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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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Connecticut,usa
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kjg Offline OP
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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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Huh!!

Re: Line Locks locking out rear wheels [Re: kjg] #336340
06/02/09 06:49 PM
06/02/09 06:49 PM
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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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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??


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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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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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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
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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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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.


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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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North Dakota
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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
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Cincinnati, Ohio
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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
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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
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Cincinnati, Ohio
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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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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
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Apollo, PA.
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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
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Bristol, Va
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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.


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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
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Arizona
PolyDart Offline
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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
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Arizona
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Bump...

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

Re: Line Locks locking out rear wheels [Re: B1MAXX] #336358
08/04/09 12:43 PM
08/04/09 12:43 PM
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Arizona
PolyDart Offline
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Thanks, I appreciate that.

Re: Line Locks locking out rear wheels [Re: PolyDart] #336359
08/05/09 05:14 PM
08/05/09 05:14 PM
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Apollo, PA.
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they are plummbed the "normal" way. Both outlets of the master go in one side of the metering block. both lines go out from the metering block into the inlet of the line loc, and from the out to the front/rear brakes.

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Re: Line Locks locking out rear wheels [Re: B1MAXX] #336360
08/05/09 06:27 PM
08/05/09 06:27 PM
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Arizona
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Quote:

they are plummbed the "normal" way. Both outlets of the master go in one side of the metering block. both lines go out from the metering block into the inlet of the line loc, and from the out to the front/rear brakes.




Thanks for checking

Re: Line Locks locking out rear wheels [Re: fasteddie] #336361
08/06/09 12:13 AM
08/06/09 12:13 AM
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Quote:

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.




This is all new to me and it sounds too confusing to mess with at the track..and what is the benefit? I've always installed mine per instructions and getting ready to put the line lock on my Savoy. It will go on the old fashion way unless someone can explain how it's better. Help me understand.
Explain to me from start to finish a burnout with it plumbed that way and how it's safe?

not being sarcastic. just want to know.

Re: Line Locks locking out rear wheels [Re: 52savoy] #336362
08/06/09 06:51 AM
08/06/09 06:51 AM
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my line lock is on the ft brake line commin out of the master cyl. been there for 24yrs works perfect easy to install !!!!


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Re: Line Locks locking out rear wheels [Re: 52savoy] #336363
08/07/09 05:22 PM
08/07/09 05:22 PM
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London, England
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Quote:


This is all new to me and it sounds too confusing to mess with at the track..and what is the benefit? I've always installed mine per instructions and getting ready to put the line lock my Savoy. It will go on the old fashion way unless someone can explain how it's better. Help me understand.
Explain to me from start to finish a burnout with it plumbed that way and how it's safe?

not being sarcastic. just want to know.




As simple to install as the regular way, just reversed and in the rear line. Roll up to water box and switch the linelock on, now you have no rear brakes. Roll into water, apply brakes (only front operate), mash the loud pedal (rears will spin up, no brakes applied) do your stuff and when you want to roll out just modulate the pressure on the brake pedal for a very controllable exit. This is the main advantage. Disengage line lock. Done

Some people claim it makes it easier to leave the line lock switched on and only have front brakes when you get to the top end. Not if you fit a momentary switch like you would for a regular fitting. And even if that did happen (can't see how) you would have plenty of brakes at top end with no risk of swapping ends etc.

When it's prevented by rules then end of argument, but if not I like it and it makes sense to me.

Re: Line Locks locking out rear wheels [Re: Gavin] #336364
08/07/09 06:27 PM
08/07/09 06:27 PM
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Quote:


As simple to install as the regular way, just reversed and in the rear line.




I called Hurst and they said there is no reason to reverse anything for use on the rear brakes. They had no problem with using it on the rear either.

Seems like it should work very well this way. Looking forward to trying it out.

Re: Line Locks locking out rear wheels [Re: PolyDart] #336365
08/07/09 06:47 PM
08/07/09 06:47 PM
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Ron Silva Offline
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There are actually line lock type solinoids marketed for the puropse of BLOCKING the pressure to the brakes. They use them in circle track cars, like sprint cars etc. I think they will actually block the pressure to one wheel on one side of the car to get the car to turn while braking in the dirt

They are pretty much the same thing as we use.


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Re: Line Locks locking out rear wheels [Re: Ron Silva] #336366
08/07/09 10:05 PM
08/07/09 10:05 PM
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We are using the line lock solenoid to block pressure to the rear wheels on my brothers car. Alot of Stock and Super Stock Racers prefer this method also, which is where I first heard about it. I feel like there is more control in the burnout. I actually have the solenoid mounted at the rear of the car so that its not visible under the hood.


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Re: Line Locks locking out rear wheels [Re: Gavin] #336367
08/07/09 11:42 PM
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It makes sense..You don't have to pump up the front brakes anymore either. Definitely need a momentary switch for safety or absent minded old guys.

Re: Line Locks locking out rear wheels [Re: 52savoy] #336368
08/09/09 10:50 AM
08/09/09 10:50 AM
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Apollo, PA.
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The reason I did it was to be able to leave off a 2-step on the floor without a transbrake. Use only one line loc for burn out flip a switch and use two for the launch.

Re: Line Locks locking out rear wheels [Re: B1MAXX] #336369
08/09/09 11:26 AM
08/09/09 11:26 AM
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Quote:

The reason I did it was to be able to leave off a 2-step on the floor without a transbrake. Use only one line loc for burn out flip a switch and use two for the launch.




Sorry to hijack here, I have my line locks wired like you. I've never used it, just launched of the footbrake which will hold up to 3k rpm. Was there a noticable difference in 60ft times?


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Re: Line Locks locking out rear wheels [Re: Tig] #336370
08/10/09 12:15 PM
08/10/09 12:15 PM
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Apollo, PA.
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