: New road and track article: They love Caddy's?



ctsvett
01-19-05, 08:57 PM
Dont know if this has already been covered, but Road and Track has a great article on the V-series (STS and XLR included)

Article is scanned here (large files: ~100-200 k each page):

http://www.cadillacfaq.com/faq/answers/reviews/randtrack/index.html

Reed
http://www.cadillacfaq.com

Redline
01-19-05, 10:54 PM
Picked up tonight -- reading on a plane tomorrow. Interesting points: they run the STS-V a little quicker in this 1/4 mile than the CTS-V (in this particular test), and the XLR-V, with 40 more hp than the C6, is significantly slower... Sandbagging some numbers to appease the Bowtie?

Bottom line -- if you want to shift yourself with 400+ hp, there is still only one real way to go...

Vrocks
01-19-05, 11:34 PM
Picked up tonight -- reading on a plane tomorrow. Interesting points: they run the STS-V a little quicker in this 1/4 mile than the CTS-V (in this particular test), and the XLR-V, with 40 more hp than the C6, is significantly slower... Sandbagging some numbers to appease the Bowtie?

Bottom line -- if you want to shift yourself with 400+ hp, there is still only one real way to go...

Power to weight Ratio's for V series Cadillacs:

CTS-V: 3,730/400 = 9.36lb/hp
STS-V: 4,105/440 = 9.33lb/hp
XLR-V: 3,845/440* = 8.74lb/hp*

* The XLR-V's weight was estimated from the avg. difference of the previous V model weights compared to the regular version. The HP is assumed to be the same as the STS-V's HP rating of 440hp.
[((STS-V-STS) + (CTS-V-CTS))/2 = +175lbs for XLR-V]

Corvette C6 Convertible: 3,199/400 = 8.00lb/hp

The next important thing to consider is the gearing in each car, along with where it makes max power, and its torque curve.:

The following information was found @: http://www.engine-power.com/

Standard XLR: [The XLR-V will probably mirror the STS-V]
320hp @ 6,400rpm, 310lb-ft @ 4,400rpm
Gear Ratios:
5-Speed Automatic w/ OverDrive
1st 3.45:1
2nd 2.21:1
3rd 1.60:1
4th 1.00:1
5th 0.76:1
Final Drive Ratio = 2.93
Reverse 3.02:1

STS-V [The XLR-V will probably have very similar gearing]
440hp @ 6,400rpm, 430lb-ft @ 3,600rpm
Gear Ratios:
6-Speed Automatic with OverDrive
1st 4.02:1
2nd 2.36:1
3rd 1.53:1
4th 1.15:1
5th 0.85:1
6th 0.67:1
Final Drive Ratio 3.23:1
Reverse 3.06:1

CTS-V
400hp @ 6,000rpm, 395lb-ft @ 4,800rpm
Gear Ratios:
1st 2.97:1
2nd 2.07:1
3rd 1.43:1
4th 1.00:1
5th 0.84:1
6th 0.56:1
Reverse 3.28:1
Final Drive Ratio: 3.73:1

It looks like we should lose to the STS-V and XLR-V in a drag race for a few reasons. They have better power to weight ratios, they make their power more quickly and the 6spd autos will launch them off the line. I wonder how efficient the new drivetrains are regarding parasitic loss.

The Corvette technically speaking should beat all of us if it has the 3.42 rear end or the 3.15 with a 6spd. We also need to remember that the SC N* could be under rated from the factory, this seems to be the popular thing to do amongst car manufacturers...