First-time dynamometer runs for any production car are interesting business, at least for those with "car nerd" in their resumes. And the virgin public dyno testing of a new supercar like the SRT Viper GTS, well, that's just a bit o' heaven right there. So, when we heard that the number crunchers at Edmunds had gotten the new Viper into the test facility, we were hooked right away.

We won't spoil the video for you by blowing the ending right here, but suffice it to say that the SRT 8.4-liter V10, rated at 640 horsepower and 600 pound-feet of torque at the crank, is still pretty super by the time the power makes its way to those wide rear tires. Follow on below for the fun.



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    • 1 Second Ago
  • 54 Comments
      Mr E
      • 2 Years Ago
      i'll take it! this is a giveaway thread, right?
      SCOTTM
      • 2 Years Ago
      Does anybody know what the ZR1 made on this dyno? It seems to me it put down around 570.
      BombSquad
      • 2 Years Ago
      That's 20 rwhp and 30 rwtq lower than the 4th gen they tested (the '09 made 580 rwhp 560 rwtq). Ralph Gilles' twitter has been full of insider info for the car that most places aren't reporting. For one, they should have dyno'd hood down, it wasn't getting cold air to the intake due to the new reverse opening hood. These pre-production cars do not yet have the Sabelt seats, just a space filler until the production units arrived. There are also some interesting points he made about the supposedly stock ZR-1's that GM sent out in the press fleet for these head to head tests. Dynoing 20-30 rwhp high and wearing shaved MPSC rubber. I have a lot of respect for Ralph even if I'm not a big Viper fan, I think this whole launch has been troubling for him.
        audisp0rta4
        • 2 Years Ago
        @BombSquad
        I do too. I think Ralph (and team) have a singular, competitive focus that seems to be missing from most mainstream manufacturers today. Whether the ZR1 was enhanced or not...his anger at the results ensures that he will not be resting on his laurels. Hopefully the Corvette team stays on their toes. It's going to be fiercer than ever, and I'm excited to see 2 American cars that I love battle it out!!
        Mike
        • 2 Years Ago
        @BombSquad
        Edmund's numbers have always been on the high side. Maybe they finally used a more accurate dyno.
      snap_understeer_ftw
      • 2 Years Ago
      wow...that' a pretty sweet feature with the snake appearing in the gauges as you near redline Well played SRT...very well played
        recharged95
        • 2 Years Ago
        @snap_understeer_ftw
        Future news: 2013 SRT vipers appear to have a high rate of crashes or engine blow ups. Research finds it's due to the owners staring at the tach vs the road. Sweet tach animation. Should have made it a HUD type mechanism.
        SloopJohnB
        • 2 Years Ago
        @snap_understeer_ftw
        That's because it will bite you in the arse....
      protovici
      • 2 Years Ago
      Fact check for the non-informed. 1.) "Boat-Anchor" this car matches the likes of the Veyron, F12, and the Aventador at a much cheaper price. 2.) Putting a V8 inside a Viper is like putting an inline-4 in a Mustang or Camaro. 3.) Most powerful naturally feed engine on the market.... nuf said.
        • 2 Years Ago
        @protovici
        [blocked]
      wooootles
      • 2 Years Ago
      Cool tach
      Rr778
      • 2 Years Ago
      Pre production ? Not relevant.
        keet
        • 2 Years Ago
        @Rr778
        sorta like your opinion...! ;)
        GreaseMonkeySRT
        • 2 Years Ago
        @Rr778
        Yes it is. Prototype exhausts, intakes, and driveline parts can affect RWHP. Sometimes parts are just tossed on to get a driveable car that haven't been tuned or even had the full design finished. Granted it won't be much, but it is relevant.
          recharged95
          • 2 Years Ago
          @GreaseMonkeySRT
          it's very relevant. it can show what the aftermarket can do right off the dealer lot. For all I know it could be an air filter change.
      onewayroll
      • 2 Years Ago
      That tach at redline is F-ing sweet!
