With the higher torque (at lower rpm) and peak values, I wonder how a race would go if from rolling start? Say 20-30 mph to 1/4 mile? Similar weights and the GS should hold rpm well with torque advantage during shifts? The Z06 will stay wound up for sure. These are things I want to see when the GS starts getting tested.

 

Might be a 10.8 car

 

I think it could be somewhat close for a bit with the Z06 steadily pulling away from 75mph+ on.

 

My guess is even slightly quicker than that. In ideal (well-prepped near sea-level track, good air etc.) conditions, I think a bone stock Grand Sport coupe 1LT might even run a high 10.6 at over 126mph.

 

More interested in the SR vs GS et/mph the SR is going to be faster. Chevy will advertise the GS but you watch. Same everything even gear ratios.

 

I just posted these charts in another thread, look at the torque split between the Z06 and the GS at 3,000 rpms. It’s around 175 lb-ft. That’s a massive amount of torque AND hp in favor of the GS.



From a low roll or off the stoplight, not wound up in launch mode, just normal driving, on a short burst, low rpms, the GS should walk from the Z06 easily. Same weight, same gearing, massive increase in torque, massive increase in HP at low rpms.

Roll racing? Z06 has the win easily. If I had to guess official numbers for the GS I’d say 125 mph traps official (Z06 gearing definitely will help). Z06 has hit 135 in good air on the fast list, and is listed at 131 on Chevy’s website.

In the end it’s power to weight (a=Fm), you can’t beat Newton. Z06 has 135 hp over the GS on the top end. The GS has the power advantage at the low end so if you’re in that range you’re taking a Z06 down. On a road course the Z06 is in its element and will easily put the GS down.

On the drag strip the Z06 still wins because you’re sitting in the Z06’s power band for the entire run. Now when you start factoring in higher gears, rolling starts, shorter runs, the GS will be pound for pound be a challenge for the Z06.

 

I agree, as long as the Z51 gets traction (which will probably require a prepped surface) it beats the GS with less weight, rolling resistance/rotational mass and aero. I predict .2 and 3 mph in the 1/4
Does the GS have an advantage off the corner making 60 more ftlbs of torque at peak though?

 

Off the corner I don’t think it would matter, in road racing in the Z06 you’ll just make sure you’re in whatever gear gets you into your power band. So if there’s a situation where the GS is out torquing you in a Z06, shift down a gear so you’re coming out of the corner at 5,500 instead of 3,000. The hp advantage will still carry the day.

It’s all speculation at this point but I just don’t think there’s a scenario where a GS would beat a Z06 on a road course. Possible GS advantage in autoX because you’re always in low gears and low revs. It’s power to weight in the end; any scenario where the Z06 is able to stay in its power band, it’s going to be ahead. It’s just a more powerful car top end.

 

I’m not saying the GS will be faster than Z06 around a road course though maybe at autocross it has an advantage like you say. It’s actually 60 ft lbs more and if both are in the same gear at peak torque (460 vs 520) that happens at the same percentage of redline as 4600/6600 is almost identical to 6300/8600 which is going to help lessen the gap on the 135hp delta.

 

Yeah I guess it depends on which gear either car is in at a particular moment. Either way the GS has enough of a torque advantage at the low end to change my mind on getting a Z06. I really don’t care if it gets edged out on the drag strip or the road course. There’s still no way the GS is going to clear a 130 trap even on the best of days, and the Z06 can do that pretty consistently with decent DA. HP in the GS just isn’t there for those kinds of speeds. But that doesn’t mean as much to be as having the low end grunt which is why I ordered the GS.

Now ET?? Maybe it will be closer but the farther out you space the run the more the Z06 HP becomes more of an advantage. Burnouts would most definitely be easier to do in the GS, as well as launch mode where you most likely won’t need to use as much slip % or RPM to get the car to launch well.

Another hypothetical situation would be with regards 5th gear which we all know is really tall in these cars. When doing a long pull and hitting 5th there may be an advantage in the GS favor since it has more torque to pull that gear out, at least the Z06 wouldn’t pull as hard I would assume, but nonetheless it will still be ahead.

