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#1
25th September 2014, 12:34 AM
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brakes
Took my car for a shake down run tonight (in the dark) with my mate. Everything went really well apart from the brakes kept binding on. I had to stop on 3 occasions to let the brakes cool down/release. It seems to be the rears. I had already backed off the handbrake to the point where this doesn't work so I know its not that causing the problem.
I have an inline pressure switch to activate the brake lights and when the brakes are locked on the brake lights remain on? Has anyone got any suggestions? Cheers David p.s my car has now done 10 miles!!!
__________________
Click to see my build photos on Flikr http://www.flickr.com/photos/67112582@N03/ Saturn MX5 Based Chassis, Limited Slip Diff & 2.4 Quick Rack. Build cost.... seems to be spending more on tools than car bits at the moment! (they will be handy in the future though). Car iva'd and passed 15/08/2014. Finished weight 572kg. 
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#2
25th September 2014, 08:59 AM
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Do you have a brake proportioning valve of some kind? Is the pressure switch on the rear line after this? It could be sticking and not releasing pressure back to the master cylinder.
Cheers Stot
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1.6 Mazda B6 : Garrett TBO339 : 420cc WRX Injectors : FMIC : Microsquirt V3 : LC-2 Wideband : Toyota COP : 1.8 ATB LSD Build Started Jan 2013 : OTR Aug 2014 : Still OTR June 2024
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#3
25th September 2014, 09:20 AM
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Quote:
David
__________________
Click to see my build photos on Flikr http://www.flickr.com/photos/67112582@N03/ Saturn MX5 Based Chassis, Limited Slip Diff & 2.4 Quick Rack. Build cost.... seems to be spending more on tools than car bits at the moment! (they will be handy in the future though). Car iva'd and passed 15/08/2014. Finished weight 572kg.
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#4
25th September 2014, 09:53 AM
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If pressure is remaining in the circuit the piston in the master cannot be returning fully. So it can only be brake master related, this could be a piston sticking or the brake pedal not allowing it to return .
Bob
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When The Results Disagree With The Theory: Believe The Results And Invent A New Theory If I had two brains I,d still be a halfwit The cave http://s1116.photobucket.com/user/my...deshow/mancave The build http://www.haynes.co.uk/forums/showthread.php?t=12669
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#5
25th September 2014, 10:02 AM
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Hi David,
How did you adjust the master-cylinder push-rod/clevis assembly? How did you adjust the brake pedal position? Sometimes, after having adjusted the brake pedal stroke and position, there may be apply a pressure applied on the master-cylinder, even when the brake pedal is released. Not enough to lock the brakes when cold, but it makes the all system heating up, and can lead to a break locking after a while (and even a brake loss if overheating). So perhaps you should try to momentary put your brake pedal as far back at possible (completely released with no pressure on the M/C), even if it is not comfortable, but just for checking if you still have this brake locking problem in these conditions (when you are sure the pedal is not applying any pressure on the M/C when released).
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Sylvain Pictures of my completed Roadster https://www.flickr.com/photos/994983...7646799525542/ Build blog: http://vouchtroadster.blogspot.se/ https://cafrazx550.blogspot.com/
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#6
25th September 2014, 10:03 AM
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Quote:
__________________
Sylvain Pictures of my completed Roadster https://www.flickr.com/photos/994983...7646799525542/ Build blog: http://vouchtroadster.blogspot.se/ https://cafrazx550.blogspot.com/
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#8
25th September 2014, 11:36 AM
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I will have a look at both the pivot and make sure the bar isn't too long. I did get some nice photos though in Newcastle by night!
Everyone seemed to like it Thanks for the help David
__________________
Click to see my build photos on Flikr http://www.flickr.com/photos/67112582@N03/ Saturn MX5 Based Chassis, Limited Slip Diff & 2.4 Quick Rack. Build cost.... seems to be spending more on tools than car bits at the moment! (they will be handy in the future though). Car iva'd and passed 15/08/2014. Finished weight 572kg.
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#9
25th September 2014, 01:31 PM
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The other symptom is the brake gets really hard
David
__________________
Click to see my build photos on Flikr http://www.flickr.com/photos/67112582@N03/ Saturn MX5 Based Chassis, Limited Slip Diff & 2.4 Quick Rack. Build cost.... seems to be spending more on tools than car bits at the moment! (they will be handy in the future though). Car iva'd and passed 15/08/2014. Finished weight 572kg.
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#10
27th September 2014, 07:47 PM
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Front brake hoses cause problems like you descr
ibe if they are original
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Cost : Little as possible. Thanks : To those who by their generosity my build has progressed. Its a handmade sports car not a flaming kit car !!! If at first you dont succeed,avoid skydiving... No parachute require to freefall,only if you want to do it twice.
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