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Line Locks locking out rear wheels #336338
06/02/09 06:30 PM
06/02/09 06:30 PM
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Posts: 241
Connecticut,usa
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kjg Offline OP
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Connecticut,usa
I was told that with an automatic trans that you should lock out the rear wheel anyone doing that and why?

Re: Line Locks locking out rear wheels [Re: kjg] #336339
06/02/09 06:33 PM
06/02/09 06:33 PM
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KYbywayof WV
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Frito Offline
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Huh!!

Re: Line Locks locking out rear wheels [Re: kjg] #336340
06/02/09 06:49 PM
06/02/09 06:49 PM
Joined: Jan 2006
Posts: 587
San Clemente, ca
enelson Offline
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I think that's outlawed for most tracks and sactioning bodies, and I assume you mean to use it like a budget transbrake (4 wheel lockout)

Thats the only way I've heard of people using em with rwd cars on the rear.

Re: Line Locks locking out rear wheels [Re: enelson] #336341
06/02/09 07:38 PM
06/02/09 07:38 PM
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Riverside, Ca
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G_bob Offline
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Quote:

I think that's outlawed for most tracks and sactioning bodies, and I assume you mean to use it like a budget transbrake (4 wheel lockout)

Thats the only way I've heard of people using em with rwd cars on the rear.




My line lock is on the rear brakes. When I push the button, I only have front brakes. I control rollout in the burnout box with foot pressure.

Never been asked in tech how my linelock is plumbed. I know I'm not the only one on the board with it plumbed that way.

Re: Line Locks locking out rear wheels [Re: G_bob] #336342
06/02/09 07:55 PM
06/02/09 07:55 PM
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USA
Ron Silva Offline
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Yes, it is NHRA Legal to use the line lock on the rear Brakes. Either way. To hold pressure or to block it.

What do you think a FWD car does??


SRT DEMON ONE SEAT
Re: Line Locks locking out rear wheels [Re: Ron Silva] #336343
06/02/09 08:29 PM
06/02/09 08:29 PM
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Posts: 587
San Clemente, ca
enelson Offline
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They e-brake but you get my drift

I guess most people run the line lock to hold but I can see the benefit of having it on the rear wheels to block, at least you never have to worry about rolling out of the burnout box early or not getting tires hot enough (happened to me my first time) Its very easy to not apply enough front brake before hitting the button.

I thought I had read there was some issue with it but maybe was just misinformation... Either way, thanks for the insight I didn't think about it that way.

Re: Line Locks locking out rear wheels [Re: enelson] #336344
06/03/09 01:54 AM
06/03/09 01:54 AM
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Red Deer, Alberta
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bill_greenwood Offline
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There is one drawback. When I release the brake to roll out of the box, there is a great deal of residual drag on the front brakes, so you have to flick off the line-loc at the same time. Now, I didn't realize this would be an issue, so I mounted the switch on the dash, which makes it a little extra busy if the car goes a bit to the side in the burnout.

Re: Line Locks locking out rear wheels [Re: kjg] #336345
06/03/09 01:06 PM
06/03/09 01:06 PM
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Cincinnati, Ohio
d7cook Offline
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It used to be NHRA illegal but they changed it. I have mine in the rear brakes (have to install backwards). I like having control of the front brakes when doing a burnout. I can control how fast I come out under power and feel safer with my foot on the brake to react quickly should the throttle stick or something else happen.


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Re: Line Locks locking out rear wheels [Re: d7cook] #336346
06/03/09 01:39 PM
06/03/09 01:39 PM
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USA
Ron Silva Offline
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I will say this again. If you use the line lock to "block" the rear brakes, PLEASE consider using a "dead Man" switch. They can be purchased in different styles : toggle, pushbutton etc.

This will make sure you will have rear brakes at the end of the quarter mile.


SRT DEMON ONE SEAT
Re: Line Locks locking out rear wheels [Re: d7cook] #336347
06/03/09 01:40 PM
06/03/09 01:40 PM
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Posts: 1,808
North Dakota
Azzkikrcuda Offline
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That is how mine is set up, works great.

Re: Line Locks locking out rear wheels [Re: Ron Silva] #336348
06/03/09 04:23 PM
06/03/09 04:23 PM
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Riverside, Ca
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G_bob Offline
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Quote:

I will say this again. If you use the line lock to "block" the rear brakes, PLEASE consider using a "dead Man" switch. They can be purchased in different styles : toggle, pushbutton etc.

This will make sure you will have rear brakes at the end of the quarter mile.






I orginally had a push on/push off switch on mine. I also wired an indicator light on the dash so I would know it was on. I still ended up forgetting to turn it off a couple of times and didn't realize it until I noticed the light on on the return road.

I now have it wired to a switch on on the shift knob of the hurst qtr stick shifter. Have to hold the switch down with my thumb to engage the line lock.

