Z0Sick6

"It comes as no surprise, except to maybe one person, that the 2014 Corvette Stingray Z51 outperforms one of its predecessors, the 2009 Corvette C6 Z51, based on testing results by Edmunds. The same driver was used for both models, with the new Corvette out-accelerating the marginally lighter C6, and posting a faster quarter-mile time. Notably, both models have the same gear ratios through gears 1-6, with the 2014 Corvette offering a seventh gear.
However, what really stands out as huge improvements with the Stingray Z51 compared to the C6 Z51 are the braking distances (93 feet to 110 feet), skid pad (1.08G to .95 G), and slalom (72.8 mph to 67.9 mph). Impressive stuff."
http://gmauthority.com/blog/2013/07/...-corvette-z51/

Full Data and Numbers:

http://www.edmunds.com/car-reviews/t...rack-test.html

C7pimp

Did they just slap an article together with using the old test data from the C6 instead of actually comparing the cars dude by side?

genv6.2gm

how dare they compare it to the Z51 and not a z06. ha

strap in, people are going to complain that it didn't outperform the $25,000 more expensive Z06 from only 7 years of progress. all while carrying all the beautiful creature comforts.

CREST

LT1_E85_Corvette

These cars are about the same price MSRP once you put inflation into the mix (1LT, Z51, Mag Ride C7 vs. 1LT, Z51 C6).

These are really good facts really. The C6 is still such a monster car for the money in regards to strait line acceleration which nearly matches the C7! WOW. I'm starting to realize that the new Corvette is designed for turns more than anything, and man! does it shine

Side note:
Once the C7 is tuned, there will be much more available in regards to untapped HP than the C6. They have put a Chasity belt on the C7 for MPG, and to protect the C6 Z06. SOOOO excited to be part of the mod process

peter pan

Awesome results and marked improvement over our C6s

torquetube

I'd like to see how a C6 does on the new Pilot Super Sport ZPs.

lathrash

I would like to see a comparison with the C6 wearing the same Michelin Pilot Super Sport tires as the C7, rather than the Goodyear Eagle F1 Supercar tires it came with from the factory.

OnPoint

This thread ought to get interesting. . . .

sam90lx

C7 boys would be crying!

Kappa

No not really.

The C6 GS was quicker around the track than the C6 Z51 and with a C7 Z51 tire setup would lap 1 second quicker around VIR.

That would put the C6 GS on C7 wheel/tire package at 2:53, and the C7 Z51 still at 2:51.78.

The C6 Z51 would be far behind in my estimation, especially with the inferior brake setup, even with the C7 wheel package.

Just like the C5 Z06, the C6 Z51's straightline acceleration would be comparable to the C7's, but when the road starts turning, the C7's chassis, suspension, and aero refinements come into play.

The Corvette's power to weight ratio hasn't changed all that much since the C5 Z06(excluding the Z cars). You are getting continued refinement of everything else though.

Turbooo2u

Exactly! Wow, the C7 is PORKY!

Achmed

So GM put the C6 at 0-60 4.2 seconds and 1/4 mile 12.6 seconds (correct me if i'm wrong, i'm assuming that's z51?)

And GM put the C7 at 0-60 3.8 and 1/4 mile 12.0, so they're saying the C7 is 0.4 seconds quicker 0-60 and 0.6 seconds quicker 1/4 mile.

The gap is less with edmunds testing - the 0-60 gap is only 0.2 (versus 0.4) and 1/4 mile gap is only 0.3 (versus 0.6).

Was GM being conservative or average with the C6 acceleration, and being aggressive with its C7 quoted acceleration? Perhaps becasue they felt they need to show a marked improvement over the C6.

I have a deposit in for a C7 and I love the car and have never owned a C6 or any vette for that matter, but being unbiased it seems like the C7 haters were kinda right when they said there won't be much difference in performance (straight line of course, not road course). Say you put them both on the same Michelin tires, the 0.2 and 0.3 second 0-60 and 1/4 mile gaps would probably decrease to something trivial. So really the C7's better stock tires give it a slight edge in straight line acceleration over the C6. The extra 25 horsepower mostly gets nullified by the extra weight.

sam90lx

Spot on! The C7 gets a way better tire than the GS ever got. The HP and weight are a wash.

Achmed

I can finally say I agree with you

Different topic but I still think the new styling and for those who track their cars (not me) the improvement in cornering is enough of an improvement to justify buying a C7. But straight line performance is a marginal improvement pretty much just due to tires.

Hopefully it'll be easy to tune these to try to get something measurably faster than the C6.

Kappa

Straightline, I doubt the C7's tires are helping that much. The C6 Z06 and ZR1 didn't get any quicker with Cup tires on them. Stopping and turning however, made a huge difference.

Like I said, the C5 Z06/C6 Z51/C6 GS/C7 Z51 all have pretty similar power to weight ratios. Everything else around the car is going to go in the C7's favor, even if they all have the same Michelin SS tire.

RedLS6

I think that the above math works out.

What bothers me is that I would have guessed that the E-diff on the C7 would be worth at least ~1 second difference by itself, in terms of improved corner entry/exit on VIR's 4+ mile Grand course. Then, add in the brakes, chassis/suspension refinements and the much-improved low-end torque, and I would have thought we'd see a little higher delta between these two times.


.

jsiddall

Agreed about the tires not really being a big factor in acceleration. Look at the trap speed and you can expect that even with identical tires the C7 would still be faster. Also keep in mind that even though peak HP delta might be somewhat cancelled out by the extra weight of the C7 the rest of the power band is significantly better on the LT1 due to VVT. That makes a real difference in acceleration.

theseal

I don't know where you are getting that from... tires are the only thing that touch the ground. There is no way to compare unless you do back to back.

I can put the metal down well enough to stress the potential of a set of tires, and I can tell you that going from 2 year old Goodyears to brand new ones is worth more than 1 second around most tracks. Shave a new set and that's another .5 or more. if these michelines are really a much better tire, they are probably worth more than a second. probably much more.

If you are running really old tires seconds can start piling up like mad.

Running modern 100+ treadwear track tires (e.g. nitto, a048, pilot sport cup) is worth 2-4 seconds on most tracks against factory goodyears, and running a set of Kumho 710's or Hoosier A6's is often worth another couple of seconds.

Unfortunately, the information provided is simply *no* data from which to make a comparison. If they said, 'same day' 'same tires' 'zero miles stock c6z' then we would have a comparison.

I do expect the brakes on the c7 will be much better. I do expect the 'feel' to be better. The car will probably lap a little better on the same tire and wheel. But right now, there is no data. But the reality is probably that if you meet up on track with a stock c7, against a stock c6z on good tires with its wider wheels, the c6z is likely to be faster.

nicer? that's subjective, but lap times.... that's probably how it will shake out.

Kappa

Jim Mero. Did a back to back test with the GYII 275/325 setup vs the Michelin SSZP 245/285 on a C6 Z06. Said the new tires were worth a second at VIR.

I'd imagine the C7 setup would be worth about the same on a GS. Maybe I'm wrong.