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With the ability to make parts to such tight tolerances nowadays and also the fact that rings take a little while (and some good cylinder pressure) to fully seat these newer engines can pick up substantial HP after break in. I've seen modern engines pick up as much as 10 WHP from simply breaking in (after 1000-2000 miles), all the parts wear into together a little initially and you get a tad more compression from rings seating and every little bit helps. Many new engine ECU's have fuel trims that are based on driving preference and history and those can take a little while to come in as well.
Do you guys always run your cars with the same amount of fuel in the tank? Bought from the same station?
Never thought of that.......same gas station. But I see what you are saying....93 octane may not be the same 93 octane a different gas stations.
Never thought of that.......same gas station. But I see what you are saying....93 octane may not be the same 93 octane a different gas stations.
One of my best friends is a district manager for 11 Shell gas stations back home in Ohio, he knows a lot about how locally owned gas stations operate and I can tell you with 100% certainty that not all "93 octane" is 93 octane. The reality is that most cars get by fine on anything 87+, so some stations are much more lax than others about what goes in their underground tanks. I know for a fact that if they buy too much 87 and the underground tank is full they put it in the other tanks, which dillutes the 91 or 93 tanks. Of course not all of them are shady, but it's just like anything else you want to find one or some you can trust and stick with them. With the stingray at 11.5:1 the octane can certainly make a difference.
It's also not just the octane you have to watch out for at stations, the condition of the tanks and the amount of condensation can change things. How often they change their filters to keep crud from getting into the fuel etc can all make a difference.
As a side note about cars running fine on 87 another friend of mine who works at a dealership told me that when they fill a car up for someone who just bought a new car it gets 87. Always. No matter what. Doesn't matter if it's a turbo car that says "93 only" right on the gas door, they fill it with 87. Never had a problem. Of course that's not smart and long term use could certainly lead to problems but trust me when I tell you that gas stations and other companies are more concerned about making money than they are about your 1/4 mile times.
I'm not sure how accurate this is, however I've been told before to never buy at local mom and pop gas stations, you know those stations with about 4 pumps, but to buy from larger stations that service many cars a day.
Also, I'm a very careful driver on the street. I work for a major company in the Houston area and I have a company truck issued to me. This being said, I drive very carefully, never hot rod or race the car. If I go past 4,000 rpms in any given week, that would be highly unusual. Does this car have some sort of 'memory' that the computer kind of sets itself up by the average daily driving? I remember when racing my 2005 GTO at the track, I was told by one racer who knows his stuff, to remove one of the fuses at the track for around 30 seconds, as it would reset some sort of 'memory'.
Cars that run really good on the back half do not double their 60' at the end, my 2012 coyote was a good example, whatever I picked up to 60 was all I got. My older cars would double the 60' gains religiously but I wouldn't count on that unless you actually see that particular car do it.
Not to say that car isn't fast, it was a very nice run. Did anyone else notice that it short shifted first? I wonder if that is a matter of the telemetry not keeping up with the engine or if it actually shifts out of first earlier.
Also if your indicated 1/4 mile time was that far off then your 0-60 was probably better than shown too, which is awesome.
Originally Posted by Fore58
What was really strange is that your 95mph 1/8 mile will actually put your car around 120 trap speed. My car probably had the lowest trap speed of 116 my first time out with 1500 miles on it with a 92.78 1/8 mile and still managed 11.94. But when I reached around 5000 miles things changed strangely. How about 91.81 1/8 mile 11.93@117.57. Evidently my car started picking up on the back half instead of 1/8 mile with the rest of my runs. Having said that, it appears that you may see a change in performance with break-in or additional miles on your car. So "10mm" actually has a point. And I am still trying to figure that out.
Great points, I also noticed he had a great 1/8th trap and then it did not back half as well.
I also think the typical 0,1 60' to 0.2 1/4 conversion does not apply to these new C7s.
Year of the C7: 2015
Tires used on the pass:Stock Z51 tires
Performance Mods (if any):None, car is Z51 with 8 speed auto, NPP
Category submitted for:Bone stock on stock tires
60'.............1.992
330'...........5.180
660'...........7.776
660’ mph...95.30
1000'..........10.016
1320'..........11.919
1320’ mph…117.89
Name of the track:Royal Purple
Date of pass:2/27/15
Weather conditions: (include Density Altitude, if known):around -1160
Yes, this is the video from this run, and I'm pretty disappointed at the amount of inaccuracy on the video.
I'm not sure how accurate this is, however I've been told before to never buy at local mom and pop gas stations, you know those stations with about 4 pumps, but to buy from larger stations that service many cars a day.
