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Author
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Topic: Brake line fittings for line lock installation
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afret
Gearhead Posts: 243
From: Lancaster, CA
Registered: Feb 2003
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posted 04-01-2003 12:34 AM
 
I'm working on installing my line lock and having a problem.  I even got the installation kit from Summit which isn't much help. I can't use any of the adapters in the kit and all the auto parts stores I checked didn't have what I needed. All the brake lines on my 69 Mustang which has front discs are 3/16 but the tube nuts are all different sizes on the brake distribution block. The common size tube nut on a 3/16 line seems to be 3/8. The fittings for the front brake lines seem to be 7/16. The only 3/8 fitting on the brake distribution block is for the rear brakes. I think that is the only place I can hook the line like up to unless I can find adapters and even adapter unions to connect 7/16 and 3/8 fittings. somewhere. I know the line lock solenoid is a one way valve so even with it energized you can still pump more pressure to the brakes. To use it on the rear brakes for only doing burnouts since the car is an auto, I'll have to reverse the in and out ports on the solenoid to keep pressure away from the rear brakes while pressing the brake pedal during a burnout. Otherwise even with it energized the rear brakes will get pressure. Do guys think there might be some problem with hooking it up this way? Thanks for any advice or info. 
Earl
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Moneymaker
Administrator Posts: 29200
From: Lyons, IL, USA
Registered: May 99
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posted 04-01-2003 01:41 AM
The inverted flare adapter fittings you need are very common. Even dumb parts stores like Pep Boys have them. The problem is the stupid help they have working there don't know where to look. They are usually hanging up in the fitting aisle in a bubble package.
Option 2:
Open up you Yellow Pages and find an industrial hardware supply store and see if the have 3/16 to 1/4 inverted flare brass or steel adapter fittings.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Rory McNeil
Gearhead Posts: 1889
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 04-01-2003 02:54 AM
I feel your pain, I just converted my 85 Mustang from power to manual brake, and also installed a line lock too. I would assume that the reason that Ford used all these oddball fitting sizes was to prevent mixups on the assembly line. When I switched to the manual brakes, I used the brake distribution block that came from the same man. brake car (79 Mustang). Several of the tube nuts were different sizes than the power brakes distribution block, requiring either adapters, or flaring the new tubing yourself, using the old tube nuts. I have installed several line ocks in Fords before, & I ALWAYS end up making at Least 3 trips to the Weatherhead bins at the local parts store.As Alex said, a well equipped parts store should have what you need in stock. ------------------
78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA Stocker under construction, 302 5 speed
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd
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afret
Gearhead Posts: 243
From: Lancaster, CA
Registered: Feb 2003
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posted 04-01-2003 10:48 AM
Thanks Rory and Alex for the info. I posted the question to the TCI tech line (they make a Roll Stop which is about the same as the Hurst Roll Control). They said that you can run the solenoid to the back brakes with the solenoid on backwards to block pressure to the back brakes with no problem. I even tested my solenoid to make sure fluid flows backwards with the solenoid open. Seems like a lot of the adapters for larger tube nuts are made for larger tubes so they won't work.  You're right Rory I'd have to cut and reflare using the stock tube nuts. I have a double flaring kit but have no ability to make a good flare so I think I will just hook it up to the rear brakes. I'm glad at least this option is available. I also ordered a manual master cylinder (which should get here later this week and have removed my booster. It's nice to have more room and will be able to go back to a more rumpety rump cam whenever I want.  Thanks again.
Earl[This message has been edited by afret (edited 04-01-2003).]
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capri man
Gearhead Posts: 8777
From: doerun, ga.
Registered: Nov 2000
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posted 04-01-2003 10:59 AM
afret, just keep in mind that if you are going to race nhra or ihra, the linelock MUST be connected to the NON DRIVE wheels. good luck------------------
mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141
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Rory McNeil
Gearhead Posts: 1889
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 04-01-2003 12:58 PM
I`ve never heard of using a line lock type unit being used to prevent pressure from going to the rear wheels, sounds kinda odd. As for adapters for using the various tube nut sizes, I`ve never had an application where Weatherhead did not make what I needed. As for converting to manual brakes, thats fine, but make sure you also get a manual brake pedal, as the pivot point is different, to give added leverage, otherwise the pedal effort will be very high.------------------
78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA Stocker under construction, 302 5 speed
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd
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Bob Hopkins
Gearhead Posts: 362
From: BRIDGEPORT NJ USA
Registered: Jan 2001
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posted 04-02-2003 10:36 AM
If you install it on rear line to prevent pressure to rear brakes what is going to hold presure on front brakes to hold car still???? You need it on front brake system!!1
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afret
Gearhead Posts: 243
From: Lancaster, CA
Registered: Feb 2003
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posted 04-02-2003 11:00 AM
Actually it is an auto trans and I plan on just using the line lock to heat the tires. I can use the brake pedal to engage the front brakes with the rear brakes out of the circuit with the line lock on. If the tech inspectors at the strip give me a hard time about the connection to the rear brake from what Mike R said, I can just disconnect the thing and go back to wearing out my rear brake shoes.
Thanks for the tip on the brake pedal, Rory. I already had a manual pedal which I got years ago from a pick your part wrecking yard years ago when old cars were common.  What surprised me was that the tech guy at TCI said that the use of the unit on the rear brakes was pretty common.
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