Sloan85
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| posted on 30/4/13 at 09:03 PM |
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Brake pressure switch - which way up???
Just thought about something I read some months ago and was wondering whether there was any truth to it?
I have installed the brake pressure Switch with the terminals facing upwards but I read that this can get air trapped and its best the other way up?
You can see how I mounted mine in the photo below. Will it be ok like this or should I change i? It will mean moving bracket up about 30mm but I
could do it before I get the brakes up and running.
Cheers
http://mkindygsxr.blogspot.co.uk
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big-vee-twin
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| posted on 30/4/13 at 09:12 PM |
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Change it, they do trap air, also may hit gearbox in that position.
Just noticed you building a bec so gearbox not an issue
[Edited on 30/4/13 by big-vee-twin]
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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watsonpj
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| posted on 30/4/13 at 09:13 PM |
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Dont know about the air getting trapped but it will work better in the front circuit as there is more braking effort on the front end. I had mine in
the back originally and someone stop me and said my brake lights werent always coming but work fine on front circuit.
Pete
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loggyboy
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| posted on 30/4/13 at 09:17 PM |
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Why not turn it at 90 degrees.
Mistral Motorsport
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wilkingj
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| posted on 30/4/13 at 09:41 PM |
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Yes, mine and a few others started sticking in this (The upright) position.
I suspect the air bubble could allow some minor corrosion (over time) causing it to stick.
Also an air bubble to be compressed on braking makes a less firm pedal, OK only a small amount, but it all adds up.
EDIT:
Just flip it thru 180 degrees, and hang it downwards, just a nut n bolt job, and no new flares or piping work to be done.
Just my 2d's worth.
[Edited on 30/4/2013 by wilkingj]
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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bi22le
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| posted on 30/4/13 at 10:18 PM |
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I have mine with terminals up. Its at the highest point so is used as a method to bleed the line.
Not to sure about the corrosion and sticking story but it may actually be true. I have had to replace my switch once as is stopped being sensitive
enough.
£5 later all fixed and bled.
Track days ARE the best thing since sliced bread, until I get a supercharger that is!
Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1
Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I
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loggyboy
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| posted on 30/4/13 at 10:50 PM |
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quote:
Originally posted by bi22le
I have mine with terminals up. Its at the highest point so is used as a method to bleed the line.
I dont think all air would work its way to the top, most we be trapped in various points so all 4 corners should still be bled when the need arises.
Mistral Motorsport
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rx7locost
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| posted on 1/5/13 at 01:13 PM |
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Your switch location is virtually the same as my MGA's brake switch; very low on the chassis and terminals pointed up. I rebuilt it with all new
hoses hard lines etc, never thinking about trapped air. I never had any soft pedal. I later replaced this switch without having to re-bleed the system
by filling the switch body with fluid before swapping it out. I think you will be just fine.
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