2015 Corvette Z06 Performance Numbers
01-08-2014, 02:04 AM
#61
Le Mans Master
Yes... It does.
When you see numbers like this on a forced induction motor it means that the torque will drop off in the high range; how much depends on the rpm limit.
If we assume 7k rpm redline, and peak torque of 650, and peak HP at 620 we can calculate that if peak torque was made at red line, peak hp would be 866; so if your reverse the math you can determine that peak torque is made no later than 5000rpm, and that at 7k rpm the engine is making no more than 465 ft/lbs of torque
So what does this tell us? Most likely that the blower is a pretty small unit, and that it is going to have the classic "too small" torque curve. It will come on strong in the low rpm band, peak in the mid range, then taper off at an increasing rate as RPM increases.
When you see numbers like this on a forced induction motor it means that the torque will drop off in the high range; how much depends on the rpm limit.
If we assume 7k rpm redline, and peak torque of 650, and peak HP at 620 we can calculate that if peak torque was made at red line, peak hp would be 866; so if your reverse the math you can determine that peak torque is made no later than 5000rpm, and that at 7k rpm the engine is making no more than 465 ft/lbs of torque
So what does this tell us? Most likely that the blower is a pretty small unit, and that it is going to have the classic "too small" torque curve. It will come on strong in the low rpm band, peak in the mid range, then taper off at an increasing rate as RPM increases.
01-08-2014, 09:12 AM
#62
Melting Slicks
As the Sport Cup 2 looks a little different.
So I am not so sure anymore.
If they were going to do a more agressive aero package, with a wing, (not that they are) it would be an option on the most track oriented version.
01-08-2014, 09:22 AM
#63
I have heard people speculate that it was going to get the Sport Cup 2s also but the teaser pic clearly shows the regular Sport Cup tread pattern.
As the Sport Cup 2 looks a little different.
So I am not so sure anymore.
If they were going to do a more agressive aero package, with a wing, (not that they are) it would be an option on the most track oriented version.
As the Sport Cup 2 looks a little different.
So I am not so sure anymore.
If they were going to do a more agressive aero package, with a wing, (not that they are) it would be an option on the most track oriented version.
01-08-2014, 09:50 AM
#64
Melting Slicks
Your right, but the 997s really uses the Sport Cup+ or N-spec tire which does have a different tread pattern than the regular Cup or Cup ZP tire. You can clearly see in the teaser pic that it says Pilot Sport Cup (with the little ZP symbol) on the side of the tire, not Sport Cup 2. Now maybe it is not the final production tire?
01-08-2014, 10:24 AM
#65
Your right, but the 997s really uses the Sport Cup+ or N-spec tire which does have a different tread pattern than the regular Cup or Cup ZP tire. You can clearly see in the teaser pic that it says Pilot Sport Cup (with the little ZP symbol) on the side of the tire, not Sport Cup 2. Now maybe it is not the final production tire?
01-08-2014, 11:15 AM
#66
Melting Slicks
01-08-2014, 01:36 PM
#67
Instructor
Actually, he is making a very good mathematical argument (not speculative), base on the numbers. Yes, the numbers may be inaccurate and the reasons for the numbers are due to a small number of possibilities (if accurate), but it's a pretty well-reasoned post, imo.
01-08-2014, 01:43 PM
#68
Wow these numbers will be impressive!! The question is how are they gonna put all this power down to the ground? Let's see what GM is up to?
And, no matter the price (up to a point that is) this car will be an amazing buy just like all Corvette's have been!!
And, no matter the price (up to a point that is) this car will be an amazing buy just like all Corvette's have been!!
01-08-2014, 03:06 PM
#69
Instructor
01-08-2014, 03:23 PM
#70
Team Owner
Will be dam quick!
01-08-2014, 09:39 PM
#71
01-08-2014, 09:43 PM
#72
Safety Car
Your right, but the 997s really uses the Sport Cup+ or N-spec tire which does have a different tread pattern than the regular Cup or Cup ZP tire. You can clearly see in the teaser pic that it says Pilot Sport Cup (with the little ZP symbol) on the side of the tire, not Sport Cup 2. Now maybe it is not the final production tire?
