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Line Lock - manual vs soleniod

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Wed Aug 09, 2017 5:52 am PostPost subject: Line Lock - manual vs soleniod
AK
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SO.... weight saving thoughts.

I want to bin all the OE handbrake mech from the Impreza and go with a simple line-lock to the rear wheels.

On the white one i went for a hydraulic handbrake... but just though it a bit pointless once the novelty wore off.

Manual - cheap & simple BUT not really quick to release off the line. I.e starting at KH on the hill and need to stop rollign back without using clutch.

Solenoid release - can have button on wheel perhaps to 'open' the rear circuit... BUT i would be worried about making a cock up and 'locking' the rear (either open or pressured) with a stray button press mid race Laughing


Anyone car to offer their thoughts, setups and real world experience?
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Wed Aug 09, 2017 7:02 am PostPost subject:
foz01
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Having left my line lock on and wondered why the braking was absolutely terrible, the simpler the better, and hence I wouldn't even consider a solenoid! You live and learn but a simple mechanical lock is the way to go IMO

Modern electronic handbrakes are a P.I.T.A!
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Wed Aug 09, 2017 7:26 am PostPost subject:
HummuH
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I run a line lock, which is out of arms reach, which I think is as per MSA regs.

It's a bit of a faff as you can't use it unless your harnesses are off. For example, on a start grid, particularly at Knockhill, you have to sit with your foot on the brakes for quite a while which can be quite uncomfortable and not great if you just spent a lap getting heat in the brakes.
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Wed Aug 09, 2017 8:04 am PostPost subject:
James B
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I remember reading somewhere of someone retro-fitting a hill-hold system to their track/race car for just this reason. I can't for the life of me remember where i saw it though; probably Pistonheads or linked from a thread there in some manner.
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Wed Aug 09, 2017 9:12 am PostPost subject:
AK
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will search.... as I seem to remember that topic now
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Wed Aug 09, 2017 9:16 am PostPost subject:
AK
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bosh - http://trackscotland.co.uk/forums/viewtopic.php?t=7563&highlight=solenoid
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Wed Aug 09, 2017 9:29 am PostPost subject:
AK
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http://www.jegs.com/p/Hurst/Hurst-Roll-Control-Kits/745801/10002/-1
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Wed Aug 09, 2017 9:31 am PostPost subject:
AK
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hmmm...

I do also want the ability to lock/unlock the wheels without the car powered though... so ... that kinda rules that out!

Bit of a PITA if you have to power the car to free up a 'handbrake' all the time
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Wed Aug 09, 2017 9:35 am PostPost subject:
AK
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~40 and simple.

http://www.demon-tweeks.co.uk/motorsport/hydraulic-handbrakes/automotive-plumbing-solutions-line-lock

Would need to mount 'out of reach' to keep Renny and co. happy Very Happy
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Wed Aug 09, 2017 12:37 pm PostPost subject:
scottish scrutineer
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AK wrote:
~40 and simple.

http://www.demon-tweeks.co.uk/motorsport/hydraulic-handbrakes/automotive-plumbing-solutions-line-lock

Would need to mount 'out of reach' to keep Renny and co. happy Very Happy

If it is out of reach, how are you going to operate it? Confused

Just qualify further up the grid, apparently its flatter there Laughing
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Wed Aug 09, 2017 12:41 pm PostPost subject:
HummuH
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scottish scrutineer wrote:
AK wrote:
~40 and simple.

http://www.demon-tweeks.co.uk/motorsport/hydraulic-handbrakes/automotive-plumbing-solutions-line-lock

Would need to mount 'out of reach' to keep Renny and co. happy Very Happy

If it is out of reach, how are you going to operate it? Confused

Just qualify further up the grid, apparently its flatter there Laughing


Not flat enough to keep your foot off the brake pedal though!
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Thu Aug 10, 2017 4:33 am PostPost subject:
AK
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Renny - I'm not perhaps meaning literally ... but meaning sufficiently out of the way as to not mistakenly pull on the level for no reason mid race.

I.e stretching point when buckled up...

My main reason is weight saving... and the main reason for wanting a line-lock over having nothing is the ability to still retain a brake lock if needed.
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Thu Aug 10, 2017 10:09 am PostPost subject:
Steve H
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AK wrote:

My main reason is weight saving...


How much does a handbrake weigh? Is it worth the effort?
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Thu Aug 10, 2017 11:15 am PostPost subject:
AK
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good few KG in all the mechanism and cables.

I did weigh the difference between OE handbrake and hydraulic level on the white car - but cant remember Laughing
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Mon Aug 14, 2017 11:06 am PostPost subject:
Ali M
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I had one in the golf (same type as in the link above) but it would not pass scruitenering for some reason

It was mounted on the centre panel and I could reach it so that it was used to stop rolling back off the line. Now removed and have a hydraulic handbrake lever instead.
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