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."

 

Any info on the differences in the new and previous specifications?

 

I wonder if this means the days of under-rating engines will be over? It'd be interesting to an f-body LS1 dynoed to the new procedure.

 

That's what it sounds like since the figures/ratings are to come from third party testers/certifications.

On the plus side, you wouldn't have to remind every other know-it-all dolt out there that the Cobra's blown 4.6L, Mach'1 N/A 4.6, Ls1, etc... are actually underrated and put out more than advertised. I really hated arguing with people on the actual output of the ls1 (a lot viewed 305-320hp factory rating as holy grail). But on the downside, there won't be any pleasant surprises. There's a satisfaction in your 305hp car dyno'ing 290+ to the wheels.

 

Heh.

Thar's some Dudges and Ferds that oughta step in line fer thar ***-whippins in the near future.

505.

***-kicking courtesy of the LSx family. I don't want to hear any more s**t about pushrods, EVER.

 

Pushrods are old tehnology. There is no way they can make power and get good fuel economy.

Plus, DOHC Honda motors make more power per liter, and as we all know that is the most important thing.

Oh, I thought it was opposite day when I posted that.

 

Why is the U.S. still using SAE ratings instead of DIN?

 

 

DIN is almost the same as SAE net so what would the point of switching to that be

 

It's really just a number, and is only meaningful in relative terms. So it doesn't matter what method they use or what they call it, as long as everyone in the market does the same then that's all that matters. Or are you concerned that your engine produces exactly as much as 275 theoretical horses would?

 

Why is the US still using horsepower and pound-feet instead of watts and newton-meters?

 

Because we've got the bombs.

When somebody gets as many bombs as we have, we'll think about changing.

 

 

Because DIN is the German standards organization, Deutsches Institut für Normung, whereas SAE is the Society of Automotive Engineers.

Happy to help.

 

I thought the answer to both redzed's and my questions was "who cares." Glad to see the expert opinion on it.