01-08-2014, 11:44 PM
#73
Le Mans Master
Chevy did very good when dumping Goodyear
01-09-2014, 02:36 AM
#74
Racer
Member Since: Nov 2008
Location: Vancouver BC
Posts: 342
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Yes... It does.
When you see numbers like this on a forced induction motor it means that the torque will drop off in the high range; how much depends on the rpm limit.
If we assume 7k rpm redline, and peak torque of 650, and peak HP at 620 we can calculate that if peak torque was made at red line, peak hp would be 866; so if your reverse the math you can determine that peak torque is made no later than 5000rpm, and that at 7k rpm the engine is making no more than 465 ft/lbs of torque
So what does this tell us? Most likely that the blower is a pretty small unit, and that it is going to have the classic "too small" torque curve. It will come on strong in the low rpm band, peak in the mid range, then taper off at an increasing rate as RPM increases.
When you see numbers like this on a forced induction motor it means that the torque will drop off in the high range; how much depends on the rpm limit.
If we assume 7k rpm redline, and peak torque of 650, and peak HP at 620 we can calculate that if peak torque was made at red line, peak hp would be 866; so if your reverse the math you can determine that peak torque is made no later than 5000rpm, and that at 7k rpm the engine is making no more than 465 ft/lbs of torque
So what does this tell us? Most likely that the blower is a pretty small unit, and that it is going to have the classic "too small" torque curve. It will come on strong in the low rpm band, peak in the mid range, then taper off at an increasing rate as RPM increases.
I highly doubt GM would design an engine that way. More likely, we'd see something similar to the ZR1, which drops from a tq peak of 604 to 515 lb-ft at hp peak (638@6500).
If we take the same ratio of tq drop-off and extrapolate it, we get 650lb-ft * 515/604 = 555 lb-ft
For 620hp * 5252 / 555lb-ft = 5869 rpm.
That may be a little optimistic, but real hp peak may be somewhere just above 6000rpm.
01-09-2014, 06:45 AM
#75
Le Mans Master
I have heard people speculate that it was going to get the Sport Cup 2s also but the teaser pic clearly shows the regular Sport Cup tread pattern.
As the Sport Cup 2 looks a little different.
So I am not so sure anymore.
If they were going to do a more agressive aero package, with a wing, (not that they are) it would be an option on the most track oriented version.
As the Sport Cup 2 looks a little different.
So I am not so sure anymore.
If they were going to do a more agressive aero package, with a wing, (not that they are) it would be an option on the most track oriented version.
01-09-2014, 06:48 AM
#76
Le Mans Master
Why do we have to make an artificial redline of 7k? Or was it stated somewhere that I missed?
I highly doubt GM would design an engine that way. More likely, we'd see something similar to the ZR1, which drops from a tq peak of 604 to 515 lb-ft at hp peak (638@6500).
If we take the same ratio of tq drop-off and extrapolate it, we get 650lb-ft * 515/604 = 555 lb-ft
For 620hp * 5252 / 555lb-ft = 5869 rpm.
That may be a little optimistic, but real hp peak may be somewhere just above 6000rpm.
I highly doubt GM would design an engine that way. More likely, we'd see something similar to the ZR1, which drops from a tq peak of 604 to 515 lb-ft at hp peak (638@6500).
If we take the same ratio of tq drop-off and extrapolate it, we get 650lb-ft * 515/604 = 555 lb-ft
For 620hp * 5252 / 555lb-ft = 5869 rpm.
That may be a little optimistic, but real hp peak may be somewhere just above 6000rpm.
01-09-2014, 11:37 AM
#77
Le Mans Master
The Stingray with auto trans are running mid 11s in the qtr, So no doubt with the new C7 Z06 Platform I would think mid 10s in the quarter is very doable with the new auto trans.
01-09-2014, 12:50 PM
#78
Racer
Member Since: Nov 2008
Location: Vancouver BC
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An engine with 650tq and 620hp revving to 7k rpm would be a poor design - the blower is too small to keep up at high rpm.
With any production engine that revs to 7k, be it an LS7, 4cyl Honda, or GT500, the torque would be lower, or at the most, even with hp.