Cant handle it, huh?

Darn that slow 720s. Here are a few in real world Arizona +5600DA, +5900DA...you know, about the crappiest air you can find...not this mine shaft Atco stuff at -1000DA...Yeah she’s kinda slow on street tires and an unprepared surface and all...What was the C8 60-130 again? 11 seconds. I guess that would make 5.5s 60-130 in 5600DA ‘really’ slow.

BTW...can you see the yellow line for ‘acceleration’ in the 10.16s run with a 5600DA, ...Yup...that’s what it ran ‘letting off’ the throttle. Slow as fack...That 2.84s 0-60 was with no roll out...with the roll out it was 2.59...

 

Yep and I'm betting that because dragy just proved that there are a multitude liars about the C8's performance that come Monday morning the phones will be ringing off the hook at the local Chevrolet dealers with people cancelling their order instead of buying a piece of crap C8.

Some of the anti C8 obsessions are just beyond ridiculous. ............finding any little thing to cry about........I didn't know the car was such a POS until I read about it in a Corvette fan forum site. All this b****ing and moaning over a couple lousy hundredths of a second. People are dying all over the world and all some of you give a crap about is what dragy says. Personally I think some priorities need greatly adjusting.

 

You simply don’t get it. True car enthusiasts just want accurate numbers is all. No one wants the emperors new clothes.

I think the vast majority of people, including myself, believe GM’s published numbers of 2.8 or 2.9s with the 1ft rollout. What we don’t believe are the PDR showing 2.6s with two people in it, in several of the runs. That’s not hate...nope, just simply looking for a 3rd party to verify...that’s what a vbox and dragy are for. Which have both proven, when compared to real track data to be extremely accurate, if anything even more conservative than track times. So far, the PDR is not stacking up well against the dragy with regard to those 2.6s times.

Not hate...we just live in the real world and want accurate data. Not some fanboy club data. I think most people would love to see the dragy or vbox pull a 2.6s. But we know it’s not likely...Given the cars spec and compared to every other cars that can actually pull a real 2.6s time.

The C8Z06 will be the car to have...GM did a great job with the C8, especially for the money. But...don’t they always?? Pretty much...Corvette is always a fantastic performance bargain. So go away with the ‘hater comments.’

 

Nobody's lying. Most people interested in the numbers know that timings at the drag strip have rollout. Car & Driver simulates the dragstrip time with its V-Box using a 3MPH roll.

C&D says this;
"Before you take out your car to try to equal our times, remember that our results are adjusted for weather conditions [see "Correcting for Weather"]. We also average the best runs in two directions to cancel out the effects of wind, and we use a 3-mph rollout. And of course there is car-to-car variability."

Edmund says this

V-Box testing

"The term "rollout" might not be familiar, but it comes from the drag strip. The arrangement of the timing beams for drag racing can be confusing, primarily because the 7-inch separation between the "pre-stage" and "stage" beams is not the source of rollout. The pre-stage beam, which has no effect on timing, is only there to help drivers creep up to the starting position. Rollout comes from the 1-foot separation (11.5 inches, actually) between the point where the leading edge of a front tire "rolls in" to the final staging beam — triggering the countdown to the green light that starts the race — and the point where the trailing edge of that tire "rolls out" of that same beam, the triggering event that starts the clock. A driver skilled at "shallow staging" can therefore get almost a free foot of untimed acceleration before the clock officially starts, effectively achieving a rolling-start velocity of 3-5 mph and shaving the 0.3 second it typically takes to cover that distance off his elapsed time (ET) in the process."

 

how come no one posts their Camry's 0-60 times?

 

Lol. I love the 40 threads on the same subject of .1-.5 sec difference. Wind, temp alt can make the difference. This will never end. I can't wait for the Z06 C8 so we can do it all over again. Haha

 

No, I get it and I am a true car enthusiast, and my next car will be a C8Z. However, I also get some of you are literally picking this car to pieces. You're wanting absolutes and there are minimal absolutes and a greater amount of variables. Who says that dragy is the 'God' of all the instruments? We've all known for years the PDR isn't really that close. My 10.4 C7Z runs (on the strip timer) were 10.6 on the PDR. The same for my current car, my 9.9's show up as a 10.2 on the Dodge SRT timers.

Bottom line is I'm getting sick and tired of the same posters picking the C8 to death. Oh, this level road crap, I've been here done that when people were picking the C7 Z51 to death.


*

 

lol... when was the last time the engineer of the Camry stood on a podium and shouted to thousands of people in attendance and millions watching that they're "seeing less than 3 seconds to 60mph"?

It's all relative.

Change it from zero to 60 and make it mpg.... nobody cares about Corvette's mpgs but you better believe we are all over the performance figures. Down to the hundredths and .xx of a mph. That's probably the biggest difference between those who purchase a base car v a Z51 car v a Z06 or above (when finances are removed from the equation).

Some dont care. Others do. It's that simple same as sports. Are there certain outcomes that have an * ? Yep. As there are here.

Someone at atco this november may run in negative 2800ft and pull off a 10.8 @125mph bone stock. That will be the benchmark of all C8s from there on out.. why? Because the "average joe" has no concept of DA or tracks at sea level vs a mile high track.

And it's the same as when we see C8s that will only pull 12.0s at 115 in high altitude...

but if you notice... the only thing reflected on will be the "positive" et/mph.. that's a fanboy. We all are for certain things.

All that said? We still haven't observed what a dragy says on those 2.5 2.6 2.7 runs. Only a pdr at 2.95 and a dash timer at 2.8 which on the end equaled an almost .2 difference and without a rollout was .5 to only 60mph.

