Brake problems R33 gtst non abs

[Blakegtst]

Hi guys having major problems with the brakes on my r33 skyline gtst non abs.

There is no leaks at the calipers, master cylinder or anywhere on the brake lines everything is solid.

With the engine off you pump the brakes 3 times they sit high and hard with no pressure drop if you apply consistent pressure (Master Cylinder is 100%)

Once you turn the engine on, the brake pedal drops to half travel if you put a bit of pressure on it and the braking doesnt feel the best. I cannot for the life of me think what is wrong, I have swapped out the master cylinder and brake booster from my friends 33 which has great pedal feel. Has been properly bled 3 times there is literally no bubbles in the system at all.

Manual bleed, vacuum bleed, reverse pressure bled.

Bought 2 metres of clear line and made sure there was no bubbles it is definitely bled right it is driving me crazy.

Thank you.

[HobboR34-GTT]

How worn are your pads and rotors ?

[Blakegtst]

3 minutes ago, HobboR34-GTT said:

How worn are your pads and rotors ?

All brand new, was doing it with the old 60% worn ones but decided to make sure wasnt the issue either.

[blind_elk]

It works fine with your friend's M/C installed?

[Dose Pipe Sutututu]

did you bench bleed it?

[Dobz]

So it’s high and hard before you turn her on, once she’s turned on it drops half way and softens up?

Serious now, have you played around with the pedal adjustment?

[Blakegtst]

9 hours ago, blind_elk said:

It works fine with your friend's M/C installed?

Is the same man, no change. Put mine in his car and its perfect.

[Blakegtst]

4 hours ago, Dose Pipe Sutututu said:

did you bench bleed it?

Yes definitely, no air in master cylinder at all.

[Blakegtst]

1 hour ago, Dobz said:

So it’s high and hard before you turn her on, once she’s turned on it drops half way and softens up?

Serious now, have you played around with the pedal adjustment?

#Brazzers

No haven't played with the pedal adjustment, comparing it to my friends measuring the length of the thread thru the nut on the brake pedal assembly mine sticks out 5.2mm and his is 5.1mm with a bit of error in measurement due to the difficulty of getting the vernier in there it is the same.

If you think it will fix it might give it a shot tonight look up a tutorial now.

[Dobz]

I’m not saying it is the problem but its certainly worth playing with.

[KiwiRS4T]

Put fresh fluid in the system?