Issues after Hydro Install

[FireStorm999]

Hydro installed, bled fine, works fine.

However, ive been told its normal for ages now that when you use the wand, if you press your footbrake it wants to drag the handbrake back down, therefore not being able to use your handbrake and front brake independently.

is there anyway to be able to use the brake in normal driving with all 4 calipers working, then flick a switch and disable the rear brakes on the pedal and only have the rear brakes on the wand and your front brakes still on the pedal?

just a thought as if you want to slow the front of the car while your on the wand, you cant without coming off the wand, or do i just need more man power to hold the wand up?

[Dunkz]

I use the foot brake all the time when using the wand and never have any issues at all. If you've already bled it then go try it out first before worrying about plumbing other stuff in.

[FireStorm999]

I use the foot brake all the time when using the wand and never have any issues at all. If you've already bled it then go try it out first before worrying about plumbing other stuff in.

i have tried it, many many times, just havnt got round to asking the question. since ive had it installed for over 2 yeasr now

when i hit my footbrake it drags my hydro wand down. the wand is plumbed into the rear brake lines from the BMC through the hydro and into the rear calipers. just as DW tell you to do it.

ive installed hardlines too, not braided.

[Dunkz]

I see, I thought you meant you hadn't tried it and you were checking before hand. Mines in on hard lines, z32 rears, s14 fronts. My brake pedal loses all feeling the moment you touch the wand but I really dont recall the handle snap back effect ever effecting me from using both at the same time. How hard are you hitting the brakes?

[FireStorm999]

Hard or soft, pressure on the footpedal creates a downwards force on my hydro the more you press the footbrake the more the hydro wants to return to stock position. i could probably hold both at the same time with some man power, but its a bit offputting and im unsure exactly whats happening when im doing that. is the pedal just forcing fluid into the hydro cylinder which is already forcing fluid into the rear calipers?

i have r32 GTR brakes F + R and no stock handbrake, just hyrdo.

[Dunkz]

Yep, basically just the fluid trying to push the piston back out again. Just been watching one of my onboard vids to see if its obvious, I have a long hydro handle and when your on track the return force compared to the leverage on the hydro makes it un noticeable, so much so I'd forgotten it even happens.

You could run a second caliper setup so its completly seperate from the brakes. Think DB power might sell one?

[Munkul]

Hard or soft, pressure on the footpedal creates a downwards force on my hydro the more you press the footbrake the more the hydro wants to return to stock position. i could probably hold both at the same time with some man power, but its a bit offputting and im unsure exactly whats happening when im doing that. is the pedal just forcing fluid into the hydro cylinder which is already forcing fluid into the rear calipers?

the hydro piston has to travel a little way before blocking the inlet port (which isolates the front brakes from the back. If the piston hasnt travelled fully past this position (ie you havent pulled it far enough), then the footbrake pressure will still travel through the inlet and force the piston back up.

This can be worsened with a cheap master cylinder too.

Also make sure there is no preload on the piston - at rest the piston must be fully out. Otherwise it can exacerbate problems like this.

[Maxdrift]

I have the exact same problem.

If I pull the hydro then try and push my brakes it forces the hydro back up. But i think I got the lines on the wrong way?

I got a pipe going from bmc to the front of the hydro, then the rear of the hydro to the t peice is that wright?

I know what you been about being scared to pull and push at the same time as it feels like its going break somthing.

[Dunkz]

I got a pipe going from bmc to the front of the hydro, then the rear of the hydro to the t peice is that wright?

Thats back to front. Need to swap them over.

[sparky_s13]

Yep wrong way around max.

I also have this problem (if it is actually a problem, havent been able to test as my car isnt running) but I have GTR brakes all round aswell but with a s13 MC.

Going to upgrade the MC see if that makes a difference, pedal has too much travel anyway due to MC not being good enough for the uprated brakes.

[Sc4mpi]

Stop being a qweer nath. either refit a s13 drum handbrake setup. or run dual rear calipers. iv told you for years your hydro setup is shit :>

[FireStorm999]

Stop being a qweer nath. either refit a s13 drum handbrake setup. or run dual rear calipers. iv told you for years your hydro setup is shit :>

Hydro is awesome when it works properly. Mines always worked properly until i wrote the thing off

[mint]

The one we have in the mx is the same..

[Stavros]

I always thought this was due to the pipes being the wrong way round? Maybe not!

[mint]

Yeah I was the same Stav. However got it checked by a few people.. When you pull the hydro in the 5, then press the footbrake (for arguments sake) the hydro handle will move back to the original place.

If you footbrake BEFORE the hydro then there is more pressure in the hydro handle and seems to lock. Im using a Willwood master cylinder too. Kinda gave up with it if im honest, so many people tried to fix it but meh, just left it.

[gazwhittle]

The hydro on the Mazda does this, it's normal as the brake pressure to the back brakes passes threw the hydro when it's not being yanked so if you pull the hydro and press the foot brake it's just trying to open up the piston on your hydro to let the fluid threw.

But gently pressing the foot brake and yanking the wand makes it easier to lock up.


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[rob_skater]

Yes, this is a peculiar problem, and i am experiencing it too.

sometimes if i apply the foot brake then yank the hydro it locks, and stays locked at the rear untill i then re-apply the foot brake :S

Does anyone have a cure for this?

my hydro is the whole DW setup including lines