I for one am more interested now in all the usual roadcourses throughout the US vs a C7 Z51 and a GS as well as a C6 Z06/ZR and all other competitors..

 

Thanks for saving me the time to type that out. Well said and right on the money. I'll take truth and reality all day long, even if it's not exactly what I wish it was.

 

Is that with two passengers and a full tank of gas though like the base C8's 2.6 pass? 😂

That 60-130 is insane for a stock car!!

 

Accuracy of the Dragy. This is from a trip I took to Texas Motorplex in September of 2019 in my C4 LS swap car.


Beam height at the drag strip explains the differences in the short times as the dragy doesn't know how long the nose of your car is. At a drag strip, you break the beams on the starting line with your tire and trip the 60' beam which is 10" high with the nose of the car. Effectively shortening the 60' up to a few feet depending on the vehicle. The Dragy just can't account for that discrepancy. However 0 to whatever runs, it is very easy for the dragy to see when the vehicle initially moved and when the certain speed was achieved.

The dragy is a GPS+GLONASS device. It is very accurate and is connected to quite a few satellites at once and uses an algorithm to quickly verify the run between the various satellite datas.

The dragy has evolved a bit since it was first released. They were having +1-2 mph difference for the 1/8 and 1/4 mile traps when they first released it. They were giving actual speed at the line and not average over the last 66'. Now it has been updated to NHRA rules and the most difference I have seen between my slips is about 0.1-0.2 mph.

On this trip I was talking to a track tech who was also racing and noticed the dragy on my dash. He literally believes that a dragy or Vbox is more accurate as far as e.t and traps than the track because the track timing systems have false trips all the time. Bugs, debris, whatever... can't trip up the dragy.

 

My daily a BMW X2

 

720 can run. 5.5 seconds from 60-130 is moving on out.

 

I don’t see wind making much of a difference in 0-60 unless you’re racing during a hurricane and from 40-100* temperature isn’t going to make a half second difference in 0-60...now over a 1/4 mile yes.

 

Got a simple question for everybody chiming in on the accuracy of a draggy, PDR, and Dragstrip timing slip.

Why are you wasting your time worrying about something that you can’t even tell yourself is different.

Anybody that’s been around and done dragracing knows that some tracks read faster than others and no we’re not talking about DA

How many times have you ran your car down the track and think you’re off to a great run to pick up the slip and realize it was actually slower than the past before.

How many times have you seen people say oh that launch felt great to realize it was a 10th or two slower.

Most drag racers only care about 60 foot just to see if there’s anything left in the ET and how well a car hooked.

For a streetcar experience, the most important thing will be your MPH. Anybody here commenting on the McLaren 720S acceleration from 60 to 120 knows what I’m talking about. Who cares what does C8 does 0 to 60 I mean come on really?

nobody here could even tell the difference between what a PDR dragon even says.

What you can feel is that the car on only traps 118 maybe 120. My C5 Z06 did that stock almost 20 years ago with 405 measly HP. I can tell you right now the driving experience won’t be much different other than from a red light standstill. Nobody goes around spinning out from the stop anymore enough!

Stop wasting your time arguing over a few tenths on 0-60. Who cares? Focus on getting a car that goes 60 to 130 in 5-6 seconds you’ll be better served.

 

Same car/same track with actual ETs within a tenth of PDR which appears consistent on 1/4 mile though one of the 0-60/0-100 runs is .25 faster yet there’s no change in the 1/4 and this is on a prepped track with launch control and no spinning...I’d call that run a fluke

 

The truth can be a bitter pill but tastes better than BS.

GM should have made that inbuilt timer read half of what it does and let a 20ft roll out. Then claim 0-60 in 1.2. If it reads that on the dash it must be true. You would be on here waving your hands look I got a 1.2 on the timer, it must be true.

Accurate figures is what most are after, not some BS numbers that look good. Hard to understand for you.


​​​​​​​Dragy is pretty darn accurate judging by that.
​​​​​

 

Absolutely, no doubt about it. GM, car magazines, independent testers, private owners who post their results are ALL LYING! Artfully orchestrated campaign of falsification involving hundreds of individuals who are hell bent on deceiving the world of performance enthusiasts about the C8. So nice of a couple experts here to set us simple folk straight on all this. LOL!

 

I don’t think anyone is suggesting that the people getting 2.6s PDR times are ‘lying.’ I might be wrong but I don’t think any magazine has tested it better than 2.8s. GM claimed a 2.8 or 2.9...I don’t remember exactly...and I don’t think people are saying they are lying.

It’s more about trying to get accurate data. I don’t see too many people arguing or crying foul over the 2.8-3.0 times. Where the issue is coming from are the 2.6-2.7s times. If I ran a 2.3s time in the 720s from the recorder...I wouldn’t go post it all over the internet...I’d pull out the dragy or go to the track and see what the real deal is because that would be far enough outside the norm to question it.

So far...whether people like it for not...There hasn’t been a single 3rd party verification from a magazine, dragy, vbox or otherwise to show a 2.6s time on the C8...yet the PDR keeps popping them out. That’s what people are taking issue with.

It’s not about hate...it’s just about trying to be accurate. I don’t see very many people hating on the C8..,quite the opposite, IMHO. GM knocked it out of the park.

 

It isn't perfect but it is really reliable within a hundredth or two if the car is properly staged at the track. I have a couple more slips with the same accuracy.
I did have one anomalous slip that was about 7 one hundredths off. It so happens that I accidentally deep staged on that run so with the track timing system I had less rollout. The trap speeds were in spec.