• Sep 24th 2008 at 3:29PM
  • 21
It always happens this way. Shortly after a new performance car is released to the public, it will find its way to a dyno shortly thereafter. When that new vehicle is the new performance king of the automotive world, aka the 2009 Corvette ZR1, our collective interest is piqued. So, how does it fare on the rollers? Two separate 'Vettes were tested, and the average output was about 535 horsepower at the rear wheels. After factoring in the normal 15-percent drivetrain losses for a rear-wheel drive car, that's pretty darn close to the claimed 638. After a bit of tinkering the team got that number up near 570, saying it's running a bit rich from the factory. Click here for the full graph.

Until the V-Spec GT-R is unveiled the ZR1's most natural competitor might be the normal Nissan GT-R; despite the pricing disparity between the two, they are the two most amazing performance bargains currently on the market. For what it's worth, the GT-R seems to be averaging about 420 horsepower at the wheels. Apples to oranges? Sure, but it's always fun to throw a little more fuel on the fire. If we didn't do it, you know it would come up in the comments. And so it will, have fun.

[Source: Corvette Blogger]

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    • 1 Second Ago
      • 6 Years Ago
      Natural competitor is the GT-R?!? What the heck happened to the Viper?
      • 6 Years Ago
      535 rwhp? You can get a base Vette (LS3) to 500 rwhp with basic bolt ons and a cam for $5000 (see following links).

      **Another 500 rwhp LG LS3**
      Cartek 4X LS3 cam only makes 510 RWHP 452 RWTQ
      Cartek Cam LS3 + Bolt Ons Hits 509 RWHP.
      • 6 Years Ago
      Blah Blah Blah. Supercharged and only getting 100 hp per liter? Not impressive. The engineering on the car is not impressive. Every part of the GT-R was designed to go fast. the ZR1 is just another rear drive car with Giant tires and a supercharger on a mondo v8. it's a mad max cartoon car, and it doesn't look good either. they'll be giving them away in 12 months.....
      • 6 Years Ago
      that dyno number dissapoints me...my stock Z06 made 470hp STOCK, so I'd think a ZR1 should make close to 570hp at the wheels WITHOUT the tinkering. However, I drove a ZR1 at VIR while instructing for the National Corvette Museum, and it makes more power than anybody needs!
        • 6 Years Ago
        Where did that other reply go? Whether David is full of it or not on the 470 number I have no clue. But I'm pretty sure he isn't 12 years old.

        • 6 Years Ago
        you are so full of it.. NO stock Z06 would dyno at 470. one of the dumbest lies ever told online.. seriously.

        the Z06 puts out about 450 hp at the rear wheel.. FACT. Every Z06 MT has dynoed has come in around 450, with about a 10% loss.. and nothing less than 10% has ever been recorded on a dyno for the Z06.

        you're full of it .. and you're probably 12.
        • 6 Years Ago
        It would also depend on the type of dyno. The numbers would make sense if they used a Mustang dyno, which tends to grossly under-rate cars.

        If the 535hp is on a Dynojet, I'm a bit disappointed as well. That's about where an LS7 dyno with LT headers, exhaust, intake, and a couple other simple mods.
      • 6 Years Ago
      Exactly what it says, The ACR with the Hardcore package is not really as close to being a complete road car as the GT-R and the ZR1.
      • 6 Years Ago
      You have to remember that the SAE standards that GM rates the horsepower by are not duplicated in such a dyno test.

      But man is that a lot of horsepower no matter how you look at it.
        • 6 Years Ago
        You got that right. Anything over 500 at the wheels is a helluva lot.
      • 6 Years Ago
      What people are either forgetting or not aware of is the fact that dyno numbers are not absolute. That is, you can't just compare the dyno numbers from one car to those of another car at a different time, place, and dyno. It's extremely unlikely, for instance, that the Viper SRT-10 that was linked was run on the same type of dyno with the same specifications as the ZR-1. This alone makes comparing numbers relatively worthless.

      Even comparing a car run on a Mustang dyno in FL in June to the same car run on a different Mustang dyno in Buffalo in March might not be very meaningful.

      All you need to know is that all these cars are laying down huge numbers. The only way a dyno can be comparable is if the exact same dyno is used for all these cars in succession.
      • 6 Years Ago
      • 6 Years Ago
      USA! USA! USA!

      j/k, but seriously, that is a kick ass 'vette. The Ford GT still holds my heart for top American supercar, but the ZR1 is laying smokey burnouts just outside the garage in my head.
        • 6 Years Ago
        I totally agree about the Ford GT. It's my favorite American supercar, as well. Nothing against the ZR1 or ACR.
      • 6 Years Ago
      Every part of the GT-R was designed to go fast? and yet this car is faster. You may not be impressed but the simple fact of the matter is that this unimpressive car makes your dream car look like a run of the mill import trying to set foot in the american V8 field of play and quickly being reminded it can't compete.
      V8s are simply better, show me a V6 or a four banger that can run 3s@>300mph and I might reconsider.

      and as to making a Z06 push these numbers with $5000 worth of after market... dont be a ricer. you can take this car and put the same $5000 worth of mods on it and make way more than the Z06. Quit trying to compare a stock vehicle to a modified one, it doesn't work.
      • 6 Years Ago
      Basically this tells us the car is putting out right around what it's rated at. Which makes sense, as GM's numbers are SAE certified now, so they can't really fudge them.
      • 6 Years Ago
      Not all dyno's are equal. Some dyno's read high, some read low. The only true way to read a car's horsepower is to pull the motor, otherwise these are just comparative estimates. ~6.5% increase in RWHP means you're about 6.5% faster, thats it.
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