Line Locks Revisited

Philip Saran · 05-22-2009, 06:24 PM

OK, I already know how to plumb the line lock, but my question is
how many of you use it to lock the front brakes vs deactivating the
rear brakes for your burn out and why did you choose that option??

Dragsinger · 05-23-2009, 06:36 AM

this is a new method to me, never heard of "blocking" the rear? How, why would that be done?

Kegracing · 05-23-2009, 07:48 AM

OK, just taking a guess here, have not tried this, but kind of interesting.

I am guessing they are using the solenoid to block pressure from rear brakes when button is pushed. This would allow you to use or drag front brakes to do a rolling burnout... not sure why you would do this unless in a class you could burnout out over the line, or you were just doing a show or burnout contest type deal...

Is this the set up you are discussing and can I ask why?

Ken

Chris DeGidio · 05-23-2009, 11:22 AM

We've always installed it to lock the front brakes.

Rob Petrie E395 · 05-23-2009, 11:54 AM

One other thing to think about on this. If you block the line going to the rear brakes with a line lock solonoid the piston in the master cylinder is not going to want to move since the fluid in the line would build pressure very fast with little pedal movement, therefore making it very hard to build pressure in the front brakes. Also if you can build pressure you would have to hold your foot on the brake pedal during the burnout to maintain it. If you want to do a rolling burnout why not just set the brake pressure lower with the line lock on the front (ie if you usually set it at 800 just use 400 or whatever works for you) so the car will still roll a little bit when it comes out of the water box.

Philip Saran · 05-23-2009, 08:21 PM

Thanks for the comments. I have always seen it done the "normal"
way of locking the front brakes.

But Bob Mazzolini recommends using it to lock out the rears so
you can do your burn out and just use the brake pedal to control
speed with the front brakes. This is how he has his SS/AH car
set up.

George Mirza · 05-23-2009, 08:58 PM

I could be wrong on this, but wasn't the line loc originally designed to hold stick shift cars from rolling on the starting line by holding pressure to the front brakes.

Phil stick to using them on the front, who knows what kind of exotic brake setup that AH car could have on it.

Philip Saran · 05-23-2009, 09:53 PM

George that is exactly what I'm going to do.

But I have seen Mazzolini's Hemi Cuda up on the lift and the line lock is plumbed
in the brake line running to the rear. I guess he uses it so the rears are unlocked
and you just do a burn out and then stop with the front brakes.

Mine will be plumbed for the fronts only.

mike natoli · 05-26-2009, 07:22 AM

very interesting... look like a pro stocker doing a burn through very cool... SS/AH cars can go past the starting line on their burn out? Or is this when they are just competing in the Hemi challenge?

M Cotten · 05-26-2009, 08:18 AM

I was told at a teardown years ago in Memphis that is illegal to have the line loc on the rear brakes. Even though I was using it as you described Phil, I believe the concern was that people would lock the rear wheels when staging and leave by releasing the button..

Mike

05-22-2009, 06:24 PM	#1
Philip Saran Senior Member Join Date: Oct 2006 Location: Parker, CO. Posts: 728 Likes: 165 Liked 14 Times in 11 Posts	Line Locks Revisited OK, I already know how to plumb the line lock, but my question is how many of you use it to lock the front brakes vs deactivating the rear brakes for your burn out and why did you choose that option?? __________________ Phil Saran Parker, Colorado

05-23-2009, 06:36 AM	#2
Dragsinger VIP Member Join Date: Jul 2008 Location: Liberty City [East Texas] Posts: 1,760 Likes: 5 Liked 99 Times in 60 Posts	Re: Line Locks Revisited this is a new method to me, never heard of "blocking" the rear? How, why would that be done? __________________ Larry Woodfin 471W

