DRAG RACERS - TWM CALCULATION

[Hammer]

This ones for hard core drag racers who want to see how far ahead or behind you were at the win stripe.

Car one RT + ET -DIAL = TRUE WIN MARGIN (TWM)
Car two - RT + ET - DIAL

TWM (1.47) WINNING MPH = DISTANCE WINNING CAR WAS AHEAD AT THE STRIPE

Try it when the NHRA races start again and you'll see it works perfect. Of course there won't be a dial in the pro ranks, so just use the ET and RT of the cars or bikes.

[flyin ryan]

I use that all the time. Can't believe how many people are shocked when I show them...just makes sense :dontknow:.

[Hammer]

I use that all the time. Can't believe how many people are shocked when I show them...just makes sense :dontknow:.

I'm not at all surprised you know this calc Ryan.

[4DSZR1]

Interesting

John could you please show an example?

Let me see if I get it. The first calc is to get a time. the second calc then turns it into feet?

(TVM 1.47) 135mph = 198.5

I don't think I'm getting it :mad:

Thanks

Rick

[Hammer]

You bet Rick. Below is a real example of a race I won in 2006 with #458. The round I am using is the last round. Long story why the dial in on the car doesn't match the dial-in I show below, well not that long. I'll save that for later though.

The formula actually should have been as below:

Car one RT + ET -DIAL = Losing Car
Car two - RT + ET - DIAL = Winning Car
= TRUE WIN MARGIN (TWM)

TWM (1.47) WINNING MPH = DISTANCE WINNING CAR WAS AHEAD AT THE STRIPE

Car 1-THEM .115+13.204-12.98 = .339
Car 2 - ME -.058+13.678-13.45 = .286
TWM = .339 -.286 = .053 (I went across .053 secs before the other guy)

CALC .053 (1.47) 106.43 = 8.29'

So I went across the finish line 8.29' ahead of the other car in that race. Most tracks show the TWM or MOV (Margin of Victory) at the bottom of the timeslip. You can take that and plug it into the formula. Margin of Victory shown on the slip of the race above was .0535, so the timers are showing the MOV/TWM to 4 places instead of the calculated 3 places I show in the formula.

If you were to race all the time, and used this formula, you would crap at how close races can be. I have won and lost races by less than an inch a number of times.

Hope this helps Rick. Let me know.

http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Stuff/103-109ChampPic2006.jpg?t=1262052907

[4DSZR1]

Thanks John,

Makes sense now, 100% Cool stuff.

Hope you had a nice Christmas and wish you a Happy New Year

[Dynomite]

Below is a real example of a race I won in 2006 with #458.

So I went across the finish line 8.29' ahead of the other car in that race. Most tracks show the TWM or MOV (Margin of Victory) at the bottom of the timeslip. You can take that and plug it into the formula. Margin of Victory shown on the slip of the race above was .0535, so the timers are showing the MOV/TWM to 4 places instead of the calculated 3 places I show in the formula.

I have won and lost races by less than an inch a number of times.



I am not familiar with this calculation but if your top speed across finish line was 106.43 mph you were going 156.0973 ft in a second. Or in .0535 seconds you went 8.35 ft.

Now....does this not assume you were averaging 106.43 mph in that 8.35 ft when in fact your average speed in that increment of distance was a bit less :happy1:

Again...I may be in way over my head here ....no do not say it Hammer ...I know what you are thinking :sign10:

This would not make any difference here, but if you beat the guy by a second.....maybe it would :drunken_s Or if you are getting winning distance numbers within an inch...I would say you might be more than an inch off :sign10:

Or your LT5 crapped out and you were no longer accelerating :D

[Hammer]

I am not familiar with this calculation but if your top speed across finish line was 106.43 mph you were going 156.0973 ft in a second. Or in .0535 seconds you went 8.35 ft.

Now....does this not assume you were averaging 106.43 mph in that 8.35 ft when in fact your average speed in that increment of distance was a bit less :happy1:

Again...I may be in way over my head here ....no do not say it Hammer ...I know what you are thinking :sign10:

This would not make any difference here, but if you beat the guy by a second.....maybe it would :drunken_s Or if you are getting winning distance numbers within an inch...I would say you might be more than an inch off :sign10:

Or your LT5 crapped out and you were no longer accelerating :D

What? Just kidding.

I think I might have been going a little faster than the 106.43, as that MPH is an average over the last 66' of the 1/4 mile, not the last 8.35'.

Great comments...but... this calc seems to be accurate...enough for the NHRA, plus I like it when I win by inches, or lose by inches. :dontknow:

[Dynomite]

What? Just kidding.

I think I might have been going a little faster than the 106.43, as that MPH is an average over the last 66' of the 1/4 mile, not the last 8.35'.

Great comments...but... this calc seems to be accurate...enough for the NHRA, plus I like it when I win by inches, or lose by inches. :dontknow:

See....I told you I was over my head :sign10:......I did not know the MPH was average over last 66 ft :thumbsup:

[Hammer]

See....I told you I was over my head :sign10:......I did not know the MPH was average over last 66 ft :thumbsup:

No problem at all. You can actually place the blocks as far away as 132' (off road races) and as close as 6 feet and get a mph. We were using 6' at 330' street races in Winnemucca, Nevada. NHRA and all their tracks use the 66 foot placement. Don't ask me why though.

New Avatar just for you Dynoman...

[Dynomite]

No problem at all. You can actually place the blocks as far away as 132' (off road races) and as close as 6 feet and get a mph. We were using 6' at 330' street races in Winnemucca, Nevada. NHRA and all their tracks use the 66 foot placement. Don't ask me why though.

New Avatar just for you Dynoman...
Do not think I did not notice your avatar :sign10:
I liked the christmas outfit avatar just before this also :thumbsup:

[Hammer]

Do not think I did not notice your avatar :sign10:
I liked the christmas outfit avatar just before this also :thumbsup:

Not that one...this one. :mrgreen:

[Dynomite]

Not that one...this one. :mrgreen:

I have to hurry up and look at that one before it is removed by management....:sign10:

You and Jeffvette are two of a kind :thumbsup:

[Hammer]

I have to hurry up and look at that one before it is removed by management....:sign10:

You and Jeffvette are two of a kind :thumbsup:

Shhh, don't draw attention.

[flyin ryan]

You bet Rick. Below is a real example of a race I won in 2006 with #458. The round I am using is the last round. Long story why the dial in on the car doesn't match the dial-in I show below, well not that long. I'll save that for later though.

You should have posted the round you RED lit against me in Portland & explain that to Rick & the boys...:redface:.

[4DSZR1]

Red lit? All I heard was that the tree was malfunctioning? ;) I can be such a troublemaker

[flyin ryan]

Red lit? All I heard was that the tree was malfunctioning? ;) I can be such a troublemakerNo, no...Tree was working fine :). John actually seen Red twice on that pass...from his Red light, then when I went by him...remember that buddy :mrgreen:, LMAO!

[Hammer]

I was just commenting to Rick the night before, that I was surprised Ryan hadn't commented on my red light in Portland yet. Guess I just had to give it time. :mad:

Hope to see red again in Portland again in 2010. :thumbsup:

[flyin ryan]

I was just commenting to Rick the night before, that I was surprised Ryan hadn't commented on my red light in Portland yet. Guess I just had to give it time. :mad:

Hope to see red again in Portland again in 2010. :thumbsup:If we come up against each other, I plan on leaving before the tree is even activated!...Will have to if I want to get out on you :dontknow: :mrgreen: