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Old 05-02-2013, 10:45 PM   #18
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Old 05-02-2013, 11:41 PM   #19
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I totally get the gearing taking mph off the top but if these #'s are accurate I don't quite understand the 0-60 time @ 4.2. It just seems to me that if I throw a 3:91 gear in the car, take 300 pounds off her, and have the hp/torque #'s we have been told that it should be sub 4. I know you don't time a road course car from a dead stop so I get it is irrelevant for the purpose of the car but I just find that a bit odd. I am not slamming the car, especially since this is all speculation it just seems to not add up to me.
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Old 05-03-2013, 08:08 AM   #20
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I totally get the gearing taking mph off the top but if these #'s are accurate I don't quite understand the 0-60 time @ 4.2. It just seems to me that if I throw a 3:91 gear in the car, take 300 pounds off her, and have the hp/torque #'s we have been told that it should be sub 4. I know you don't time a road course car from a dead stop so I get it is irrelevant for the purpose of the car but I just find that a bit odd. I am not slamming the car, especially since this is all speculation it just seems to not add up to me.
500hp and 317 lb-ft crank hp/tq will break traction of 325/30-19" Trofeos while rolling in 1st gear at 10-15mph on a 911. Therefore it makes perfect sense to me that a car with smaller tires, front weight bias, and ~183 more lb-ft tq simply can't put down the power through 305's for a shocking 0-60 time.

And...if it has the close ratio gearbox, it likely needs a shift before 60 mph which will make the 0-60 time longer.

We have no idea if this speculated information is correct, and if it is, I just don't care. It doesn't matter for those of us who will use the car for its intended purpose.
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Old 05-03-2013, 08:13 AM   #21
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You guys just need a little more patience with us uneducated/easily confused types....lol....
Why don't you invest in a driving school? The Spring Mountain Ron Fellows/Corvette school would be great?

Here you go: http://www.springmountainmotorsports...riving-schools

The skills learned will last a lifetime and you don't have to feel left out of the conversation on here.
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Old 05-03-2013, 10:27 AM   #22
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Hopefully this will help put to rest the guesses that the Z/28 will cost less than the ZL1 that I see in almost every other thread.
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Old 05-03-2013, 11:07 AM   #23
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According to GM/Media specifications, the gearbox ratios for the 2014 Z-28 and the 2013 1LE are identical, apparently they are going to use the same TR6060. Also, the first four gear ratios are identical for the ZL1, Z-28, and 1LE, the only difference is gears 5 and 6, with the Z-28/1LE having .74 for 5th, and .50 for 6th, with the ZL1 having .80 for 5th, and .63 for 6th.
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Old 05-03-2013, 12:15 PM   #24
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According to GM/Media specifications, the gearbox ratios for the 2014 Z-28 and the 2013 1LE are identical, apparently they are going to use the same TR6060. Also, the first four gear ratios are identical for the ZL1, Z-28, and 1LE, the only difference is gears 5 and 6, with the Z-28/1LE having .74 for 5th, and .50 for 6th, with the ZL1 having .80 for 5th, and .63 for 6th.

Is the final drive gearing known for the Z/28? Sorry if I missed that.
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Old 05-03-2013, 12:22 PM   #25
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Is the final drive gearing known for the Z/28? Sorry if I missed that.
3.91, same as 1LE
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Old 05-03-2013, 12:35 PM   #26
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Why don't you invest in a driving school? The Spring Mountain Ron Fellows/Corvette school would be great?

Here you go: http://www.springmountainmotorsports...riving-schools

The skills learned will last a lifetime and you don't have to feel left out of the conversation on here.
Actually, now that you mention it, Porsche is building a new facility in the City of Carson here in SoCal...Not sure what all the details are, so far it's like a driving skills facility for new Porsche owners and what-not...Not sure if it will have any offerings for the general public yet....It's under construction now...May look there in the not too distant future...
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Old 05-03-2013, 12:43 PM   #27
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^, yes thats correct....3.91 rear axle gear ratio, and with 19'' square tire set-up over the 3.73 rear axle gear ratio<standard trans> and 20" tires on the ZL1, with lower fifth and sixth gear's, it's going to be much more of a gear jammer and selective in keeping in the power band for the layout at hand. It's going to be a shifting, high winding wheel mans car for sure...
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Old 05-03-2013, 12:57 PM   #28
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FWIW I was playing with my EFI live and recorded a 0-60 time of 4.2 with my cam headers and intake on my 11SS, and I'm far from skilled when it comes to launching. I would think the lighter Z28 would have no problem matching it with bigger tires and lighter weight.

