What!!! What the hell are you calculating? Your calculating the distance of a car going 100mph to 105mph after 1 sec.

Lets say a car passes the 1/4 mark and you pass it one sec later at 100mph. You would have been

100mph % 60min= 1.666
for every minute it travels 1.666 miles
1.666 % 60sec= .0277
for every sec it travels .0277 miles
.0277 * 5280ft= 146ft
for every sec, a 100mph car will travel 146ft

This is just an average since there is no way of knowing the acceleration speeds

There is no way in hell a 13 sec car will only be ahead of a 14 sec car by only a car legnth, that's just stupid

 

You weren't racing heads up were you? When bracket racing you can sit at the line for 30sec and still run a 10 sec run

Let us know your mph then we'll talk

 

You weren't racing heads up were you? When bracket racing you can sit at the line for 30sec and still run a 10 sec run

Let us know your mph then we'll talk

 

no it was not bracket racing.

this topic is getting ghey, lets drop it, mmK?

 

Time for a lesson, I will be as straight forward as possable

Formulae of Motion :

u = initial velocity
v = final velocity
a = acceleration
s = distance
t = time


Now please note that the usual unit of distance in physics is actually measured in meter's per second.

Lets assume for arguments sake that the two vehicles are moving along side each other travelling at a rate of
38 m/s <--meters per second translation 85 mph. This is going to be a quarter mile race so lets say for example
that at this 85 mph we have just arrived at the 1/8 mile mark (ie.) half way done the race. We now need a unit of
time measure so I'll say our RX-7's time at the 1/8 mile mark will be 8.8 seconds for our example. Let us assume
for a moment that the gentleman in his heavily modified Mopar Camry wagon geared his transmission too low and
now met his top speed of 85 mph at the 1/8 mile point we can come up with a formula to calculate differentiation
of distance and time between the vehicles at completion of the race.
(Lot's of assumptions I know but hey thats physics!)

Now using this our almighty formulae:
s=ut+1/2 at^2

Now we are going to leave this camry in the dust cause we have NAwwZZZ!!!!

We hit the Nawzz button and wham!!! 1.5 seconds later we are now moving at 120mph, but alas our car blows all 6 apex seals...
Crap on a crutch!!!shoulda sprung for the 3 mill Hurleys!!! However with a air drag co-efficient unparalleled in the
areo/space industry being(pefect ) we can now see the difference between the vehicle moving at said rates
for speed 85mph or 38 m/s and us at 120mph or 53.6 m/s

accelleration= velocity change/ time taken
a=53.6m/s^-1 - 38m/s-1 /1.5 = 10.4ms^-2
distance s=ut+1/2 at²
s=(38x1.5)+1/2(10.4x1.5²)=57+1/2 (10.4x2.25)=57+11.7=68.7m or 225 feet
ok surmising that we have 1320 feet in 1/4 of a mile and we have travelled 660+225=885 that leaves us 435 feet or 132.5 meters
to go sooo....132.5/53.6 =2.47 seconds until we cross finish line, total time for us is 8.8+1.5+2.47= 12.77 seconds in the 1320. YIPEE
Now how many feet did we kick that Camry's *** by? lets see. travelling at said rate of speed 38m/sCamry is at 38 x (1.5+2.47)=495 ft
travelled in same amount of time that we completed the 1320 so....1320-660+495= 165 feet at the end of race and a final time of 14.09 seconds.

Hope this helps!!!

 

yes, it is gay! I didn't want to post but I just had to when I read all the bs

If it wans't bracket racing you were doing than what the hell was it? Even heads up drag racing starts when you leave the line, I believe

Anyways, I'll drop it if you drop it

 

Dude you officially are retarded and have no idea what you are talking about. You live in MD and so do I. We can meet at the dragstrip and sit at the 1/4 mark and we can watch 2 cars run with a second difference then you can kiss my *** when you see you are totally wrong.

The distance isnt constant for a second time difference. It is realitive to the speed. So you trapped at probably 90ish mph so you were probably 100-120 feet back I dont feel like doing the math.

But arguing on the internet is like the special olympics. If if you win you are still retarded.

 

BTW the mmK thing is about as flameworthy as it gets gay boy.

 

thanx thouse who helped. it made a huge difference and now i am a good second faster! it is all in off the line launching.. thanx pax, i was ghonna come to the auto/x but found out is is on sunday, cant make it now,, good luck and have fun!
chris

 

As a rule of thumb: at 100mph in the 1/4 mile a tenth of a second is one car length. So if you lose by one tenth aof a second saying you only do 100mph in the 1/4 your front bumper is even with their back bumper, one car length. If a car is 10' then one second behind would result in being beat by 100'.