      Jonathan Wayne
      • 2 Years Ago
      Good Lord I love this car. I could care less about its so called faults and issues. Few things on the road have the presence of a Viper.
      Chris
      • 2 Years Ago
      As much as I LOVE the SRT Viper in all its glory, I can't help but notice two obvious negatives: 1) The Viper is a sexy beast in Stryker Red and black, but in yellow, it looks like a childish cartoon car. I don't know, for some reason, the curves and details seem to fade away. The only thing left to see seems to be cartoonish-looking air inlets with very "rounded" edges. Someone needs to change the gloss or hue on this yellow paint, because the problem is NOT the sheetmetal. 2) For a naturally aspired, 8.4 Liter V10 beast, the exhaust note is loud, yet utterly disappointing. Where's the loud burbles and sharp crackles? An exhaust note should make the room vibrate, not just be loud. Even the puny Fiat 500's exhaust note is surprisingly raspy (not to mention the Abarth) and they have the tiny MultiAir to deal with. SRT needs to inject the exhaust system with more oomph.
        NissanGTR
        • 2 Years Ago
        @Chris
        Yea a Fiat Abarth 500 has a really masculine exhaust note. I mean you wouldnt think it was a 4cylinder T.
        john
        • 2 Years Ago
        @Chris
        Yep, yellow doesn't do this car many favors.
        waetherman
        • 2 Years Ago
        @Chris
        I'm totally against tuning for sound - it's an absurd practice. Who cares what a car sounds like if it's not related to its performance? All those burbles and crackles you're looking for would just be an indication of inefficient combustion anyway. Give me a car that can go 0-60 in three seconds and I wouldn't care if it sounded like a weed whacker.
        omgcool
        • 2 Years Ago
        @Chris
        I agree with you completely on the Yellow point.. Yellow definitely doesn't do the car justice. This design needs darker, less-vibrant colors. I have to reserve judgement on the sound, though. I've heard some recordings that do sound really good for a V10 (watch for more sound videos). In an interview (Autoline Afterhours), Ralph talked about how he never liked the sound of the V10, and that making one sound good poses tremendous challenges to the engineering teams. I think they've made an improvement over the previous Viper, but a V10 will simply never sound as mean as a good ol' American or German V8.
      Brian Rautio
      • 2 Years Ago
      I want this car so bad.
      Peter_G
      • 2 Years Ago
      The caliper is at 7-9 o'clock. What is that that at 4-5 o'clock? And those have got to be the coolest gauges I've ever seen. Bravo Dod....SRT. Bravo.
        snap_understeer_ftw
        • 2 Years Ago
        @Peter_G
        e-brake-only calipers it's how e-brake is done on cars with fixed rear calipers usually.
        Jason
        • 2 Years Ago
        @Peter_G
        My guess is parking brake as not so easily incorporated into multi-piston racing calipers like those.
        Drakkon
        • 2 Years Ago
        @Peter_G
        The parking brake caliper. Some companies think this is simpler and weighs less than having a drum-style brake shoe like most cars have.
        BahamaTodd
        • 2 Years Ago
        @Peter_G
        +1 I also want to know what that other part is on the rear rotors.
          Brian Rautio
          • 2 Years Ago
          @BahamaTodd
          On a single piston caliper as on most cars, the caliper itself usually compresses, so the e-brake can just use a mechanical linkage on the same caliper. On multi-piston calipers, the caliper is usually one, fixed, solid chunk of aluminum with pistons on both sides. Since you can't use a linkage to compress the pistons, they instead have to rely on a separate caliper solely for the e-brake. Most cars don't have this as multi-piston calipers in the rear as it adds cost. Moreover, the rear brakes don't really matter as much in the nose-heavy, lightly sprung cars most of us drive as they do in balanced, stiffly sprung sports cars.
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