super bee?

  • Posted May 8, 2017 at 10:17 pm | Permalink

    It sounds like we may have a tire diameter issue on the 220+mph SRT8.

Post a Comment

Your email is kept private. Required fields are marked *