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Discussion Starter · #1 ·
Quote, originally posted by GM »
GM Is First To Certify Horsepower and Torque Under New SAE Test Procedure
Corvette Z06 now rated at 505 horsepower

Detroit - General Motors has become the first manufacturer to certify its horsepower and torque rating using the new Society of Automotive Engineers (SAE) test procedure J2723. The 7.0L LS7 engine for the 2006 Corvette Z06 is the first to be certified under the new test procedure at 505 horsepower @ 6300 rpm and 470 lb-ft @ 4800 rpm.
"The new voluntary SAE power and torque certification procedure ensures fair, accurate ratings for horsepower and torque as it uses third-party certification," said Jim Queen, GM vice president, global engineering and the general chair for the 2005 SAE World Congress. "SAE technical standards level the playing field and this certification procedure is just the latest example of the value SAE has offered over the past century."
"We're very proud to be the first to certify engines with the new procedure and pleased with the LS7 certification results," said Tom Stephens, group vice president of GM Powertrain. "Going forward, GM will certify its engines to the new procedure as we want customers to have accurate information when they make a purchase decision. GM encourages all manufacturers to do the same."

so, does anyone know the difference in testing procedures? Seems like theres an opportunity to "get" more power.
 

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Re: GM Is First To Certify Horsepower and Torque Under Ne ... (PokeyD16Z)

Quote, originally posted by PokeyD16Z »
so, does anyone know the difference in testing procedures? Seems like theres an opportunity to "get" more power.

The point of this is that all engines will be rated by a third party that has no interest in giving more power to any particular engine. For instance if Subaru decided to test the power of the EJ20T in the WRX while blowing huge amounts of 20 degree air at the intercooler and intake it would make more power, but that would be disingenuous as most people would never see the advertised power.
You follow?
On another note, damn wow holy jebus 505 horsepower. http://****************.com/smile/emthup.gif
 

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Re: GM Is First To Certify Horsepower and Torque Under New SAE Test Procedure (PokeyD16Z)

Im might not prevent things like the Mazda RX8 fiasco that leaded to replaced cars for not having 250hp as advertised, but instead 238hp.
It seems like the original Horsepower measure its changing, all because an inaccurate way of measuring, THIS HAPPENING IN THE 21TH CENTURY? WTF
 

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Discussion Starter · #5 ·
Re: GM Is First To Certify Horsepower and Torque Under Ne ... (serrano)

Quote, originally posted by serrano »

The point of this is that all engines will be rated by a third party that has no interest in giving more power to any particular engine. For instance if Subaru decided to test the power of the EJ20T in the WRX while blowing huge amounts of 20 degree air at the intercooler and intake it would make more power, but that would be disingenuous as most people would never see the advertised power.
You follow?
On another note, damn wow holy jebus 505 horsepower. http://****************.com/smile/emthup.gif

yup, i follow. So, this should level the playing field if it were mandatory. There will still be some differences, though, since it is voluntary. But, it seems like the Z06 benefited from it http://****************.com/smile/emthup.gif
 

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Re: GM Is First To Certify Horsepower and Torque Under Ne ... (PokeyD16Z)

Quote, originally posted by PokeyD16Z »

yup, i follow. So, this should level the playing field if it were mandatory. There will still be some differences, though, since it is voluntary. But, it seems like the Z06 benefited from it http://****************.com/smile/emthup.gif

Why, what were the previous numbers for the C6 Z06. I've been hearing 500hp for a while.
 

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Discussion Starter · #7 ·
Re: GM Is First To Certify Horsepower and Torque Under Ne ... (geoken2)

Quote, originally posted by geoken2 »

Why, what were the previous numbers for the C6 Z06. I've been hearing 500hp for a while.

yeah, 500...it gains 5hp. only 1%, but now GM can claim that it beats the Viper in HP if it wants to.
 

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Discussion Starter · #9 ·
Re: (Ray from NJ)

Quote, originally posted by Ray from NJ »
Viper HP is typically underrated. I've seen many dyno #'s that put the crank HP in the 510 - 530 range. (remember driveline loss is around 15%)
http://vca2.viperclub.org/foru...54298

who gives a crap? Not the consumer who is reading the numbers that the manufacturer gives or that marketing presents them.
 

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Re: GM Is First To Certify Horsepower and Torque Under New SAE Test Procedure (PokeyD16Z)

three things:
1. Bravo for being the first at a technical advancement (of sorts)
2. Wow, 505hp.
3. http://****************.com/smile/emthup.gif to the whp suggestion, though it'd be unlikely to happen as hp numbers would 'drop' as a result much like the SAE gross->net shift
p.s. wonder what this 3rd party's sample size is to determine a number b/c of variance between engines...
 

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Re: GM Is First To Certify Horsepower and Torque Under New SAE Test Procedure (vdv)

so no more underrating hp? this is going to hurt a few things. like the "gentleman's agreememnt" on japanese cars or the muscle cars of old who wanted to keep insurance costs down..
 

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Re: GM Is First To Certify Horsepower and Torque Under New SAE Test Procedure (Sharpix)

Quote, originally posted by Sharpix »
Im might not prevent things like the Mazda RX8 fiasco that leaded to replaced cars for not having 250hp as advertised, but instead 238hp.
It seems like the original Horsepower measure its changing, all because an inaccurate way of measuring, THIS HAPPENING IN THE 21TH CENTURY? WTF

i once read an article regarding the rx-8 and low dyno numbers; it said it was due to the car pulling timing from the cats getting too hot, because of the lack of airflow underneath the car.
 

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Re: GM Is First To Certify Horsepower and Torque Under New SAE Test Procedure (stock60)

Quote, originally posted by stock60 »
so no more underrating hp? this is going to hurt a few things. like the "gentleman's agreememnt" on japanese cars or the muscle cars of old who wanted to keep insurance costs down..

Well the gentleman's agreement went out the window recently, so that's done. Under-rating is still out there though. Hint hint, the 2.0 Ecotec doesn't make only 205 hp, it's more like 205 hp to the wheels.
On another note, I start working at the facility that makes the LS7/supercharged Northstar next week.
 

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Re: GM Is First To Certify Horsepower and Torque Under New SAE Test Procedure (stock60)

Quote, originally posted by stock60 »
so no more underrating hp? this is going to hurt a few things. like the "gentleman's agreememnt" on japanese cars or the muscle cars of old who wanted to keep insurance costs down..

Japan doesn't measure horsepower in the first place, so this doesn't affect them.
 

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Re: GM Is First To Certify Horsepower and Torque Under New SAE Test Procedure (3WheelGTi)

Quote, originally posted by 3WheelGTi »
Well the gentleman's agreement went out the window recently, so that's done. Under-rating is still out there though. Hint hint, the 2.0 Ecotec doesn't make only 205 hp, it's more like 205 hp to the wheels.
On another note, I start working at the facility that makes the LS7/supercharged Northstar next week.

congrats! get me an internship
 

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Re: (PlatinumGLS)

thats good stuff! 505hp. impressive.
i guess this is mainly to stop manufacturers from overrating cars.
 
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