Re: Line Locks locking out rear wheels [Re: G_bob] #336349
06/03/09 05:01 PM
06/03/09 05:01 PM
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1 Offline
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Quote:

Quote:

I think that's outlawed for most tracks and sactioning bodies, and I assume you mean to use it like a budget transbrake (4 wheel lockout)

Thats the only way I've heard of people using em with rwd cars on the rear.




My line lock is on the rear brakes. When I push the button, I only have front brakes. I control rollout in the burnout box with foot pressure.

Never been asked in tech how my linelock is plumbed. I know I'm not the only one on the board with it plumbed that way.




Me too on my street car. Car does awesome burnouts on the street, but everyone thinks I'm power braking it because my rear brake lights are on.

Re: Line Locks locking out rear wheels [Re: Challenger 1] #336350
06/03/09 05:57 PM
06/03/09 05:57 PM
Joined: Jan 2003
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Riverside, Ca
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G_bob Offline
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Quote:

Quote:

Quote:

I think that's outlawed for most tracks and sactioning bodies, and I assume you mean to use it like a budget transbrake (4 wheel lockout)

Thats the only way I've heard of people using em with rwd cars on the rear.




My line lock is on the rear brakes. When I push the button, I only have front brakes. I control rollout in the burnout box with foot pressure.

Never been asked in tech how my linelock is plumbed. I know I'm not the only one on the board with it plumbed that way.




Me too on my street car. Car does awesome burnouts on the street, but everyone thinks I'm power braking it because my rear brake lights are on.




You could always put in a relay so the linelock circuit cuts power to the brake lights when applied.

Re: Line Locks locking out rear wheels [Re: G_bob] #336351
06/03/09 06:24 PM
06/03/09 06:24 PM
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1 Offline
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Me too on my street car. Car does awesome burnouts on the street, but everyone thinks I'm power braking it because my rear brake lights are on.




You could always put in a relay so the linelock circuit cuts power to the brake lights when applied.




Great idea.

Re: Line Locks locking out rear wheels [Re: Challenger 1] #336352
06/03/09 09:22 PM
06/03/09 09:22 PM
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Columbus, OH
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davesdartgt Offline
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Columbus, OH
If you install the line lock backwards into the rear brakes to lock them out make sure there is not a one way valve. The TCI unit I have has a one way valve & wouldn't let pressure to the rear brakes at all if the button was pushed or released.
This is from TCI's website
"The Roll Stop® keeps the front brakes applied. If you did not pump up enough brake pressure - no problem - just hit the brake pedal and the unique one-way valve puts additional pressure through to the wheel cylinder side."

Last edited by davesdartgt; 06/03/09 09:44 PM.
Re: Line Locks locking out rear wheels [Re: davesdartgt] #336353
06/03/09 10:34 PM
06/03/09 10:34 PM
Joined: May 2005
Posts: 1,989
Apollo, PA.
B1MAXX Offline
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I have two line locks one plummbed into the front and one plummbed into the rear. There is a switch on the dash for setting only the front for for burn outs and when switched it sets both line locks and a two step. My rear line lock is plummbed the same way as the front and I have never had any problems.

Re: Line Locks locking out rear wheels [Re: B1MAXX] #336354
06/04/09 02:36 PM
06/04/09 02:36 PM
Joined: Jan 2003
Posts: 549
Bristol, Va
fasteddie Offline
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Some tracks prohibit line locks on the rear wheels.

Personally, I would not put a line lock on backwards to lock out the rear wheels. It is not designed for that and may cause unknown problems.

Mine is installed as per the instructions on the fronts after the proportioning valve.

Momentary button is on the shifter. I push the button, pump the brakes hard, and do my burnout. Been on the car for about 17 years and still working perfect.


2003 Bristol Dragway Sportsman Champion

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Re: Line Locks locking out rear wheels [Re: B1MAXX] #336355
08/03/09 07:51 PM
08/03/09 07:51 PM
Joined: Sep 2007
Posts: 876
Arizona
PolyDart Offline
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Arizona
Quote:

I have two line locks one plummbed into the front and one plummbed into the rear. There is a switch on the dash for setting only the front for for burn outs and when switched it sets both line locks and a two step. My rear line lock is plummbed the same way as the front and I have never had any problems.




Is you rear unit plumbed "normal" or "backwards" as others have mentioned?

I have a Hurst unit I want to use to lock out my rear brakes. I'm plumbing it now, and figured I should hook it up as normal with the M/C going to the IN port of the line lock.

Re: Line Locks locking out rear wheels [Re: PolyDart] #336356
08/04/09 10:41 AM
08/04/09 10:41 AM
Joined: Sep 2007
Posts: 876
Arizona
PolyDart Offline
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Arizona
Bump...

Re: Line Locks locking out rear wheels [Re: PolyDart] #336357
08/04/09 12:28 PM
08/04/09 12:28 PM
Joined: May 2005
Posts: 1,989
Apollo, PA.
B1MAXX Offline
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I'll look to be sure. I'll post back later

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