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Topic: Line Lock/Master Cyclinder (Read 704 times)
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CA Duster 383
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My 74 Duster 383 with Hooker Supercomp fenderwell 1-7/8" headers
is ready for the new M/C and the line lock.
My headers run right under the M/C and it is necessary to pull the M/C
to remove the left header.
I have the 2 bolt heat shield for under the late model M/C and I want
to mount the line lock to the left on the firewall.
So my question is....must I use hard lines to connect the two or can I
have S/S flex lines made up for this??
Open to all comments and opinions.
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Phil Saran
74 Duster 383
Fullerton, CA
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bOb shingler
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you can go either way but you can also purchase the ss lines already made.
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"bOb Built" (no matter how many times it takes)  |
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tubtar
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This was during mock up , but it is legal and works.
A heat shield would be good , I jacket the lines where they run from m.c. to proportioning valve.
Earl's has them pre made.
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Logged
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It's a fine line between " how much ? " and " Why the hell not ? "
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CA Duster 383
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Tubtar,
Thank you for the photo, that is what I have been looking for, now I can
order some lines or have them made up.
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Phil Saran
74 Duster 383
Fullerton, CA
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Capt Jack
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ok, so...just so I understand...I thought the line lock was supposed to be AFTER the proportioning valve.
admittedly, most locks Ive seen are not, but every 'written instruction' I can find says place it after.
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tubtar
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An adjustable valve can be on either side I would imagine , since it is just limiting pressure to one end of the car ........maybe I should have read the instructions ? It seems to work fine.........did on my last car too. Good point though........... I just copied what I saw with other cars. |
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Logged
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It's a fine line between " how much ? " and " Why the hell not ? "
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nasty68
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My last car the line lock was right after the master and before the proportioning valve and never had any problems with it at all. This car i have no valve in the front brake system, just the rear brakes has it.
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Logged
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68 dart, 383, 727
97 wrangler sport, 4.0
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Capt Jack
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kewl. I'll give it a shot that way.....I mean, what have I got to lose, right? theyre just brakes  |
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CA Duster 383
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The proportioning valve has to do with front to back balance of the braking function.
A line lock has to do with locking either the front or rear brakes when doing a burn out.
I have always seen line locks plumbed at the M/C, not down line after the proportioning valve.
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Phil Saran
74 Duster 383
Fullerton, CA
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coors00
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I agree, between the m/c and valve; at least that's what all the instructions(that work) say.
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oldkimmer
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...........Read the NHRA rule book..............kim........
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MR. Mechanic...........Panther Pink Duster The Beast has been Unleashed!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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A13Dart
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What's your take on the rulebook Kim ?
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Capt Jack
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this is what I found: BRAKES & SUSPENSION: 3
3.1 BRAKES
......If brake system includes a differential pressure switch, line-lock installed on front brakes must have solenoid installed after the differential switch. All line-locks (electric or hydraulic) must be self returning to normal brake operating mode. so, if I read this right, its 'after' the proportioning valve ie: "differential switch"? |
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coors00
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Kim's right; I thought mine was between, but just looked, and it is after the valve.\
But after reading the link Capt Jack put up- I think, depending on the year; some valves are not "differential", only shut off the leaky end.
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Capt Jack
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I think youre right. the coronet has a single res MC...both sets of locks plumb right off the MC and theres no valving system
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coors00
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Another argument at tech inspection...On a70, I installed it after, but thought I had installed it between, and have been saying between. sigh. old age.
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A13Dart
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I sent an email to the NHRA technical department about a year ago regarding general regulations 3:1 line lock installation:
Hi Jim,
Can I install the line lock solenoid between the master cylinder and the factory distribution block on my 68 Dodge Dart?
I would prefer to leave the factory front brake lines and fittings intact as much as possible.
General regulation 3:1 refers to a pressure differential switch. I am not sure if this applies to my application.
Thanks,
Mike.
Hi Mike,
Does the 68 use a dual reservoir master cylinder? Can’t remember when they switched. If so, yes, you can put it between the master and block, on the front brakes. Conversely, if you have just a single reservoir master, you’ll have no choice but to replumb the front brakes for the line-loc; otherwise you’d have a four-wheel line loc.
Let me know it that helps.
Jim
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coors00
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That nhra answer muddied the waters.
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Capt Jack
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oh wow. well at least that explains how so many with it plumbed that way get through tech. in my case that would really make life a lot easier being able to do it between the MC and the block....thanks a ton for that!  |
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braided brakes 010.jpg
