Dyno Tested! 2015 Corvette Z06 vs. 2014 Viper TA

[Nine Ball]

I spent all day at www.KPRacing.com doing dyno testing on a few stock vehicles. We collected data from these cars:


2013 Viper GTS (100% stock) 7,000 miles
2014 Viper TA (100% stock) 2,300 miles
2015 Corvette Z06 (100% stock) 1,200 miles
2015 Corvette Z06/Z07 (100% stock) 100 miles (previously dyno tested, last week)

Since we ran the Viper TA and the black C7Z in our last video, where the Viper won 7 races in a row, we wanted to get both of them on the same dyno, on the same day. We learned a lot about both cars. The Viper runs stronger when it is hot. Both cars put down their best numbers at normal operating temperatures, and their worst numbers when allowed to cool off too long. Ambient temps in the shop were mid-50F range.

Summary: The Corvette Z06 wins on paper, the Viper wins on the street. That extra 200 lbs that the Corvette carries over the Viper, is likely the reason.

Read the article, see the video and photos here:
http://nineballgarage.wordpress.com/2014/12/30/dyno-tested-2015-corvette-z06-vs-2014-viper-ta/

Tony

[Eachey51]

Good stuff nineball!!

[XSnake]

yep, 20rwhp will not overcome an extra 200lbs.

[Nine Ball]

I had some time to sort and analyze all the data. Here are my observations, since I'm a math/numbers guy. Looking only at the sessions of 4 back-to-back runs here, all SAE corrected values, rounded to nearest whole number.


Since it was cool outside, both cars showed interesting temperatures at the intake manifold, after the four runs. The Viper intake manifold actually got colder by 12F after the pulls. The Z06 was still impressive though, the supercharger housing (intake manifold) only increased 1 degree, after 4 consecutive pulls. Both good, in that regard. The IAT values were another story. The Viper increased in measured Air Intake Temp by 13F. The Z06 did much better, with both IAT1 (pre-blower) and IAT2 (post-blower) both reducing after the 4 consecutive runs. GM did a great job on the cooling efficiency on this blower. But, the true test will be seeing how they perform when it is hot outside.


Coolant and engine temps were also interesting to compare. The Viper only picked up 1 degree on the coolant temperature. The Z06 picked up 19 degrees, still respectable. This could translate to lap times on long sessions, as it seems the Viper cooling system is super efficient. Oil temps for both cars were similar gains, 20 Viper and 25 Z06.


2014 Viper TA


Initial Temps:
Intake Mani Temp 115F
IAT 69F
Oil 174F
Coolant 185F


Run 1
HP 531
TQ 495


Run 2
HP 538 (+7)
TQ 511 (+16)


Run 3
HP 540 (+2)
TQ 512 (+1)


Run 4
HP 540 (+0)
TQ 517 (+5)


Final Temps:
Intake Mani Temp 103F (-12)
IAT 82F (+13)
Oil 194F (+20)
Coolant 186F (+1)


2015 Corvette Z06


Initial Temps:
Intake Mani Temp 133F
IAT1 66F
IAT2 90F
Oil 176F
Coolant 189F


Run 1
HP 552
TQ 560


Run 2
HP 563 (+11)
TQ 562 (+2)


Run 3
HP 563 (+0)
TQ 563 (+1)


Run 4
HP 559 (-4)
TQ 566 (+3)


Final Temps:
Intake Mani Temp 134F (+1)
IAT1 64F (-2)
IAT2 73F (-17)
Oil 201F (+25)
Coolant 208F (+19)

[Steve M]

Man that ZO6 sounds nice...love the table top torque curve too.

[J TNT]

20 HP extra and 200 lbs more typically cancel out , sounds like the Vette wieghs more than 200lbs extra . jmo

[swexlin]

Good stuff there. Have some reading to do tonight!

[slitherv10]

That's an excellent side by side comparable! Really puts things into perspective. Where do you think the extra weight is on the Vette and what can they do to lose that weight without sacrificing the price and or quality of build.

[TooBlue]

IMO...
With the stats so close it boils down to the driver. Plain and simple.

Something that has not been measured is side by side performance on a road course. The driver, the cars handling and lap times are what is important.

The above dyno stats were at WOT. How often are you at wide open throttle on the track?
Also, if one car handles better than the other the WOT straight-line HP won't mater. The better handling and better driven car will set better lap times regardless of Dyno or straight line results.

It's that simple.

[BlknBlu]

Gearing will make a difference too. all previous GEN's have 3:07's and the new cars are 3:55.

Bruce

[Snakebit10]

Interesting...The Z is really putting the power down but the poundage is too much for 20hp advantage to make a difference against the TA in the straights. Its already got so many lightweight parts etc standard I just dont know where they could save 200lbs weight except by stripping the interior of some of its luxuries etc. I still want to see these two around a circuit track. I think it should shine there ultimate laptime-wise at least for a few laps.

