Drag Racing Technique Improve your track times

Where do I bracket race?

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Old Dec 8, 2008 | 03:51 PM
  #1  
Shon Herron's Avatar
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Where do I bracket race?

bracket car here, made 6 passes
1st/worst pass was a 7.45 @90ish--dont have that timeslip....

1.501/7.322 @ 91.448
1.504/7.347 @ 90.965
1.496/7.334 @ 91.033
1.517/7.336 @ 93.141
1.517/7.335 @ 93.182

DA was around 0, car is finally where I wanted it to be for the mods it has.
Which are:
3110# raceweight, that is with me in it.
Stock LS1 with LS6 intake and P&P TB, Pacesetter Headers, Y-pipe into muffler shop piping/Aerochamber in stock location, Built A4/PT4400, 10bolt with 4.10s. I am using a LT1 CAI. I am doing the tuning on it as well.
Suspension is QA1 R with springs (not sure of rate, they were used), QA1 12ways on the back with Spohn Drag bar along with Spohn TA with DSL.
ET Drags/26x10x15 on Telstars.

Just for comparison I was running stiff sidewall Drags on the first 3 runs and then swapped to the soft sidewalls and switched lanes b/c it was in the sun, I am not claiming the extra 2MPH on anything but different lanes of the track. although I did lean it out 5% over the other runs in the Left lane but need more track time to see if that was the difference or not. but tracks are closed now for a little while.

Launch is off idle, have not played with launch technique yet.

Vids of the runs, found these from someone at the track that day

http://www.vimeo.com/2464626
http://www.vimeo.com/2465006

I think the car looks slow in those vids, LOL

Last edited by Shon Herron; Dec 8, 2008 at 03:55 PM.
Old Dec 8, 2008 | 05:11 PM
  #2  
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rje
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Nice! That pretty good for no more mods than you have.

Randy
Old Dec 8, 2008 | 10:29 PM
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3DFORMULA's Avatar
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Thats dangerous consistent there.
Old Dec 9, 2008 | 05:51 AM
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I had to look at the time stamp on them to make sure we had not gotten the carbon copy.
Old Dec 9, 2008 | 06:47 AM
  #5  
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Good runs.
Wait until you try stalling it up, you'll knock that 60' down into the low 1.4s
Old Dec 9, 2008 | 07:40 AM
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Now that the rear end is consistant that will be the next process to figure out.
but it will be a couple of months before I go out again, tracks are closing for a while.
Old Dec 9, 2008 | 05:28 PM
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sawwweeet shon! im happy for ya man! btw that track is pretty fricken cool lol...

btw i dn if u remember but i bought my first major mod off u... pacesetter longtubes.... and im running mid 12's bolt on only... lookin for low 12's next year
Old Dec 10, 2008 | 09:29 PM
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I've always stated that speed means nothing in a bracket race. A slow car can win just as easily as a fast car. It just takes more money to go fast.

Making a car deadly consistent is harder than making a fast car.

It's interesting that your 60' times fluctuate so much on each run except for the last 2. With 1/8 mile, there's less downtrack timers to see what it's doing.

You know how long it takes to go the first 60'. Do you have 330' timers? How long did it take to go from 60' to 330'? How long did it take to go from 330 to 660? That can tell you where you picked up or slowed down. Since everything happens in the first 1/8 mile, changes in the ET are either in the traction of the first 60' or shift points until you get into high gear. MPH is an indication of HP. You can spin off the line and still get the same MPH as hooking hard off the line.

In a 1/4 mile, you'll be mid 11's.
Old Dec 11, 2008 | 06:44 AM
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couple of weeks ago with a 7.4x it went 11.7 and on a 7.28 it went 11.59...

1.501 4.691 7.322 91.448
1.504 4.703 7.347 90.965
1.496 4.692 7.334 91.033
1.517 4.695 7.336 93.141
1.517 4.694 7.335 93.182

So you think the 60's are inconsistant??? you should have seen them before the rear got fixed....i would pull a 1.50x and then a 1.6x and it just went every where, I thought the 1.50x back to back was good and then switch lanes and tires and pull 1.51x on a track that was going away....people breaking and street tires, I was ready to go....

This car has 4.10s with the 4L60e, it is shifting to 2nd before the 60' I believe, shift points are near 6000. I am thinking it is possible to run quicker with 3.73s or else I need to shift on up in the 6100+ range....who knows.....but I am looking for a complete rear end with 3.73s locally just to swap and see what happens.

Thoughts and suggestions? NOTE it will be 2+ months before I get back to a track though....

