0-60mph from time slips

[steve142857]

Hey guys!
I have been wondering for quite some time now how my car does the 0-60mph... I have downloaded an application on my iphone (Dynolicious), but I wanted something to validate it. I made some researches on Google and found on a Corvette forum a link to an excel spreadsheet that a mathematician did using data from our time slips.
You enter in the top left your times for 60 ft, 330 ft and 1/8 mile and it will extrapolate a curve and estimate (quite accurately) your 0-60 mph time, the distance needed to reach 60mph and your estimated speed for the 1/8 mile. Actually, you can validate that time with your actual time and if it is close or right on, than the 0-60mph estimate should be very very close to the actual number.
I put my numbers for my best run of yesterday and it was spot on :
When I put : 1.865; 5.352 and 8.291 and it calculated a 0-60mph of 4.31 seconds reached in 232 ft and a speed of 83mph at 1/8 mile. I validated those numbers with my actual speed at the 1/8 mile which was in fact 83.3mph... I checked it with other runs, other cars and it is very impressive how accurate it looks.
So I thought that some of you might be interested. I know I am obsessed with numbers and stats lol!
Enjoy and let me (us) know what it did for you... :zoom:
http://forums.corvetteforum.com/c6-...mathematically-based-0-60-mph-calculator.html

 

[93rev2sev]

Cool. How close waas dynolicious? I have Dynostorm for my Blackberry so I'm curious how well it does.

 

[steve142857]

Cool. How close waas dynolicious? I have Dynostorm for my Blackberry so I'm curious how well it does.

To best answer your question and my best validation is when I tried the dynolicious at the drag and compared to the time slip.

Time slip says :
60ft : 1.88 sec.
1/8 : 8.32 sec.
1/4 : 12.98 sec.
trap speed : 107.3mph

Dynolicious says :
60ft : 2.16 sec.
1/8 : 8.51 sec.
1/4 mile : 13.07 sec.
trap speed : 109.8mph
0-60mph : 4.51 sec.

So, it looks to me that the dynolicious reads slower at the beginning and readjusts towards the end. The trap speed might be a different way to calculate. At the drag, it is the average of the last 60ft and maybe the dynolicious takes an instant measurement of the speed at the end of the 1/4 mile...

Since my 60ft was 1.88 and dynolicious said 2.16, that is almost a 0.3 sec diffrence and at the 1/8 there is still a 0.2 sec difference. So for the 0-60, I think we can remove a good 0.2 sec. and it would bring it to around 4.3 sec., just like the excel spread sheet suggests.

Sounds right to you?

Thanks

 

[jayro]

Man, thats impressive. Especially for such a heavy car.

 

[93rev2sev]

I'm not sure. I have no timeslips to back up Dynostorm's claims, but when I've used it in a car that was supposed to be a little bit faster, Dynostorm agreed.

A car that just barely pulls on me was clocked by dynostorm as .2 seconds faster in the quarter than my car.

I think Dynostorm/licious is great for comparing one car to another, but the actual numbers can be off from reality by quite a bit.

 

[steve142857]

I'm not sure. I have no timeslips to back up Dynostorm's claims, but when I've used it in a car that was supposed to be a little bit faster, Dynostorm agreed.

A car that just barely pulls on me was clocked by dynostorm as .2 seconds faster in the quarter than my car.

I think Dynostorm/licious is great for comparing one car to another, but the actual numbers can be off from reality by quite a bit.

2 things :
1 ) 1/4 mile time isn't the best indicator of 0-60 time. 1/8 mile would be a better indicator, but again, traction is a factor
2 ) I found that the way your phone is mounted in the car has a significant impact on the results... make sure it is stable and perfectly parallel to the the car... straight line.
Once well mounted, I found my app to be fairly consistent in its numbers and when compared to the time slips, not too far again, so for me, I believe it is a good indicator, but a bit slower than real life as explained above...

 

[steve142857]

I put Darreli's numbers in the spread sheet using his time slips from his 12.38 sec. run and it give a 0-60 of 3.89 sec... For an AWD car that runs the 1/8 mile in less than 8 seconds, that seems to be a good approx give or take a tenth, no more.

 

[steve142857]

For those of you interested (I think I am the one that loves the stats the most in this forum!), here is a site that gives the 0-60 and quarter mile times for almost every car. It is a good source of comparison :
http://www.zeroto60times.com/Ford-0-60-mph-Times.html

 

[hawkeye18]

That spreadsheet said my car has a 0-60 time of 4.57 seconds. I guess that's about right.

I checked out the website just posted, and it says my car has a 0-60 time of 4.5 seconds. So, sweet! It also says "Editor's Choice" with stars around it. I guess that's pretty cool too.

 

[steve142857]

That spreadsheet said my car has a 0-60 time of 4.57 seconds. I guess that's about right.

I checked out the website just posted, and it says my car has a 0-60 time of 4.5 seconds. So, sweet! It also says "Editor's Choice" with stars around it. I guess that's pretty cool too.

Yeah I have googled many many sites and these too are the most accurate... Glad you enjoyed them and saved the time of looking for them... I thought at first you were talking about the 95 SHO, but I saw on your signature that you have the new Stang... makes more sense! ; )

 

[hawkeye18]

I try not to mention it by name because people get all butt-hurt about it and think I'm gloating or something.

 

[Toolman]

Quit yer braggin! hehe

 

[Toolman]

I mean, come on, not all of us can afford a 95 ATX!

 

[Toolman]

I was imputing some old SHO slips in that Excel spreadsheet. It does okay with it's extrapolation when there is not a tremendous amount of wheelspin, or bogging off the line, but if your 60' is horrible, it effects the 1/8th predictions greatly.

I want to find some of my old turbo SHO slips, to see what it says my 0-60 was.

 

[steve142857]

I was imputing some old SHO slips in that Excel spreadsheet. It does okay with it's extrapolation when there is not a tremendous amount of wheelspin, or bogging off the line, but if your 60' is horrible, it effects the 1/8th predictions greatly.

I want to find some of my old turbo SHO slips, to see what it says my 0-60 was.

Well, I believe that is the point... If one car is unable to launch properly, then it takes more time to reach 60mph right? That is why my new SHO (with mods) has 4.3 sec. 0-60, which is comparable to the very fast cars out there, but I can barely go under 13 seconds... those other cars (Corvettes, etc.) go in the low 12's.
0-60 is a different performance indicator, but I like it because many people are unaware of 1/4 mile times and also the 0-60 times is about the best indicator of who would win at a stop light... if anyone does that sometimes... lol!

 

[Toolman]

No, I did not mean that the 0-60 time would be less reliable according to the spreadsheet (though it will be), but that the projected 1/8th mile speeds and times were quite far off from the actual timeslip, when the 60' was over 2.0-2.2. Whatever assumptions the originator of the spreadsheet was making fall apart when the car launches poorly.

 

[steve142857]

No, I did not mean that the 0-60 time would be less reliable according to the spreadsheet (though it will be), but that the projected 1/8th mile speeds and times were quite far off from the actual timeslip, when the 60' was over 2.0-2.2. Whatever assumptions the originator of the spreadsheet was making fall apart when the car launches poorly.

Ok, I get you. For sure with the AWD, that factor is out of the equation... Also, one factor not considered with this spreadsheet, is the time to shift, which is not a factor with ATX cars... But I validated with many time slips from cars I raced against, and I can say it is the best spreadsheet I have found so far... But it is true that most of them had 60 ft under 2.2...