With respects to the original comment though, the GS should walk a Z06 on the low end of a roll or anything that puts the Z06 well out of its torque range. On the street day to day the amount or difference in power below 3k is pretty substantial (HP and TQ wise). Imagine being in 3rd at 2,500 rpm in the Z06 and leaning into the gas to pass someone without downshifting, and doing the same in the GS. The difference will be night and day.

If I’m on the street day to day I want the GS. If I’m going to the track I’m taking the Z06.

 

For sure, I don’t think even the Z51 will be able to hit 130mph in the 1/4 and GS will trap less than it.

Agreed, the GS can be just as quick to 60 mph launching at a lower rpm and faster if launching at the same low rpm possibly.

With the GS having a lower rpm it will use 6th gear for top speed unlike the Z06 which uses 5th, so that will help it up top some though hp of the Z06 will still favor triple digits. I suppose things might be interesting from a roll between a Z07 and aero deleted Z51 as the latter will have substantially less drag.

 

What if the GS has enough torque to pull 6th to a higher top speed than the Z06?? That would be an interesting stat to explain. 😂😂

Z06 takes 5th all the way to the top and hits the wall, GS grabs 6th and lugs it out for another 5 mph over the Z06; it’s entirely possible as the torque split at 3k is greater than the maximum HP split between the two engines.

 

The way I see it, Torque is what causes a change in velocity (acceleration). Horsepower is what sustains a velocity, once achieved. Here is a physics equation that coveys a feel for both from GROK. If you pick a few points off the HP-Torque graph you will see it checks out. The standard formula for horsepower (HP) in cars (and most automotive contexts) is:

HP = (Torque × RPM) / 5252

Where:

• Torque is in lb-ft (pound-feet)
• RPM is revolutions per minute
• 5252 is a conversion constant (derived from the definition of 1 horsepower = 550 ft-lb per second, plus the conversion from revolutions to radians).

Why the 5252 Constant?

• 1 horsepower = 550 foot-pounds per second.
• Torque in lb-ft × angular speed (in radians per second) gives power in ft-lb/sec.
• RPM to radians/second involves multiplying by 2π and dividing by 60, which simplifies to the factor of ~5252 when solving for HP..

Quick Examples

• 300 lb-ft of torque at 5000 RPM → HP = (300 × 5000) / 5252 ≈ 285 HP
• 400 lb-ft at 6000 RPM → HP = (400 × 6000) / 5252 ≈ 457 HP

You can rearrange it too:

• Torque (lb-ft) = (HP × 5252) / RPM

 

From a 30mph roll? I see the Z06 in first gear starting its walk, away from the GS. At this point the Z06 is going to begin making a little more average horsepower (and torque) at the rear wheels, than the GS.

 

No, 6th gear in the GS ends at 192mph vs 196 for 5th in the Z06.

 

What would solve this debate is if you blended the two graphs you made comparing them each to the C7Z06 auto together to see if there’s any overlap, though one can see the C8GS makes less than it and the C8Z06 more than it overall.

 

To do this bench racing exercise one can compare the total work done by the Z06 and GS between the start and finish speeds. Work is area under the HP curve. Add up the amount of work done by each car taking into consideration the RPMs at the start speed, shift points (assuming shifts at redline), and finish speed. The car that did the most work will be the fastest. There are nuances (drag, weight, shift time, perhaps short shifting, etc.) but they will likely be noise level for this comparison. An easier way would be just compare the work done between the previous shift point and redline for a representative portion between the start and finish speeds.

 

I completely forgot to take higher rpm of the Z06 into consideration! Yes the Z06 will pull each gear higher since it has another 2,000 rpm.

Again it just shows how the higher HP car will deliver in the end over the torque of the GS. It would have been funny to see the GS torque figure to pace out the Z in certain situations. The Z just has too much power on the high end for the GS to compete.