[Steve M]

Gearing will make a difference too. all previous GEN's have 3:07's and the new cars are 3:55.

Bruce

Yes, but the transmission ratios were also changed in the Gen 5.

[FLATOUT]

I expect the Z to have heat issues on track as soon as it gets warm. I could be wrong but I just don't see it taking the abuse the Viper does with that small blower.

[EdwardETraylorIII]

They are deleting my posts in your thread(s) over on corvetteforum now because I state fact and they are butt hurt. That's funny as hell.

[J TNT]

Funny how the Viper gets looked over by some, for its simple approach , but it works very well !

Ironicly similar battle as Ferrari and Shelby .

[Space Truckin]

Funny how the Viper gets looked over by some, for its simple approach , but it works very well !

Ironicly similar battle as Ferrari and Shelby .

The Rodney Dangerfield of Supercars :United_States:

[96_GTS]

Excellent stuff guys. Thanks Nine Ball for the great information. Oh BTW, it was great talking with you at the COTA event a few weeks ago.

Also a great comment by J TNT...
"Ironically similar battle as Ferrari and Shelby." So true when you look at the history.

[Jack B]

Tony

Very nice, however, there has to be another piece to the puzzle, in the race video, in some of the races the viper looked like the pwr/wt diff was more dramatic than the dyno results?

[Policy Limits]

Dude if SRT doesn't give u a new complimentary Hellcat for new year's then something is off in Detroit. ;)

[PaulP]

But the Z06's front end didn't lift on the dyno ? :smilielol: Great job tony, i think your the new online super car editor for 2015!

[Voice of Reason]

Tony

Very nice, however, there has to be another piece to the puzzle, in the race video, in some of the races the viper looked like the pwr/wt diff was more dramatic than the dyno results?

In 4th where the Viper really pulls could some of it be due to our 3.55 rear end vs their (I think) 3.42?

[FrgMstr]

Gear stats on both cars:

0809: 2.66, 1.82, 1.30, 1.00, 0.741, 0.50 - 3.07 rear
2010: 2.66, 1.82, 1.30, 1.00, 0.796, 0.50 - 3.07 rear
13/15: 2.66, 1.58, 1.19, 1.00, 0.770, 0.63/.050 - 3.55 rear


Corvette ZR1 2013
2.29, 1.61, 1.21, 1.00, 0.82, .068 3.42 rear.

Corvette Z06 2015 Manual
2.29, 1.61, 1.21, 1.00, 0.82, .068, .045 3.42 rear

[Boba Fett]

Good shit

[Boba Fett]

I expect the Z to have heat issues on track as soon as it gets warm. I could be wrong but I just don't see it taking the abuse the Viper does with that small blower.

Agree completely

[Boba Fett]

They are deleting my posts in your thread(s) over on corvetteforum now because I state fact and they are butt hurt. That's funny as hell.

bunch of little girls

[05Commemorative]

already been said, but when you factor in the tire sizes of both cars, the gear ratios are virtually identical in 4th gear.


In 4th where the Viper really pulls could some of it be due to our 3.55 rear end vs their (I think) 3.42?

[plumcrazy]

tony, have you guys talked about switching rides for a run or two ? or let two other trusted drives give it a go ?

[slitherv10]

tony, have you guys talked about switching rides for a run or two ? or let two other trusted drives give it a go ?


^^^^^^^^^This I would love to see. That would solidify any questions form anyone on this side or that side of the pond.

[Jack B]

Tony, since you like math, here is your homework assignment. Take the torque/rpm table and integrate it from 3000 to 6000 rpm, that will give you an effective/single torque for each car for the complete dyno pull, if those numbers are close, then, something affects the power output when the cars are moving.

[rw99]

Tony, since you like math, here is your homework assignment. Take the torque/rpm table and integrate it from 3000 to 6000 rpm, that will give you an effective/single torque for each car for the complete dyno pull, if those numbers are close, then, something affects the power output when the cars are moving.

Jack beat me to it. Torque delivery expressed as area under the curve (integrated) may provide additional insight on the Viper's demonstrated advantage.

And I may have missed it, but is that Z06 also a manual trans?

Thanks for posting! I love a well-considered experiment.

[Bruce H.]

Great job, Tony!

[PaulB]

Tony, what kind of Dyno was it?

[PaulB]

Woops, guess I missed it in your original post, Mustang.... Never mind...

[Nine Ball]

Jack, check this out. Good analyses by a member there.

http://www.corvetteforum.com/forums/c7-z06-discussion/3584080-z06-vs-viper-powerband-comparo.html

rw99, the Z06 is a manual. No automatic Z06's have been released to public yet. I think those come out in late Jan.

