Mathematically-based 0-60 mph calculator
Le Mans Master
Joined: Feb 2006
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From: Chandler Arizona
No problem, Glenn. Everybody here already knows the equations for velocity and acceleration, but mostly for constant acceleration. This model, with a third-order polynomial for distance, invokes a varying acceleration, and hence we must use calculus to derive the velocity. Real-world track performance does exhibit variable acceleration, so we need a model which allows for this.
Tech Contributor
Joined: Jul 2002
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From: St. Louis, MO
St. Jude Donor '08
And you are correct...HP Tuners scanning software will give you real 0-60 (or 0-any mph), as it graphs acceleration and time to the millisecond.
A 1.6x 60ft is a 3.3 0-60 in my car.
Safety Car
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From: Makena, Maui & NM
My 1.80 60' is a 3.60 0-60 in my car.
Tech Contributor
Joined: Jul 2002
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From: St. Louis, MO
St. Jude Donor '08
Blowing my rear to smithereens and ruining my trans in the process means that won't be happening again any time soon!
That is some spin upon shift! Sounds to me like you need new tires. I get maybe 2-3 mph spin on shifts, and I'm a manual.
Fresh tires are a GREAT mod. I'm starting to think that heat cycles are the limiting factor in drag radials like they are with road course tires.
Safety Car
Joined: Aug 2006
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From: Makena, Maui & NM
My recent string of 1.5 60 foots were 2.7 seconds 0-60
That is some spin upon shift! Sounds to me like you need new tires. I get maybe 2-3 mph spin on shifts, and I'm a manual.
Fresh tires are a GREAT mod. I'm starting to think that heat cycles are the limiting factor in drag radials like they are with road course tires.
That is some spin upon shift! Sounds to me like you need new tires. I get maybe 2-3 mph spin on shifts, and I'm a manual.
Fresh tires are a GREAT mod. I'm starting to think that heat cycles are the limiting factor in drag radials like they are with road course tires.
Tech Contributor
Joined: Jul 2002
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From: St. Louis, MO
St. Jude Donor '08
Not sure I agree with that. For my A6, my 60' times (and ET's) are actually coming down as my BFG DR's get worn down. My spin is partly due to disabling Torque Reduction Upshifts and while I am loosing time on the 1-2, I have a net gain disabling it via the 2-3 shift speed gain. Also, I run only in cold weather now, less than 50* (and usually less than 45*) which also has an effect on the traction of my 1-2 shift...as where horsepower overcomes the gripping ability of the tires, the 1-2 shift is where you'll start to get wheelspin.
When I spin at the launch, I'll typically go from 0 right up to 20 mph, and I get a 1.9 vs a 1.6 or better. That's .3. I would bet your best runs don't have that 20 mph spin on shifts, and if they do, your car is faster than you think it is!
Safety Car
Joined: Aug 2006
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From: Makena, Maui & NM
If you spin your tires 20 miles an hour faster than you are really going, you're losing ET...trust me.
When I spin at the launch, I'll typically go from 0 right up to 20 mph, and I get a 1.9 vs a 1.6 or better. That's .3. I would bet your best runs don't have that 20 mph spin on shifts, and if they do, your car is faster than you think it is!
When I spin at the launch, I'll typically go from 0 right up to 20 mph, and I get a 1.9 vs a 1.6 or better. That's .3. I would bet your best runs don't have that 20 mph spin on shifts, and if they do, your car is faster than you think it is!
Last edited by siffert; Apr 19, 2009 at 06:12 PM.
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Tech Contributor
Joined: Jul 2002
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From: St. Louis, MO
St. Jude Donor '08
All my best runs have that spin, in fact, I just set a new PB with 60', 1/8 and 1/4 mile with that 20 mph spin. btw-I get no spin at launch or on the 2-3 shift. I'll be more than happy to test your theory, by you sending me some new DR's. If I go faster, I'll pay for them and buy you a new set...If I go slower, nothing to you.OK?
Tell you what. If you buy a new set, eliminate that 20 mph spin, and your times don't improve, I'll send you a dollar! Standard bet Mortimer
I'll send you an additional $1 if you know what movie that's from.
Safety Car
Joined: Aug 2006
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From: Makena, Maui & NM
Tech Contributor
Joined: Jul 2002
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From: St. Louis, MO
St. Jude Donor '08
Safety Car
Joined: Aug 2006
Posts: 4,206
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From: Makena, Maui & NM
That's a C5. I think I should be asking A4 or A6 guys. What might be good for a stick isnt automatically the same for an auto.
Edit-DennisNJ says it doesnt matter...more dependant on burnout and air pressure.
Edit-DennisNJ says it doesnt matter...more dependant on burnout and air pressure.
Last edited by siffert; Apr 19, 2009 at 07:14 PM.
Race Director
Joined: Mar 2005
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From: Southampton NJ
http://www.cartek.net/videos/dennis1062.wmv
Tech Contributor
Joined: Jul 2002
Posts: 14,950
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From: St. Louis, MO
St. Jude Donor '08
whats this, 1.411 doesn't count because its an automatic
http://www.cartek.net/videos/dennis1062.wmv
http://www.cartek.net/videos/dennis1062.wmv
But suffice to say, and we would have to agree, we manual guys have twice as many pedals to worry about!
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
whats this, 1.411 doesn't count because its an automatic
http://www.cartek.net/videos/dennis1062.wmv
http://www.cartek.net/videos/dennis1062.wmv
...I didnt know you set an new 60' with your 10.62. 
But hey, at least I got the King of 60' dead-on!
Tech Contributor
Joined: Jul 2002
Posts: 14,950
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From: St. Louis, MO
St. Jude Donor '08
Are you saying Dennis says spinning 50 mph to 70 mph then back down doesn't matter to ET???
I know I lose major ET if I spin my tires, at the line or during shifts. If I have a bad track prep I have to shift easier (usually not due to ET concerns, but due to accident avoidance, when I spin on shifts I often go a little sideways).
Safety Car
Joined: Nov 2007
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From: Bethesda MD
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