BlacMambaGSVette13

Good 1/4 time for a stock 2013 grand sport

Vette_DD

Stock times by forum members.

Vetteman Jack

Moved to C6 General.

JeremyAZ

buckmeister2

In various magazine tests of the '10-'12 GS, trained professional drivers mostly managed 12.6 or so, with one recording a 12.4.

Now, if you think you are that good, you might get mid-12's. Personally, I think you would do well first time out with a 13.0, and deliriously happy with 12.8. Maybe after 8 or 10 runs, you can go lower, and that would be something to shoot for.

Oh Boy

Not according to these guys. http://www.superchevy.com/features/g...2-grand-sport/

Adam Cifonelli

Its all about the tires.. without going to DRs. Ditch the OEM RUnFlats and pick up some Conti's or Mich and you can prob run low 12s stock.

buckmeister2

I hate to break it to you, but if you are reading Super Chevy, and believing it, you are already in fairytale land.

They state that the 2012 GS they had in for tests dyno'd--I can hardly type this without laughing--415 HP at the rear wheels. Yet, their stud driver only achieved 12.94 in the quarter, blaming a bad track--I am laughing again. Lastly, they say their "sister publication" has achieved a 12.2. Goody...let's see the vehicle. Super Chevy is Super-known for "Super-prepping" cars before any test.

Super Chevy does not sell magazines to lovers of Ford, Chrysler, or import products. They sell to CHEVY GUYS. So, it has been, and always will be, in their own best interest to make Chevy's look as good as they possibly can, no matter what they have to do or say. Do you recall their archived story titled something like, "Junkyard Dog: The $300 small block that dyno'd 425 HP". Lotta folks believed that story, too, but I never heard of anyone who could duplicate it.

Besides, Boy, the OP did not ask what others had achieved. He asked what HE could expect. I used some known data to give him an idea of what HE could expect. I would still be satisfied with a 13.0 on the first time out, and really stoked with a 12.8.

No harm in having a disagreement, though.

Oh Boy

I only put a link to a article I read, nothing more.

buckmeister2

And I absolutely understand that.

I am eager to see what the OP runs his first time out. I hope to run mine in the next couple months, though it will likely be rippin' hot here in Vegas.

Patsgarage

FWIW, in my 13 GS 6MN I ran a 12.9 on the stock GY RFTs, after switching to Continentals my best is a 12.6 @ 117. My 60 ft times are garbage (2.2), as I do not launch the car very hard.

HOXXOH

Stock times are all about the DA and driver. IIRC the 12.319 by grandsportman was something around a negative 1500' DA. It'd been a 12.5 in 0 DA.
You might get negative in Phoenix (1147'), but you can't get negative at Tucson (3075') without having ice on the track.

As a rough guide, add the track elevation times 1% for every 100' of elevation and 65' for every 1 degree difference from 59 F. to get the DA. Also, the rough guide for 1/4 mi times are one tenth for every 600-800' of DA.

So a 13.00 time at a 2000' track at 79 F would be equivalent to a 12.48 at sea level.

DA
2000' x 1.2 = 2400'.
79 F - 59 F = 20.
20 x 65' = 1300'.
2400' + 1300' = 3700' DA

ET
3700' / 700' = 5.28
5.28 x .1sec = .528sec
13.00 sec - .528 sec = 12.48sec

Although this calculation doesn't consider BP or humidity, it'll still get you in a ballpark number that'll give you a comparison to previous times and/or other tracks.

Corvette_Ed

Where does the 700 come from in this calculation? Trying to figure out the ET for a 1818.6 DA.

Not So Fast

Plus Buckster I hear its very crowded, be lucky to get 2- maybe 3 runs in a whole night.
But whatever, I'm subscribed so do it please Did you do headers, I thought I saw you were doing it ??
NSF

HOXXOH

The 700 is the average of the 600-800 DA I mentioned at the end of paragraph 2. The 600 is a number that better suits highly modified NA cars, while 800 is more toward stock ones. You might consider that most Vettes are closer to the middle. This doesn't work the same for power adders, since the power is not as constant or predictable.

CSTYLE

http://www.motortrend.com/cars/chevr...nd-sport-test/

Corvette_Ed

So if my math is correct, that would make my 1818.6 DA the equivalent of .2598 seconds. Nice.

HOXXOH

DA is Density Altitude. It's the equivalent of standard temperature (59 F)at standard sea level pressure (29.92) with no humidity (0) and adjusted for the physical elevation normally expressed in feet. There is no time involved.

You use DA to adjust how your car would have run if it was done under the standard conditions.