Corvette Stingray hits the dyno for the first time

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Thread: Corvette Stingray hits the dyno for the first time

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    Corvette Stingray hits the dyno for the first time

    http://www.leftlanenews.com/the-corv...rst-time.html#

    By Nick Jaynes

    The direct injected LT1 V8 under the hood of the all-new C7 Corvette Stingray is rated at 460 horsepower and 465 pound-feet of torque at the flywheel. That is, with the optional performance exhaust, which unleashes and extra 5 hp and 5 lb-ft of torque. These numbers, while all well and good, mean little as flywheel horsepower numbers can sometimes vastly outweigh the power actually getting to the wheels.

    The weight for true pavement-hitting horsepower numbers is finally over, as Edmunds has strapped the Stingray to a dyno in the first independent test of its kind. Here are the results.

    First, let’s look at torque – of which the LT1 has plenty. From 2,000 to 6,000 RPM the Stingray’s 6.2-liter V8 produces no less than 350 pound-feet of torque, as we can see in the graphs in the gallery above. Topping out around 5,000 RPM, the torque hits 411 pound-feet at the rear wheels.

    On the horsepower front, the story is a bit less linear. Horsepower climbs quickly between 2,000 and 6,000 RPM topping out at 411 horses - just around 1,000 RPMs after peak torque.

    Edmunds also compares the Stingray to the Camaro and Ford GT500 dyno tests in the graphs above. As you can see, the Ford does a sight better than the ‘Ray. Rightfully, Edmunds is quick to point out that comparing the two isn’t really fair. They are, after all, very different beasts.

    Dyno Graphs and more at the link....
    corvette-stingray-dyno-3_653.jpg

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    Re: Corvette Stingray hits the dyno for the first time

    Edmunds also compares the Stingray to the Camaro and Ford GT500 dyno tests in the graphs above. As you can see, the Ford does a sight better than the ‘Ray. Rightfully, Edmunds is quick to point out that comparing the two isn’t really fair. They are, after all, very different beasts.
    Granted they are different beasts but around 200 more hp and fT/lbs of torque is a little more than sight better

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    Re: Corvette Stingray hits the dyno for the first time

    So the LT1 is a little bit underrated?

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    Re: Corvette Stingray hits the dyno for the first time

    Stingray compared to the LS3 powered Camaro SS from the same article:

    http://cdn4.leftlanenews.com/photos/...dyno-2_653.jpg

    ^This gives us a better idea of the improvements between Gen 4 to 5.

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    Re: Corvette Stingray hits the dyno for the first time

    Edmunds had their story and vid up also:
    http://www.edmunds.com/car-reviews/t...dyno-test.html


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    Re: Corvette Stingray hits the dyno for the first time

    Quote Originally Posted by LetsRace View Post
    So the LT1 is a little bit underrated?
    How do you see that? It appears to be less than the rated at the wheels

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    Re: Corvette Stingray hits the dyno for the first time

    Quote Originally Posted by andretti View Post
    How do you see that? It appears to be less than the rated at the wheels
    What he means is that either they underrated the horsepower/torque ratings (though unlikely due to SAE rating standard) or that the drivetrain loss is an impressive 10.7% from flywheel to rear wheels (460hp rated-411 dyno=49hp. 49hp/rated 460hp: 10.7% loss).
    Last edited by wtgkb8; 08-25-2013 at 10:43 PM.

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    Re: Corvette Stingray hits the dyno for the first time

    Quote Originally Posted by andretti View Post
    How do you see that? It appears to be less than the rated at the wheels
    Horsepower rating for vehicles are done at the engine flywheel, not the net power output at the wheels. Typical driveline loss is about 17-25% if I remember correctly.

    The only time where power ratings get weird is with hybrids when the combined power of the engine and motor give the output figures.

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    Re: Corvette Stingray hits the dyno for the first time

    My c5 z06 which weighed in at 3100 lbs with cam, heads and 3.73 gears was dam fast. If I remember correctly it had 415 rwhp..

    I'm sure the factory 411 rwhp is even better with its massive bottom end torque.
    Last edited by JBsZ06; 08-26-2013 at 01:05 PM.

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    Re: Corvette Stingray hits the dyno for the first time

    Quote Originally Posted by SX3 View Post
    Horsepower rating for vehicles are done at the engine flywheel, not the net power output at the wheels. Typical driveline loss is about 17-25% if I remember correctly.

    The only time where power ratings get weird is with hybrids when the combined power of the engine and motor give the output figures.
    The dyno appears to be a "DynoJet" dynamometer and the typical losses on most of the GM 6spd cars was around 12% if I remember correctly. Auto trans cars were in the 20-25% loss category.

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    Re: Corvette Stingray hits the dyno for the first time

    I completely failed to see the relevance of comparing the blown GT500 V8. I thought that was poor journalism, like some Ford guy snuck that in to belittle the results of the dyno. Ford's 5.0L or Chrysler's 6.4L would make more sense. Even the Boss 302 only reaches its lofty horsepower with a racing tune that sacrifices fuel economy, while the LT1 makes a great deal more torque and class leading FE.

    Back to the dyno, the LT1 is either putting out roughly 480 hp/ 480 lb-ft at the crank (accounting for 15% loss) or the drivetrain only loses 11% from crank to wheels, which is crazy good either way you look at it.
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    Re: Corvette Stingray hits the dyno for the first time

    15 percent drivetrain loss on a Dyno with a manual.....closer to 20 percent with an auto
    Last edited by JBsZ06; 08-27-2013 at 05:32 AM.

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    Re: Corvette Stingray hits the dyno for the first time

    Quote Originally Posted by JBsZ06 View Post
    15 percent drivetrain loss on a Dino with a manual.....closer to 20 percent with an auto
    C6 is 11-12% manual and about 15% auto.

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    Re: Corvette Stingray hits the dyno for the first time

    Quote Originally Posted by andretti View Post
    How do you see that? It appears to be less than the rated at the wheels
    So you posted this, thinking it negative publicity for the Corvette?

    Meanwhile, no, you aren't a malignant poster.

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    Re: Corvette Stingray hits the dyno for the first time

    Quote Originally Posted by SX3 View Post
    Horsepower rating for vehicles are done at the engine flywheel, not the net power output at the wheels. Typical driveline loss is about 17-25% if I remember correctly.

    The only time where power ratings get weird is with hybrids when the combined power of the engine and motor give the output figures.
    Typical driveline loss is about 15, I thought.

    It's not 25%, since that'd put the LT1 at over 500hp. 17% puts it at almost 500.

    I'm pretty sure the LT1 is SAE rated. Pretty sure it's what they say it is.

    That's about a 10% drivetrain loss, which is pretty impressive in my book.

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