Also, I'm a very careful driver on the street. I work for a major company in the Houston area and I have a company truck issued to me. This being said, I drive very carefully, never hot rod or race the car. If I go past 4,000 rpms in any given week, that would be highly unusual. Does this car have some sort of 'memory' that the computer kind of sets itself up by the average daily driving? I remember when racing my 2005 GTO at the track, I was told by one racer who knows his stuff, to remove one of the fuses at the track for around 30 seconds, as it would reset some sort of 'memory'.
You were resetting the long term fuel trims, which if positive were adding extra fuel at wide open throttle meaning it'd be running richer so making less power.
Great points, I also noticed he had a great 1/8th trap and then it did not back half as well.
I also think the typical 0,1 60' to 0.2 1/4 conversion does not apply to these new C7s.
I agree that rule doesn't apply in the realm of 10/11 sec cars, IMO it's more like .1 to .15 ratio in 60' to ET. Just like the 10hp=.1 of a second or 100lbs a tenth gain isn't applicable either as the power to weight ratio isn't the same as a 13 sec car, where many of these rules of thumb came from.
I picked my car up last Thursday, I have about 200 miles on it. Once I get the 500 mile oil change done I will be at the track trying to lay it down.
I wonder if the Z51 tires hook better than base tires? They sure are good at throwing ****ing rocks around
I always thought it was a marketing ploy, but maybe not.
My non-z51 tires aren't too bad with rocks, or maybe I just drive on smooth roads? The weather has been so bad I only get to drive it once a week if I am lucky.
I always thought it was a marketing ploy, but maybe not.
My non-z51 tires aren't too bad with rocks, or maybe I just drive on smooth roads? The weather has been so bad I only get to drive it once a week if I am lucky.
I wonder if we can actually look up the compound they used in each tire? My "Treadwear" rating is 300, what is yours?
You ever make a pass on slicks or drag radials and look at your tires after you come down the return road? How they're all covered in small gravel from being sticky and picking up rocks? My tires do that all the time, which kinda blew my mind I didn't think they would put tires that aggressive on a factory street car.
I wonder if we can actually look up the compound they used in each tire? My "Treadwear" rating is 300, what is yours?
You ever make a pass on slicks or drag radials and look at your tires after you come down the return road? How they're all covered in small gravel from being sticky and picking up rocks? My tires do that all the time, which kinda blew my mind I didn't think they would put tires that aggressive on a factory street car.
Dont now if it is true but my dealer rep told me the base vette tires are the exact same tire (MPSS) as the Z51, only difference is the base tire is smaller.
Dont now if it is true but my dealer rep told me the base vette tires are the exact same tire (MPSS) as the Z51, only difference is the base tire is smaller.
I read recently that the only real difference is like the angles of the steel belts or something, nothing significant enough to make a 60' difference I don't think.
NEW Z06 8spd 1lz
Setting up a match race at Richmond Dragway in April. Best 2 out of 3. Will most likely be the C7's last outing at the Dragstrip. Zack Culbertson (great driver) will drive the C7, I will be driving the New Z06. Matt Eastwood who has helped us set the previous times will Video & try to keep me patient and not smoke the 20's on the Z. 250 miles on it so far and it feels like a Beast!! Does anyone know if Snorman has a new Z06 yet??
NEW Z06 8spd 1lz
Setting up a match race at Richmond Dragway in April. Best 2 out of 3. Will most likely be the C7's last outing at the Dragstrip. Zack Culbertson (great driver) will drive the C7, I will be driving the New Z06. Matt Eastwood who has helped us set the previous times will Video & try to keep me patient and not smoke the 20's on the Z. 250 miles on it so far and it feels like a Beast!! Does anyone know if Snorman has a new Z06 yet??
Beautiful car!
If you can run 11.3 in a C7 A6, I can't wait to see how you run in the Z
Yes Snorman has his Z, already posted up a 0-150 vid
NEW Z06 8spd 1lz
Setting up a match race at Richmond Dragway in April. Best 2 out of 3. Will most likely be the C7's last outing at the Dragstrip. Zack Culbertson (great driver) will drive the C7, I will be driving the New Z06. Matt Eastwood who has helped us set the previous times will Video & try to keep me patient and not smoke the 20's on the Z. 250 miles on it so far and it feels like a Beast!! Does anyone know if Snorman has a new Z06 yet??
NEW Z06 8spd 1lz
Setting up a match race at Richmond Dragway in April. Best 2 out of 3. Will most likely be the C7's last outing at the Dragstrip. Zack Culbertson (great driver) will drive the C7, I will be driving the New Z06. Matt Eastwood who has helped us set the previous times will Video & try to keep me patient and not smoke the 20's on the Z. 250 miles on it so far and it feels like a Beast!! Does anyone know if Snorman has a new Z06 yet??