Originally Posted by Stephen 87 IROC
I've always stated that speed means nothing in a bracket race. A slow car can win just as easily as a fast car. It just takes more money to go fast.

Making a car deadly consistent is harder than making a fast car.

It's interesting that your 60' times fluctuate so much on each run except for the last 2. With 1/8 mile, there's less downtrack timers to see what it's doing.

You know how long it takes to go the first 60'. Do you have 330' timers? How long did it take to go from 60' to 330'? How long did it take to go from 330 to 660? That can tell you where you picked up or slowed down. Since everything happens in the first 1/8 mile, changes in the ET are either in the traction of the first 60' or shift points until you get into high gear. MPH is an indication of HP. You can spin off the line and still get the same MPH as hooking hard off the line.

In a 1/4 mile, you'll be mid 11's.

Last edited by Shon Herron; Dec 11, 2008 at 08:37 AM.
Old Dec 11, 2008 | 08:34 AM
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Not too shabby. Bracket racing is a lot harder that it looks. Car needs to be predictible rather than dead on consistant. Driver needs to be able to cut a light and drive on the top end of the track. You made changes between runs 3 and 4. Came up with a different 60' so you should of ET'ed quicker in run 4. I think it just happend to be the same ET numbers. Moveing from the shade into the sun will slow you down .02 to .03 in the 1/4. Doesn't effect the 1/8 mile as much but still effects it. If you do decide to bracket race and need some help give me a shout. There's not a lot of bracket racers on the site. Good luck.
Old Dec 11, 2008 | 08:39 AM
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The bracket racing comment was a 'joke' but if the car ends up being this consistant I might try it, it would be fun, if i can learn to cut a light....

The track was in the sun on the right side, runs 4&5, that is why moved over there, people were telling me it was hooking better and once I got up there, that was the only ran open....

And I like that 1.49 60' but until I can pull several in a row, I will fluke that one....

Last edited by Shon Herron; Dec 11, 2008 at 08:41 AM.
Old Dec 11, 2008 | 08:52 AM
  #12  
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Originally Posted by Stephen 87 IROC
It's interesting that your 60' times fluctuate so much on each run except for the last 2. With 1/8 mile, there's less downtrack timers to see what it's doing.
Stephen:
The 60' aren't too bad. If you hold some in the bank you can adjust on the top end. The differences could even be due to staging in a slightly different spot. There were tire and lane changes (in the sun) between runs 3 and 4.


To the rest if the group:
From a bracket racing prospective if I'm off .03 on my 60' I'm looking to slash my wrists. When bracket racing the 60's do need to be dead nuts on. If your 60' are off (different) so will be your lights and ET resulting in a quick trip home.
Old Dec 11, 2008 | 08:58 AM
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Originally Posted by kazman
The differences could even be due to staging in a slightly different spot.
VERY true, I do not have a technique of staging, just light the first bulb wait on the other guy and then roll in, I am inconsistant on that for sure, sometime it rolls further and sometimes I roll in just enough to flicker the lights. dont recall deep staging on this trip but sometimes i might do that too.

it's all in fun, heck, if the time is right, I will leave on the first bulb if I know the car beside me is alot faster than me....he has to catch me, locals dont notice that from the sidelines, they just see a stock motor'd car treeing the other guy and him having to walk me down,
Old Dec 11, 2008 | 09:50 AM
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Originally Posted by Shon Herron
VERY true, I do not have a technique of staging, just light the first bulb wait on the other guy and then roll in, I am inconsistant on that for sure, sometime it rolls further and sometimes I roll in just enough to flicker the lights. dont recall deep staging on this trip but sometimes i might do that too.

it's all in fun, heck, if the time is right, I will leave on the first bulb if I know the car beside me is alot faster than me....he has to catch me, locals dont notice that from the sidelines, they just see a stock motor'd car treeing the other guy and him having to walk me down,
Shon, where you stage the car has an impact to 60', ET and RT. Yes dispite what you hear they do effect each other. The deeper you stage the quicker you RT and slower the 60' and ET. The difference between shallow staged (blinking the stage bulb) and deep (just putting out the pre-stage bulb) is .10 (1/4 mile racing). If your looking for the best ET shallow stage as shallow as possible (try to blink the stage bulb). You need to be in the exact same spot every time. I can help you with your light too.
Old Dec 15, 2008 | 09:49 AM
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first eyar of bracket racing this past year... and it was harder then i thought, to say the least .... u can have the most consistant car in the world... but if u cant cut a consistant light... ur not worth a damn



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