[ViperJon]

It's frankly embarrassing how some of these guys are clinging to Synergy's video as a kill for the Z06.
Despite all the factual backstory of the heavy passenger in the TA.
And yet they went to the ends of the earth clutching at any straw to disprove Nineball's which couldn't have been more detailed.

[Nine Ball]

Synergy should have whoever hosted the video lay out the facts on the video description.

-Starting speed
-Weight of driver/passengers in both cars
-Gears used

Adding 300 lbs to a Viper, above a Corvette, is certain to give up a win. I think whoever hosted that video was just trying to get hits, but for the wrong reasons. But, if it gives C7Z owners hope, then maybe I'll enjoy lining up with them some more.

[FLATOUT]

I can't wait to see what some of these tuned, pulley, exhaust package cars are going to trap.


Synergy should have whoever hosted the video lay out the facts on the video description.

-Starting speed
-Weight of driver/passengers in both cars
-Gears used

Adding 300 lbs to a Viper, above a Corvette, is certain to give up a win. I think whoever hosted that video was just trying to get hits, but for the wrong reasons. But, if it gives C7Z owners hope, then maybe I'll enjoy lining up with them some more.

[Junkie]

I can't wait to see what some of these tuned, pulley, exhaust package cars are going to trap.

I don't have crazy high hopes, the blower is just so small.

I think a full bolt on Viper like PDV vs a bolt on Z0 is still going to be a close race.

[Jack B]

That is an excellent thread, you still made some grown men cry.

a couple of comments on the thread;

1. The ram air could be the variable.

2. Our cars only drop to 4800-5100 at the shift, no need to look elsewhere


Jack, check this out. Good analyses by a member there.

http://www.corvetteforum.com/forums/c7-z06-discussion/3584080-z06-vs-viper-powerband-comparo.html

rw99, the Z06 is a manual. No automatic Z06's have been released to public yet. I think those come out in late Jan.

[allans]

I had some time to sort and analyze all the data. Here are my observations, since I'm a math/numbers guy. Looking only at the sessions of 4 back-to-back runs here, all SAE corrected values, rounded to nearest whole number.


Since it was cool outside, both cars showed interesting temperatures at the intake manifold, after the four runs. The Viper intake manifold actually got colder by 12F after the pulls. The Z06 was still impressive though, the supercharger housing (intake manifold) only increased 1 degree, after 4 consecutive pulls. Both good, in that regard. The IAT values were another story. The Viper increased in measured Air Intake Temp by 13F. The Z06 did much better, with both IAT1 (pre-blower) and IAT2 (post-blower) both reducing after the 4 consecutive runs. GM did a great job on the cooling efficiency on this blower. But, the true test will be seeing how they perform when it is hot outside.


Coolant and engine temps were also interesting to compare. The Viper only picked up 1 degree on the coolant temperature. The Z06 picked up 19 degrees, still respectable. This could translate to lap times on long sessions, as it seems the Viper cooling system is super efficient. Oil temps for both cars were similar gains, 20 Viper and 25 Z06.


2014 Viper TA


Initial Temps:
Intake Mani Temp 115F
IAT 69F
Oil 174F
Coolant 185F


Run 1
HP 531
TQ 495


Run 2
HP 538 (+7)
TQ 511 (+16)


Run 3
HP 540 (+2)
TQ 512 (+1)


Run 4
HP 540 (+0)
TQ 517 (+5)


Final Temps:
Intake Mani Temp 103F (-12)
IAT 82F (+13)
Oil 194F (+20)
Coolant 186F (+1)


2015 Corvette Z06


Initial Temps:
Intake Mani Temp 133F
IAT1 66F
IAT2 90F
Oil 176F
Coolant 189F


Run 1
HP 552
TQ 560


Run 2
HP 563 (+11)
TQ 562 (+2)


Run 3
HP 563 (+0)
TQ 563 (+1)


Run 4
HP 559 (-4)
TQ 566 (+3)


Final Temps:
Intake Mani Temp 134F (+1)
IAT1 64F (-2)
IAT2 73F (-17)
Oil 201F (+25)
Coolant 208F (+19)

Nine Ball, I think your runs may show why the Z06 has power issues. If you look at the final oil vs water temp on the Vette, the water temp is HIGHER than the oil temp. This could mean that the water cooling can't keep up with the increase in engine heat, thereby causing the ECU to begin pulling power. You can see with the Viper it is the opposite, where water temp is LOWER than oil temps.This indicates the water is cooling the engine. In both cases, I'm assuming the thermostats are open. Allan

[viper04]

Tony
Once again nice!! thanks for posting but I was just wondering what was the final AFR for the Vette. I did not understand what value was used to come out with the 10.45 AFR comd (afr) Thanks.