Posted By: kjg
Line Locks locking out rear wheels - 06/02/09 10:30 PM
I was told that with an automatic trans that you should lock out the rear wheel anyone doing that and why?
Line Locks locking out rear wheels
Posted By: Frito
Re: Line Locks locking out rear wheels - 06/02/09 10:33 PM
Huh!! 
Posted By: enelson
Re: Line Locks locking out rear wheels - 06/02/09 10:49 PM
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.
Thats the only way I've heard of people using em with rwd cars on the rear.
Posted By: G_bob
Re: Line Locks locking out rear wheels - 06/02/09 11:38 PM
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.
Posted By: Ron Silva
Re: Line Locks locking out rear wheels - 06/02/09 11:55 PM
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??
What do you think a FWD car does??
Posted By: enelson
Re: Line Locks locking out rear wheels - 06/03/09 12:29 AM
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.
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.
Posted By: bill_greenwood
Re: Line Locks locking out rear wheels - 06/03/09 05:54 AM
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.
Posted By: d7cook
Re: Line Locks locking out rear wheels - 06/03/09 05:06 PM
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.
Posted By: Ron Silva
Re: Line Locks locking out rear wheels - 06/03/09 05:39 PM
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.
This will make sure you will have rear brakes at the end of the quarter mile.
Posted By: Azzkikrcuda
Re: Line Locks locking out rear wheels - 06/03/09 05:40 PM
That is how mine is set up, works great.
Posted By: G_bob
Re: Line Locks locking out rear wheels - 06/03/09 08:23 PM
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.
Posted By: Challenger 1
Re: Line Locks locking out rear wheels - 06/03/09 09:01 PM
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.
Posted By: G_bob
Re: Line Locks locking out rear wheels - 06/03/09 09:57 PM
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.
Posted By: Challenger 1
Re: Line Locks locking out rear wheels - 06/03/09 10:24 PM
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.
Posted By: davesdartgt
Re: Line Locks locking out rear wheels - 06/04/09 01:22 AM
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."
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."
Posted By: B1MAXX
Re: Line Locks locking out rear wheels - 06/04/09 02:34 AM
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.
Posted By: fasteddie
Re: Line Locks locking out rear wheels - 06/04/09 06:36 PM
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.
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.
Posted By: PolyDart
Re: Line Locks locking out rear wheels - 08/03/09 11:51 PM
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.
Posted By: PolyDart
Re: Line Locks locking out rear wheels - 08/04/09 02:41 PM
Bump...
Posted By: B1MAXX
Re: Line Locks locking out rear wheels - 08/04/09 04:28 PM
I'll look to be sure. I'll post back later
Posted By: PolyDart
Re: Line Locks locking out rear wheels - 08/04/09 04:43 PM
Thanks, I appreciate that.
Posted By: B1MAXX
Re: Line Locks locking out rear wheels - 08/05/09 09:14 PM
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.
Posted By: PolyDart
Re: Line Locks locking out rear wheels - 08/05/09 10:27 PM
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
Posted By: 52savoy
Re: Line Locks locking out rear wheels - 08/06/09 04:13 AM
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.
Posted By: 572charger
Re: Line Locks locking out rear wheels - 08/06/09 10:51 AM
my line lock is on the ft brake line commin out of the master cyl. been there for 24yrs works perfect easy to install !!!! 
Posted By: Gavin
Re: Line Locks locking out rear wheels - 08/07/09 09:22 PM
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.
Posted By: PolyDart
Re: Line Locks locking out rear wheels - 08/07/09 10:27 PM
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.
Posted By: Ron Silva
Re: Line Locks locking out rear wheels - 08/07/09 10:47 PM
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.
They are pretty much the same thing as we use.
Posted By: PUNK
Re: Line Locks locking out rear wheels - 08/08/09 02:05 AM
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.
Posted By: 52savoy
Re: Line Locks locking out rear wheels - 08/08/09 03:42 AM
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.
Posted By: B1MAXX
Re: Line Locks locking out rear wheels - 08/09/09 02:50 PM
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.
Posted By: Tig
Re: Line Locks locking out rear wheels - 08/09/09 03:26 PM
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?
Posted By: B1MAXX
Re: Line Locks locking out rear wheels - 08/10/09 04:15 PM
some cars are different but I got over .1 improvement.