 

If your not afraid of burning your cluch then i have your perfect lonch. First you have to find the spot on your throtle that lets you sit at 4k. Then as the lights are about to turn or what ever your starter is then you start to slide the cluch. You need to time it so you get to the spot where it wants to start kreeping up the light is about to turn. When the light turns slide the cluch out don't drop it but to stuff the gas to the floor. This eliminates the tire hop but you will get a little burn out. Don't get too exsited about the lonch bercause you need to shift out almost immeaditly. This is very hard on your cluch but i seen you already have a stage three in. This has aloud me to take STi's and Evos off the line.

 

O and for the shifting into your next gears, you need to practis letting your gas out just a little bit so your rpms stay up there and then dump the cluch. B carfull because second will kick out your *** end doing this. A lighter fly wheel or the Apex'i AVC-R boost control will help eliminate that turbo lag and b a little easer on your car.

 

God Chris, you really started something!
I had to weed through all this BS just to see what is going on.

Your car feels very fast - especially up top.
I think between the street port and moded twins, you have just a little more lag than a stock FD, until that second turbo kicks in. That is probably why he is getting you at the start.
A FWD car should not have the advantage at the start, unless he has a drag setup and is really good at launching his car. I think you just need to practice and maybe, as mentioned, get some nice, wide tires.
The 'back and forth' is from your shifting skill and shift point. As pax said, your dyno shows you need to shift sooner. And possibly, since your car is not tuned, you may be out of the powerband between shifts, causing a lag as you come back into it.

 

THANK YOU! now i don't have to type all of that. Some of this math was just hurting me to read. Common sense alone will tell you a car moving over 100mph will travel more than a few feet in a second.

 

wow, this thread is great. ive learned lots of math, and i learned that tensecond1320 is a 12 year old tard that loves to tell stories.

*gets another bag of popcorn and waits for tensecond1320 to respond to him getting over and over

 

What about LT1-RX7 and his PhD mathematics? And his comment about arguing online when he is the one that constantly keeps it going?

I swear....people come online and it's like their is a ******* Superman suit they slide into during Log In

 

K time to make you feel idiotic...

1st part is right.. second part makes you look ignorant. 1000ft is the total amount of distance you have accumulated over the entire 1/4mile =) You are traveling 154fps at 105mph

Once again you proved you have no clue what you are talking about. After one second going 100mph you would travel 146 feet.. not 8 feet (8 fps is the difference between traveling 100mph and 105mph) The second explain makes no since once again. Except to prove you have no clue what you wear reading lol. If someone passes you going 105mph and your going 100mph then they would pass you by 8fps.

Lol you don't do calculations in relative to moving points very often and if you do your not normally making a finite calculation you are finding the average or calibration curve.

If your going to make fun of people and tell them they are on crack make sure you put the pipe down before you start writing

Btw forgot to add that non of these calculations have anything to do with figuring out the distance between two cars after a 1/4mile race lol

 

Hi Bob,

3rd gear redlines at ~100 mph. I have downshifted from 5th to 3rd at ~80 mph hundreds of times since owning my FD with excellent results. Much more than 80 and I would stick with 4th though

 

one word "launch"

 

one word "launch"

 

oops double ppost

 

Time to make you feel idiotic cause apparently you cant read.

I said that "The 154 is the total amount of distance you have accumulated over the entire 1/4 mile." Meaning over the other guy during the race. and 1000ft is not a quarter mile it is 1320ft accumulated if you are going by what you thought I said.


Again what I said was "Try this drive down the road at 100mph when you get to a bridge have someone in the car start a stop watch after one second you are much farther than 8 ft." Which is the EXACT same thing you are saying. I said it will be much more than 8 feet learn to read before you attempt to insult someone. Notice the MUCH FARTHER THAN 8 FT!!!


Which is exactly why in the previous post I said "The one second difference is relative to a stationary point not a moving point." Again read what I write not what you think I write.

Apparently you need to heed your own advice because you are the one hitting it up.

No they dont but they do illustrate that it will be MUCH more than a car length between 2 cars that run a second difference in the 1/4.


Hey I already said I am in MD right near you so if you want to see Superman we can arrange for a meeting....HERO.

 

I realised the launch is everything. I got 14.5sec on a bogged down launch and 13.4sec on a good launch. This was on crappy 3 years old 225 tires.

I got it to 3k RPM, then dropped the clutch, letting the wheels to spin a bit.

At 13psi boost and about 17psi tire pressure in the back.