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Finally PDR data vs Dragy data

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Old 05-03-2020, 09:56 PM
  #41  
PRE-Z06
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Originally Posted by ZoratZ06
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.
Exactly, we’ll said. GMs claim was 2.9 for the Z51 and 3.0 for the base model, 1/4 for Z51 of 11.2@121 and 11.2@123 for the base model as the gearing is offset by the aero drag over a 1/4 mile. Those numbers are within a tenth of what magazines (corrected) and individuals have reported on a drag strip, but the dash timer and occasionally PDR are what’s not in touch with reality in my humble opinion. I suppose some owner’s feel better about seeing a faster number pop up, but if it’s not accurate does that mean you enjoy being lied to? It’s like the people who wanted to believe the SAE certified C8 was grossly underrated because of the dyno numbers Motor Trend initially published.
https://media.chevrolet.com/media/us...-corvette.html
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Old 05-04-2020, 12:52 PM
  #42  
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Originally Posted by punky
OK then, we are all clear on this now.
We then know that GM is lying, C8 PDRs are lying, C&D is lying, MT is lying along with anyone else who records less than a 3.3. Gotcha! So good to know how things really are and how many liars there are in the performance world.
You're really taking this personally for some reason.
Why are you such an opponent to some additional accuracy?
People could also use the VBox or Performance Box as an alternative to the Dragy.
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Old 05-04-2020, 12:57 PM
  #43  
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Originally Posted by OLD_GOAT
We've all known for years the PDR isn't really that close.
Quoted for posterity.
And no one is picking the car to death, many just want a more accurate measure of said performance.
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Old 05-04-2020, 01:02 PM
  #44  
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Originally Posted by randyn
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.
Very simple explanation.
Because people are posting up hero PDR runs under questionable circumstances with zero independent verification.
It's just a discussion, really.
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Old 05-04-2020, 03:20 PM
  #45  
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Originally Posted by vrybad
Quoted for posterity.
And no one is picking the car to death, many just want a more accurate measure of said performance.
Here is some more for your posterity.
https://www.corvetteforum.com/forums...vette-z06.html

Originally Posted by OLD_GOAT
Lastly, I miss the hell out of the PDR. This being said the time slip app on the Hellcat is a lot closer to the timeslips than the PDR camera is. My 11.02 showed as a 11.1 on the Hellcat, while the 10.92 showed up as an 11.2 in the C7Z PDR. I'm going to attach a view of the Hellcats timeslip which is a part of their performance pages. Don't ask about the Hellcats performance page 1/8 time and speed, as it seems to be way off.
I've never stated the PDR was 'that' close to a drag strip timer.



Old 05-04-2020, 03:57 PM
  #46  
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Originally Posted by OLD_GOAT
Who says that dragy is the 'God' of all the instruments? We've all known for years the PDR isn't really that close.
No one has said the Dragy is the God of all instruments.
It is just another level of accuracy the PDR does not have, as has been shown here and acknowledged by you.

Originally Posted by OLD_GOAT
Here is some more for your posterity.
https://www.corvetteforum.com/forums...vette-z06.html

I've never stated the PDR was 'that' close to a drag strip timer.
To my knowledge, no one has accused you of making a statement like that.
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Old 05-04-2020, 10:06 PM
  #47  
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I would like to see the inbuilt timer tested when the car starts moving at 2mph to see if it even starts timing.
Old 05-05-2020, 07:31 AM
  #48  
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Originally Posted by randyn
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.
true! I went from a 0-60 guy when I was in my twenties too a 1/4 mph guy in my late thirties. The difference is if 0-60 is fast it means you have amazing grip but if you’re 1/4 mph is high you have a really fast car!
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Old 05-05-2020, 08:30 AM
  #49  
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Originally Posted by sprayer
I would like to see the inbuilt timer tested when the car starts moving at 2mph to see if it even starts timing.
Good idea, just let off the brake and don’t hit the gas to creep forward slowly till it starts?
Old 05-05-2020, 10:48 AM
  #50  
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Originally Posted by vrybad
You're really taking this personally for some reason.
Why are you such an opponent to some additional accuracy?
People could also use the VBox or Performance Box as an alternative to the Dragy.
I find it most entertaining to observe import and C7 owners here fist pounding for weeks on end refusing to accept how quick the base C8 is.
The only thing more ridiculous than this is their quest for "additional accuracy" as you put it. A C8 0-60 time reported by GM or any of the independent auto press testers less than 3 seconds is absolutely the result of defective timing apparatus or flat out cheating but a time in excess of 3.0 seconds is reputable, accurate and ***** on. "additional accuracy" in this case appears to be numbers in line with the nay sayers and conspiracy theorists hopes and expectations.
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Old 05-05-2020, 11:13 AM
  #51  
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So rollout is standard in all numbers unless you're out to prove a C8 can't do 0-60 in 3. OK, just need to be clear that everyone accepts it for other cars, just not the C8, that way you can stand defiantly with your hands on your hips and scream it doesn't do what they say, even though they used standard accepted practices to measure it.
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Old 05-05-2020, 12:37 PM
  #52  
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So, IMHO, to the rational mind the 2.6s looks more dubious and maybe the circumstances around them the more as well but..before we start the who said what and go for the pitchforks...

