Line locker setup + ABS ??

[savage1987]

Can you fit a line locker setup to a car with ABS? Don't know too much about line lockers but I'm keen for a setup on my VR if it's doable.

Sam

[immortality]

there was an article in street machine about fiting line lockers on late model commodores. apparently the ABS light will come on when it is used (fault code, much like the engine check light) but it resets when you switch the car off and restart again apparently.

they aren't legal on street driven cars..........

[daron]

yes its safe get someone pro to do the plumbing youll be fine

[savage1987]

I know they're not legal on street cars, but who's going to know what they look like? not like I'm going to put a massive label on the switch in the middle of the dash

Expensive to set up??

[daron]

about 250 to get one installed with proper metal lines
wire in ya own swich and away ya go
if you plan to do lots skids its a good investment and saves ya brakes
so many times i see discs glowing red after a good burnout

[Cheap6]

Without thinking too hard about it just yet, and maybe it's not something that savage1987 wants to get into, but surely it would be possible to use the ABS system itself to create the line lock.

Each wheel brake is able to be disconnected during normal ABS operation, so it would also be possible to do that with some electrickery. Could be a line lock for only a few dollars and it would almost certainly be undetectable.

[immortality]

Originally Posted by savage1987

I know they're not legal on street cars, but who's going to know what they look like? not like I'm going to put a massive label on the switch in the middle of the dash

Expensive to set up??

i only put it there for disclaimer purposes i ahve a line locker sitting in the garage as we speak it's not that the switch is obvious but the actual line locker solenoid assembly would be if the car was ever inspected (they are suppose to be installed by the master cylinder). in that way, you guys are very lucky in aussie because you only have the car inspected when you sell it. here in NZ i have to pass a WOF inspection every 6 months. i'm hoping that some more heat shielding around the drivers side exhaust manifold should hide it when it's installed

Originally Posted by Cheap6

Without thinking too hard about it just yet, and maybe it's not something that savage1987 wants to get into, but surely it would be possible to use the ABS system itself to create the line lock.

Each wheel brake is able to be disconnected during normal ABS operation, so it would also be possible to do that with some electrickery. Could be a line lock for only a few dollars and it would almost certainly be undetectable.

it may be possible, however i certainly wouldn't want to dick with the ABS unit and it's associated wiring. it's something that could cause total brake failure if it goes wrong. atleast with the line locker fitted into the rear brake line, should it fail and lockout the rear brakes the front brakes will still work

[Cheap6]

Originally Posted by immortality

it may be possible, however i certainly wouldn't want to dick with the ABS unit and it's associated wiring. it's something that could cause total brake failure if it goes wrong. atleast with the line locker fitted into the rear brake line, should it fail and lockout the rear brakes the front brakes will still work

Yes, there may be safety issues (and the scrutineers at the track may not like it because of that). I still think that it is worth considering for a dual purpose road/track car.

(Temporarily) disconnecting the harness connector at the ABS control module, meaning the solenoids aren't energised, results in the system behaving exactly as does a non-ABS system.

The appropriate solenoids (I think that the VR system is 4 channel, hence the plural) could then be energised using an external controller. Another harness connector cut from a wreck could be used to make the electrical connections.

It would be necessary to figure out which of the solenoids are those for the rear brakes. Doing that is trivial with access to a wiring diagram.

I am not sure what the signals to the solenoids look like. It may be that the ABS solenoid valve 'hold' function (which would isolate the brake caliper associated with it from the master cylinder) is achieved using a signal with a duty cycle. That would have to be measured and matched if that is the case.

Alternatively, the ABS 'dump' function might be used, which is more likey to be either 'on' or 'off', simplifying the control. That would also require the ABS pump motor to be powered though.

Wiring the set up in series with a front wheel speed sensor based frequency switch would allow it to be automatically turned off at anything greater than the slow roll required during the burnout. That is arguably safer than the conventional line lock in that respect (unless a similar switch is used for that too).

[STEALTHY™]

Forget all that. My International has ABS (weren't you just asking about this today, or am i half asleep again?). Never seen a fault code. Mine is plumbed pretty much in line with the middle pillar (under the car obviously), before the lines split for each side. And you can't see it unless your looking for it.


So in conclusion, Line locker with ABS = Fine and no warning light on the dash

[savage1987]

Thanks mate, and yes we were talking about it today

Line locker setup looks like a winner. Especially since Stealthy brought up the fact it can be removed and put into my next car.

Cheers guys, and cheap6 that'd be a fun thing to play around with if you have half a brain with electrics. I unfortunately don't

Sam

[immortality]

Originally Posted by STEALTHY™

Forget all that. My International has ABS (weren't you just asking about this today, or am i half asleep again?). Never seen a fault code. Mine is plumbed pretty much in line with the middle pillar (under the car obviously), before the lines split for each side. And you can't see it unless your looking for it.


So in conclusion, Line locker with ABS = Fine and no warning light on the dash

the one i saw fitted was on a late model (VX i think) and it did show the ABS light when the locker was used. good to know it doens't fault at all on the earlier models.

unfortunatly with the regular 6 monthly inspections here in NZ they would spot the locker as soon as they got under the car (they inspect the brake lines as part of the check).

Cheap6, no doubt using the ABS unti is possible, however it's not something the average joe would or should be playing with. the ABS and it's assocaited wiring and control unit is very much a "black box" that holden wouldn't really release much info about. no doubt you could find the info required as there are service places around that can fix the ABS but not many places would want to get that sort of info intothe public domain because they don't want to loose there custom. the use of a line locker is safe as long as you fit 2 switches in the power circuit so that on/off switch isn't energised all the time allowing for the possible accidental activation of the locker.

[STEALTHY™]

Yeah, thankfully SA doesn't have that. Pretty sure Vic and NSW have yearly ones when you get your rego, but as i told him on msn, just get a hose joiner for the inspection. Thats what i did when my car got defected.