05-23-2009, 07:48 AM	#3
Kegracing Member Join Date: Jun 2002 Location: Red Oak, TX Posts: 441 Likes: 0 Liked 0 Times in 0 Posts	Re: Line Locks Revisited OK, just taking a guess here, have not tried this, but kind of interesting. I am guessing they are using the solenoid to block pressure from rear brakes when button is pushed. This would allow you to use or drag front brakes to do a rolling burnout... not sure why you would do this unless in a class you could burnout out over the line, or you were just doing a show or burnout contest type deal... Is this the set up you are discussing and can I ask why? Ken

05-23-2009, 11:22 AM	#4
Chris DeGidio Member Join Date: Jun 2007 Posts: 364 Likes: 8 Liked 2 Times in 2 Posts	Re: Line Locks Revisited We've always installed it to lock the front brakes. __________________ Nautilus Racing

05-23-2009, 11:54 AM	#5
Rob Petrie E395 VIP Member Join Date: Dec 2007 Location: Woodlawn IL Posts: 1,092 Likes: 162 Liked 216 Times in 77 Posts	Re: Line Locks Revisited One other thing to think about on this. If you block the line going to the rear brakes with a line lock solonoid the piston in the master cylinder is not going to want to move since the fluid in the line would build pressure very fast with little pedal movement, therefore making it very hard to build pressure in the front brakes. Also if you can build pressure you would have to hold your foot on the brake pedal during the burnout to maintain it. If you want to do a rolling burnout why not just set the brake pressure lower with the line lock on the front (ie if you usually set it at 800 just use 400 or whatever works for you) so the car will still roll a little bit when it comes out of the water box.

05-23-2009, 08:21 PM	#6
Philip Saran Senior Member Join Date: Oct 2006 Location: Parker, CO. Posts: 728 Likes: 165 Liked 14 Times in 11 Posts	Re: Line Locks Revisited Thanks for the comments. I have always seen it done the "normal" way of locking the front brakes. But Bob Mazzolini recommends using it to lock out the rears so you can do your burn out and just use the brake pedal to control speed with the front brakes. This is how he has his SS/AH car set up. __________________ Phil Saran Parker, Colorado

05-23-2009, 08:58 PM	#7
George Mirza Senior Member Join Date: Jan 2002 Location: North Attleborough Ma. Posts: 522 Likes: 0 Liked 0 Times in 0 Posts	Re: Line Locks Revisited I could be wrong on this, but wasn't the line loc originally designed to hold stick shift cars from rolling on the starting line by holding pressure to the front brakes. Phil stick to using them on the front, who knows what kind of exotic brake setup that AH car could have on it.

05-23-2009, 09:53 PM	#8
Philip Saran Senior Member Join Date: Oct 2006 Location: Parker, CO. Posts: 728 Likes: 165 Liked 14 Times in 11 Posts	Re: Line Locks Revisited George that is exactly what I'm going to do. But I have seen Mazzolini's Hemi Cuda up on the lift and the line lock is plumbed in the brake line running to the rear. I guess he uses it so the rears are unlocked and you just do a burn out and then stop with the front brakes. Mine will be plumbed for the fronts only. __________________ Phil Saran Parker, Colorado

05-26-2009, 07:22 AM	#9
mike natoli Member Join Date: Mar 2007 Location: Valley Stream mini Gasoline Alley & Div I Posts: 100 Likes: 25 Liked 51 Times in 16 Posts	Re: Line Locks Revisited very interesting... look like a pro stocker doing a burn through very cool... SS/AH cars can go past the starting line on their burn out? Or is this when they are just competing in the Hemi challenge?

05-26-2009, 08:18 AM	#10
M Cotten Junior Member Join Date: Jun 2007 Posts: 66 Likes: 0 Liked 0 Times in 0 Posts	Re: Line Locks Revisited I was told at a teardown years ago in Memphis that is illegal to have the line loc on the rear brakes. Even though I was using it as you described Phil, I believe the concern was that people would lock the rear wheels when staging and leave by releasing the button.. Mike