My pedal is very hard and has very little movement from off to on and im a bit worried about driving it this way. Would it matter if i left a bit of air in the system to make it a bit softer or would this lead to braking problems?

!!

you want a situation where you operate the brake pedal and just compress air rather than operate the calipers

no,no no no no.

you want to change you m/c if you want less effort at the pedal.

[Edited on 1/2/10 by cd.thomson]

Alter the pedal ratio or the cylinder sizes, air in the system will lead to brake fade when it gets hot. How do you leave some air in and still have a pedal without needing to pump ?

A bad idea I feel.

You'll very soon get used to the feel. I had a go of a friends Kwaka ZX7 and that had a brake "switch"
but soon adapted.

Ok, glad i checked.

Il leave as is then (new MC is a no, im trying desperately to save money for IVA)

nooooooooooooooooo

all cars vary and you will get used to it

sorry to say i drive citroens with the hydr pnumatic suspension and the high pressure hydraulic system on some models mean there is practically no movement in the pedal at all its just a small change in pressure applied to the pedal that makes the difference from nothing to locking wheels..

you will soon wonder why you thought your good braking system was a problem

aitch

Can you adjust the pedal pushrod clearance? (freeplay before the cylinder operates)

This is a joke post, surely?

quote:

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Originally posted by speedyxjs
Ok, glad i checked.

Il leave as is then (new MC is a no, im trying desperately to save money for IVA)

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It's not such a daft question - Please bear in mind what Speedy is building and that wagons have air brakes!

suspect speedy has only ever driven cars with servo's and therefore isn't used to proper (non servo) brakes.

(says he who hasn't driven a car with proper brakes in 15 years!)

quote:

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Originally posted by Steve Hignett
This is a joke post, surely?

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quote:

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Originally posted by Richard Quinn
It's not such a daft question - Please bear in mind what Speedy is building and that wagons have air brakes!

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^^ bit harsh, good apology. I for one am very glad you asked, hate to think that you went ahead because of the possibility of asking a silly question..

The forum should be the perfect place to ask things we don't know, other wise why an earth would be bother to post (well in theory if every one is playing ball!)...

This is even more true for a safety critical component of the car, keep asking the questions!!

Dan

must say that the only car i have without a servo feels like the pedal has a block of wood under it but it goes through the mot ok
if you really dont like the lack of feel you can do a few things to help
change the pedal ratio by moving the pushrod position closer to the pivot point
smaller bore master cylinder
larger rear cylinders if your using drums
or fit a servo either direct or indirect
hope this helps
Ray
just a thought make sure the pedal isnt pushing the pushrod before you press it
the master cylinder piston must return fully to its off position and you should still be able to feel a little move ment on the pedal

I recently changed from a 22mm to 19mm master cylinder and it makes a big difference to how far the pedal moves.

Stu

bad idea, you bleed your system of air for a reason. having said that, i have heard a rumour that valentino rossi has his engineers leave a little air in his rear brake pipe to help prevent lock-ups