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Old 05-12-2013, 08:42 PM   #1
hardtail4383
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Default Rear Wheel Line locks on dragsters?

Wondering if any of you dragster racers out there run line lock on rear wheel brakes...talking through delay box! Our car settles nice and tight on trans brake application but occasionally (out of the blue) will settle slightly forward. Seems to be a good idea. Thanks in advance for any input!

Last edited by hardtail4383; 05-12-2013 at 08:43 PM. Reason: incorrect spelling
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Old 05-12-2013, 08:47 PM   #2
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Default Re: Rear Wheel Line locks on dragsters?

My car used to move forward some when getting on the brake, brought it to the trans guys and he changed something with the pressure to solve the problem.. Before it was fixed i would bring the motor up a bit before putting the t brake on
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Old 05-12-2013, 09:28 PM   #3
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Default Re: Rear Wheel Line locks on dragsters?

To me, there is no reason not to do this. I have my line lock ran with a diode to lock it down when I push my transbrake button. Anything you can do to keep the car in the same spot when you push the transbrake button will be, if nothing else, a piece of mind.
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Old 05-12-2013, 09:47 PM   #4
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Default Re: Rear Wheel Line locks on dragsters?

Your certainly right concerning pump pressure..we use starting line enhancer that elevates idle to approx 1800 RPM which should be adequate for trans brake application plus I check band adjustment about every 25 passes or so..Since line lock releases with TB release...just seems that it would be would added measure to insure that car remains exactly in same position relative to when it brake was applied! My primary reason for asking was if it might affect consistence performance. Went red 006 (number with 1) in box final last and foks on starting line said car moved slightly forward on TB application...Sux because opponent was 50 something on tree...having said that...he was GREEN..and that wins races! Heck..figure it's worth try!
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Old 05-12-2013, 09:58 PM   #5
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Default Re: Rear Wheel Line locks on dragsters?

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Originally Posted by Yenko View Post
To me, there is no reason not to do this. I have my line lock ran with a diode to lock it down when I push my transbrake button. Anything you can do to keep the car in the same spot when you push the transbrake button will be, if nothing else, a piece of mind.
That is my set up as well.
Like you said.....No reason not to do it.
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Old 05-12-2013, 10:55 PM   #6
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Default Re: Rear Wheel Line locks on dragsters?

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My primary reason for asking was if it might affect consistence performance.
My car would repeat like no others in my opinion. It did not affect my consistency at all. Matter of fact, it probably helped it. If you stage your car the exact same everytime, that will help your consistency. Bracket racing is all about consistency, if you make sure you do the same burnout, stage with the water temp the same, and stage the car in the exact same spot everytime, the only reason it would not be consistant is your tires are shot, or your tune up is wrong. Make everything the same, and have good equipment, and it has to be consistant.
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Old 05-12-2013, 11:06 PM   #7
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Default Re: Rear Wheel Line locks on dragsters?

I've got one in mine, and it does help! Car doesn't "rock" when I go on the brake, just sits there!
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Old 05-12-2013, 11:52 PM   #8
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Default Re: Rear Wheel Line locks on dragsters?

I don't have one... not sure if I need it! These cars will still rock line lock or not BTW
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Old 05-13-2013, 12:08 AM   #9
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Default Re: Rear Wheel Line locks on dragsters?

we run one, but it's only because of the lenco.don't need one on my bracket ride
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Old 05-13-2013, 09:41 AM   #10
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Default Re: Rear Wheel Line locks on dragsters?

Do some research on it, you'll find a 50/50 mix of guys who said it made their cars more inconsistent rt wise then it was before (brake pressure releases different all the time) ... and honestly its a bandaid fix for a trans issue to begin with.
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Old 05-13-2013, 10:41 AM   #11
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Default Re: Rear Wheel Line locks on dragsters?

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Do some research on it, you'll find a 50/50 mix of guys who said it made their cars more inconsistent rt wise then it was before (brake pressure releases different all the time) ... and honestly its a bandaid fix for a trans issue to begin with.
All depends on how much brake pressure you have I'm sure! Time for a brake pressure gauge!
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Old 05-13-2013, 12:18 PM   #12
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Default Re: Rear Wheel Line locks on dragsters?

The better way is to fix the trans
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Old 05-13-2013, 01:07 PM   #13
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Default Re: Rear Wheel Line locks on dragsters?

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The better way is to fix the trans
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Old 05-13-2013, 01:21 PM   #14
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Default Re: Rear Wheel Line locks on dragsters?

If you timed the both-line lock doesn't release as fast as a trans brake.Mechanically it couldn't.
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Old 05-13-2013, 01:23 PM   #15
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Default Re: Rear Wheel Line locks on dragsters?

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Originally Posted by Wicked Fast View Post
The better way is to fix the trans
That car can still rock even after the transbrake is set though... I though a large part of the line lock on a door car is to keep the gear mesh tight...
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