Drag Racing Technique Improve your track times

Line lock on rear brakes

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Old Oct 28, 2003 | 09:05 PM
  #1  
Prorac1's Avatar
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From: Martin Mi
Line lock on rear brakes

Has anyone here ever put a line lock on the rear brakes to pull double duty as a line lock and a staging control. Thanks Prorac1
Old Oct 29, 2003 | 05:36 AM
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Am I missing something? You've got an auto...what would be the point?
Old Oct 29, 2003 | 06:26 AM
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4-wheel line loc= poor mans trans brake...

You really want to check the rules at your local track before you go through the effort...
Old Oct 29, 2003 | 06:50 AM
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Originally posted by tnthub
4-wheel line loc= poor mans trans brake...

You really want to check the rules at your local track before you go through the effort...

A definate no-no for the Steet and Heavy classes at my track. Does make the car easier to launch. Track officials don't let you "launch" off a button and made the guy next to me remove it "at once". This was in the 3rd round and midway thru the season.
Old Oct 29, 2003 | 07:10 AM
  #5  
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Originally posted by tnthub
4-wheel line loc= poor mans trans brake...

You really want to check the rules at your local track before you go through the effort...
Okay, I thought of that, but knew tracks around here wouldn't allow it - as kazman said, "Track officials [won't] let you "launch" off a button..." unless you're running in Pro class brackets. Couldn't think of another reason.
Old Oct 29, 2003 | 08:22 AM
  #6  
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But they will let you launch off handicap controls....
Old Oct 29, 2003 | 11:04 AM
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Originally posted by tnthub
But they will let you launch off handicap controls....
Good point - if you're hadicapped, but I don't think I'll go there
Old Oct 29, 2003 | 12:51 PM
  #8  
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From: Martin Mi
i dont bracket race the car except at special events such as m8 etc. i was thinking of trying to do it with one on the rear instead of two. you really dont need a front one. A line lock does exactally what the name inplies, it locks the line. It can push the fluid to the calipers and than close the line (As in a front line lock) or it can be used to close the line to the rear brakes before the pedal is pushed to hold fluid away from the calipers. The main reason im thinkin this is not to make it easier to do a burn out. but to make life easier on my parts (i.e. brakes, posi unit, etc) im just afraid that with to many burnouts with the rear brakes applied im putting more load on one axel more that the other.( cause theres no telling if both calipers are holding at EXACTALLY the same pressure.) and thats going to put a lot of undew stress on the clutches in the posi. Just an off handed idea. thanks for the input. prorac1. Oh, and p.s. if you wire it to your horn button, theres little to no way the starter will see you launching off a button.
Old Oct 29, 2003 | 03:12 PM
  #9  
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At my track, line locks are specified on non-drive wheels only. On test and tune nights nobody cares, but if you run in a series or at points meets you had better not chance it.
Old Oct 30, 2003 | 05:24 PM
  #10  
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Originally posted by Prorac1
... or it can be used to close the line to the rear brakes before the pedal is pushed to hold fluid away from the calipers. The main reason im thinkin this is not to make it easier to do a burn out. but to make life easier on my parts ...
Call me dumb ... but isn't that the point of a front wheel line lock ... not so much as to make it easier to do a burn out, but elminate any pressure on the rear brakes ... it sounds like you're just trying to revesre the process - push the button first and lock the fluid out from the rear brakes, then push down on the brake pedal to lock up the front brakes
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