650 hp
Team Owner
Joined: Oct 2007
Posts: 26,745
Likes: 694
From: PA
So 650 hp can only muster 123 mph? Hahah Surely you can't be serious. Even a computer tune isn't giving that much HP. Not for a smooth idle only 6.2 liter engine. Or are you saying the 1/4 mile is indicative of 495 HP?
Last edited by TLS_Addict; Oct 23, 2019 at 09:18 PM.
Race Director
Joined: Dec 2006
Posts: 12,396
Likes: 2,912
From: Fort Worth, Texas
This engine should be nicknamed the unicorn as I can’t think of any other 6.2L NA V8 that makes that much torque, BMEP is higher than NASCAR cup engine and it’s emissions compliant to boot lol
Team Owner
Joined: Feb 2013
Posts: 22,598
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Intermediate
Joined: Jul 2019
Posts: 30
Likes: 69
From: Illinois
Opinions vs. Laws of Physics
Noting all the fuss over MT’s dyno pulls. Just something to think about here, It appears from the posted 1/4 mile et. and speed, that the car supplied to Motor Trend did INDEED have at LEAST 550 hp on tap. The Z51 - 3LT C8 weighs at Least 3650 lbs. when coolant, lubricants, and fuel are on board. The driver weighs somewhere in the neighborhood of 150 (plus) pounds, for an “as tested” weight of 3800 lbs. If the et is correct at 11.1 sec. and the speed is correct as 123.2 mph then this particular C8 was making at LEAST 550 hp. Could it be a ringer? who knows, but the math doesn’t lie. Just something to think about.
Banned Scam/Spammer
Joined: Aug 2015
Posts: 3,166
Likes: 3,781
Noting all the fuss over MT’s dyno pulls. Just something to think about here, It appears from the posted 1/4 mile et. and speed, that the car supplied to Motor Trend did INDEED have at LEAST 550 hp on tap. The Z51 - 3LT C8 weighs at Least 3650 lbs. when coolant, lubricants, and fuel are on board. The driver weighs somewhere in the neighborhood of 150 (plus) pounds, for an “as tested” weight of 3800 lbs. If the et is correct at 11.1 sec. and the speed is correct as 123.2 mph then this particular C8 was making at LEAST 550 hp. Could it be a ringer? who knows, but the math doesn’t lie. Just something to think about.
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Racer
Joined: Jun 2015
Posts: 272
Likes: 39
From: San Antonio TX
Noting all the fuss over MT’s dyno pulls. Just something to think about here, It appears from the posted 1/4 mile et. and speed, that the car supplied to Motor Trend did INDEED have at LEAST 550 hp on tap. The Z51 - 3LT C8 weighs at Least 3650 lbs. when coolant, lubricants, and fuel are on board. The driver weighs somewhere in the neighborhood of 150 (plus) pounds, for an “as tested” weight of 3800 lbs. If the et is correct at 11.1 sec. and the speed is correct as 123.2 mph then this particular C8 was making at LEAST 550 hp. Could it be a ringer? who knows, but the math doesn’t lie. Just something to think about.
Last edited by Phantom Blur; Oct 24, 2019 at 07:04 PM.
Pro
Joined: Jul 2019
Posts: 678
Likes: 499
From: Canada 🇨🇦
Is the 650hp true? Nope. Disappointed that someone like Motor Trend would put their reputation in question by publishing garbage like this without multiple vehicles tested to get an average or abnormalities.... If it comes out that it was an abnormality and no others perform/test like this dyno test moving forward nobody
will believe anything they say/publish without doubt in their minds ....
It’s sad really....
will believe anything they say/publish without doubt in their minds ....
It’s sad really....
Last edited by NoSoupForU; Oct 24, 2019 at 07:08 PM.
Melting Slicks
Joined: Jan 2013
Posts: 2,828
Likes: 432
Is the 650hp true? Nope. Disappointed that someone like Motor Trend would put their reputation in question by publishing garbage like this without multiple vehicles tested to get an average or abnormalities.... If it comes out that it was an abnormality and no others perform/test like this dyno test moving forward nobody
will believe anything they say/publish without doubt in their minds ....
It’s sad really....
will believe anything they say/publish without doubt in their minds ....
It’s sad really....
Race Director
Joined: Dec 1999
Posts: 10,230
Likes: 885
From: Alexandria, Virginia, USA VA
I cannot fathom how MT can write an article on the accuracy of SAE engine certification testing, and then post something ridiculous like this.
jeez louise, how dumb can you be??? Engineering accuracy of these tests follows VERY rigorous testing processes
the quarter mile MPH is very telling as well about the true RWHP
I've seen "happy dyno" results but this is just completely ridiculous
CF Community Team
Joined: Apr 2016
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From: Pittsburgh
2025 C6 of the Year Finalist - Unmodified
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I cannot fathom how MT can write an article on the accuracy of SAE engine certification testing, and then post something ridiculous like this.
jeez louise, how dumb can you be??? Engineering accuracy of these tests follows VERY rigorous testing processes
the quarter mile MPH is very telling as well about the true RWHP
I've seen "happy dyno" results but this is just completely ridiculous
jeez louise, how dumb can you be??? Engineering accuracy of these tests follows VERY rigorous testing processes
the quarter mile MPH is very telling as well about the true RWHP
I've seen "happy dyno" results but this is just completely ridiculous
SAE testing is dead nuts on, the age in which car companies purposely underrated engine horse power is long gone
Le Mans Master
Joined: Oct 2005
Posts: 7,088
Likes: 1,829
From: Metro Detroit Michigan
Is the 650hp true? Nope. Disappointed that someone like Motor Trend would put their reputation in question by publishing garbage like this without multiple vehicles tested to get an average or abnormalities.... If it comes out that it was an abnormality and no others perform/test like this dyno test moving forward nobody
will believe anything they say/publish without doubt in their minds ....
It’s sad really....
will believe anything they say/publish without doubt in their minds ....
It’s sad really....
Advanced
Joined: Oct 2019
Posts: 84
Likes: 23
This is Motor Trend. 3 out of 5 of their 650 bhp C7 Z06's only ran 124 mph and they are 100 lb lighter.
Race Director
Joined: Dec 2006
Posts: 12,396
Likes: 2,912
From: Fort Worth, Texas
What were the weather conditions when they ran as I’m assuming they were pulling timing, were they running 91 octane, what aero package was on them and were they manuals?
Safety Car
Joined: Jun 2003
Posts: 4,250
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From: San Diego Ca
Burning Brakes
Joined: Nov 2010
Posts: 994
Likes: 30
From: Aurora Colorado
Why was GM so guarded and what compelled MT to sneak a dyno run? Because they smelled a rat. And guess what? It was a ringer. Surprise, surprise! The times are fake. Manufacturers cheat and magazines are the usual dupes. Look at what VW tried to get away with. This was just a little white lie for them and they got busted.
Drifting
Joined: Jul 2019
Posts: 1,325
Likes: 701
After seeing all the hoopla over the dyno results MT reported, the GM Corvette Powertrain Engineers replied with "Science is hard"...as an AE that sums my thoughts up nicely too. We know for sure it pulled 495 SAE at the crank.