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Old 05-03-2013, 01:21 PM   #29
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Originally Posted by carman II View Post
3.91, same as 1LE
Thanks!

Quote:
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Actually, now that you mention it, Porsche is building a new facility in the City of Carson here in SoCal...Not sure what all the details are, so far it's like a driving skills facility for new Porsche owners and what-not...Not sure if it will have any offerings for the general public yet....It's under construction now...May look there in the not too distant future...
Porsche Sport Driving School in Leeds Alabama is superb, I would recommend it to anyone seeking to learn high-performance driving skills. I've yet to hear if the new SoCal facility will be available to non-Porsche owners (PSDS welcomes everyone), but I would think that it would.
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Old 05-03-2013, 02:04 PM   #30
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This IS "Over" 500/500

POWER-TESTING THE FINAL PRODUCT
Livernois Motorsports is experienced at building all kinds of LS engines for street
and racing applications. The company likes the LS7 as a wet-sump engine
because it makes just as much power throughout the rpm band as the stock
dret-sump, installs anywhere a normal LS V-8 engine would go, and has incredible
street cred. The wet-sump LS7 is not for customers wanting a track-ready Pro
Touring car—in that case, the dry-sump version of the LS7 is ideal.
Note: Power numbers are all corrected using correctionf factor SAE J607 (29.92
Hg, 60 degrees F, dry air) and testing was performed with the GM Performance
Parts controller (GM PN 19166567) handling fuel and ignition.
ENGINE SPEED DRY-SUMP WET-SUMP
RPM LB-FT HP LB-FT HP
2,800 438.5 233.8 439.3 234.2
2,900 434.9 240.1 437.9 241.8
3,000 431.4 246.4 438.1 250.3
3,100 437.2 258.0 441.8 260.8
3,200 444.0 270.5 447.9 272.9
3,300 450.1 282.8 454.0 285.3
3,400 452.0 292.6 456.6 295.6
3,500 454.6 302.9 457.8 305.1
3,600 457.0 313.3 460.5 315.6
3,700 464.3 327.1 468.8 330.2
3,800 469.6 339.7 473.1 342.3
3,900 475.2 352.9 483.0 358.6
4,000 480.6 366.0 486.6 370.6
4,100 490.5 382.9 490.3 382.7
4,200 493.4 394.6 498.5 398.7
4,300 495.0 405.3 499.7 409.1
4,400 502.0 421.0 506.9 424.6
4,500 506.6 434.1 508.0 435.3
4,600 509.7 446.4 514.8 450.9
4,700 513.5 459.5 519.5 464.9
4,800 511.5 467.5 518.0 473.4
4,900 514.7 480.2 520.6 485.7
5,000 514.3 489.6 515.5 490.8
5,100 513.8 499.0 520.6 505.0
5,200 510.1 505.1 514.5 509.4
5,300 511.9 516.6 509.0 513.6
5,400 505.2 519.5 508.6 522.9
5,500 506.9 530.8 508.6 532.7
5,600 504.4 537.8 508.7 537.0
5,700 497.9 540.4 501.3 544.0
5,800 493.9 545.5 493.2 544.7
5,900 487.3 547.5 483.6 543.2
6,000 481.3 549.8 485.3 554.4
6,100 477.9 555.0 473.8 550.3
6,200 465.7 549.8 467.3 551.7
6,300 461.8 554.0 460.8 552.7
6,400 450.7 549.3 453.6 552.7
6,500 443.1 548.4 444.0 549.5
6,600 435.1 546.8 435.1 546.8
6,700 426.0 543.5 425.3 542.6
6,800 417.0 539.8 417.8 541.0
6,900 403.8 530.5 407.7 535.6
7,000 395.8 527.5 404.3 538.9
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Old 05-03-2013, 02:07 PM   #31
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^...I particularily liked the part......"has incredible street cred"....
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Old 05-03-2013, 02:09 PM   #32
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^...I particularily liked the part......"has incredible street/Track cred"....
I fixed it!
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Old 05-03-2013, 08:30 PM   #33
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Re: patience. Nowhere else on this forum will you find a more patient bunch the the ZEE-lievers...

Re: gearing. Speeds in gears for the Z/28 and the 1LE should be close to the same. The ZEE has more revs, but shorter tires.
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Old 05-04-2013, 07:35 PM   #34
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Base starts@ $63K. June issue of Motortrends
That will be a good price to come in at, but i think 10K more or 20K more is likely the rear price, will know more soon.
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