FOR THE RECORD; GM CLAIM IS 0-60 in 2.9 seconds with Z51 package. And it's been that all along...

https://www.chevrolet.com/performance/corvette

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Old 05-05-2020, 01:38 PM
  #53  
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Originally Posted by punky
I find it most entertaining to observe import and C7 owners here fist pounding for weeks on end refusing to accept how quick the base C8 is.
The only thing more ridiculous than this is their quest for "additional accuracy" as you put it. A C8 0-60 time reported by GM or any of the independent auto press testers less than 3 seconds is absolutely the result of defective timing apparatus or flat out cheating but a time in excess of 3.0 seconds is reputable, accurate and ***** on. "additional accuracy" in this case appears to be numbers in line with the nay sayers and conspiracy theorists hopes and expectations.
A picture is worth a thousand words.


Old 05-05-2020, 05:18 PM
  #54  
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Originally Posted by carriccp
You realize drag strips are allowed to run downhill 1% from start to finish, so that the finish line can be up to 13ft lower than the start, right?
Do they all hide the slope of their strips like our Dragy fellow is hiding his?

I never said it was significant, it probably isn't, but it's data, and it's being withheld for some reason.



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Old 05-05-2020, 06:08 PM
  #55  
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Originally Posted by Phil1098
So rollout is standard in all numbers unless you're out to prove a C8 can't do 0-60 in 3. OK, just need to be clear that everyone accepts it for other cars, just not the C8, that way you can stand defiantly with your hands on your hips and scream it doesn't do what they say, even though they used standard accepted practices to measure it.
If this is standard then it is bs. How can you state 0-60 and then allow rollout where the car can be going what 3-5mph?

If they all do it then they are all guilty of the same bs. If rollout is in all of the times then they cannot call it 0-60. Pretty simple to understand.

So why is it done? Just to make times look better is the answer.

Originally Posted by PRE-Z06
Good idea, just let off the brake and don’t hit the gas to creep forward slowly till it starts?
​​​​​​​Yes exactly.

Last edited by sprayer; 05-05-2020 at 06:11 PM.
Old 05-05-2020, 06:16 PM
  #56  
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Originally Posted by sprayer
If this is standard then it is bs. How can you state 0-60 and then allow rollout where the car can be going what 3-5mph?

If they all do it then they are all guilty of the same bs. If rollout is in all of the times then they cannot call it 0-60. Pretty simple to understand.

So why is it done? Just to make times look better is the answer.
This coming from a guy that drives a $1,000 car every day. Go back under your bridge troll, you bring NOTHING to the C8 section.
Old 05-05-2020, 06:25 PM
  #57  
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Originally Posted by Phil1098
This coming from a guy that drives a $1,000 car every day. Go back under your bridge troll, you bring NOTHING to the C8 section.
​​​​​Yeah and spent more money on a C6Z than you will on your brand new C8.

Why do you have to make personal attacks every chance you get? Are you really that insecure, sucks to be you.

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Old 05-05-2020, 06:31 PM
  #58  
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Originally Posted by sprayer
​​​​​Yeah and spent more money on a C6Z than you will on your brand new C8.

Why do you have to make personal attacks every chance you get? Are you really that insecure, sucks to be you.

​​​
Because I get sick of your constant pissing on the C8, you don't like it, fine, why don't you post in the C6 section? What do you think you're contributing to the C8 section? Every single post of yours is negative about the C8, not one or two, every single one and there are probably hundreds. I can't imagine spending over $65,000 on a car to drive a $1,000 car every day, yeah, it sucks to be me.
Old 05-05-2020, 06:31 PM
  #59  
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Originally Posted by sprayer
​​​​​Yeah and spent more money on a C6Z than you will on your brand new C8.

Why do you have to make personal attacks every chance you get? Are you really that insecure, sucks to be you.

​​​
Too funny!

Old 05-05-2020, 06:34 PM
  #60  
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Originally Posted by Phil1098
Because I get sick of your constant pissing on the C8, you don't like it, fine, why don't you post in the C6 section? What do you think you're contributing to the C8 section? Every single post of yours is negative about the C8, not one or two, every single one and there are probably hundreds. I can't imagine spending over $65,000 on a car to drive a $1,000 car every day, yeah, it sucks to be me.
So you don't like anything anyone says that does not follow your agenda. Got it, not sure why you visit the forums since it raises your blood pressure so much. Look at you, you are a mess all from an opinion posted by someone on the forum.

Total train wreck you are, you need some help.

Your post also highlights what you perceive as being important in life, which it is not. You see someone driving a cheap car and automatically associate them to living under a bridge. You judge people based on what choice they make, disgusting qualities to have as an individual.

Last edited by sprayer; 05-05-2020 at 06:39 PM.


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