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Brakes
Posted: Wed Dec 17, 2014 1:25 am
by Sambe30
I have a 316 '90, discs front, drums rear.
Just had new discs and pads fitted up front and shoes rear.
It also had new all new brake pipes and fluid. And the brakes are still s***.
Anything I can do to get them better. If not anybody know how much a conversion to rear discs would cost, would I need a new rear axle? Any help is much appreciated.
Re: Brakes
Posted: Wed Dec 17, 2014 8:03 am
by capri_rob
Make sure the shoes are properly adjusted at the rear.
Adjust the pedal linkage under the dash to take any slack out of the linkage system.
To change to rear disks yes you will need the rear disk trailing arms together with all the associated braking components. It's not really a job to be doing outside on axle stands at this time of year, and if it hasn't been apart before or recently you are guaranteed to find lots of other bits that need doing once you start taking it to bits.
Re: Brakes
Posted: Wed Dec 17, 2014 8:13 am
by 325ftmfw
drive around on them for a week.. new brakes can take a bit to start biting
Re: Brakes
Posted: Wed Dec 17, 2014 8:48 am
by Grrrmachine
Even if you switch to rear disks, the brake bias means that you won't see a huge improvement anyway.
What discs and pads did you use? And are you confusing stopping power with pedal feel? The E30's brakes will always feel a bit heavy compared to modern cars, but they're still more than capable of bringing you to a halt as long as you have a few muscles in your right leg.
Re: Brakes
Posted: Wed Dec 17, 2014 11:13 am
by Sambe30
It was done by a garage, and they are EBC discs and pads I believe, and nope pedal pretty much goes right to the floor and has like no stopping power, it almost makes me not want to drive it its that scary
Re: Brakes
Posted: Wed Dec 17, 2014 11:30 am
by jimmyspeed
Sounds like it's full off air or a problem with the cylinders
What was it like before the garage got hold off it?
Re: Brakes
Posted: Wed Dec 17, 2014 11:58 am
by maxfield
jimmyspeed wrote:Sounds like it's full off air or a problem with the cylinders
What was it like before the garage got hold off it?
^^
Not a very good garage if they're letting a car go out with no brake pedal!!!
Re: Brakes
Posted: Wed Dec 17, 2014 12:03 pm
by jimbom30cab
If the linkage has no more than a little slack, you have air in the system
Re: Brakes
Posted: Wed Dec 17, 2014 6:43 pm
by BHadley
Take it back to or call up who did the work and explain what the problem is.
Have you noticed any puddles under the car
Was any brake bleeding work done?
Can take a few hundred miles for parts to bed in but you should get a goodish brake pedal all the same.
Re: Brakes
Posted: Thu Dec 18, 2014 2:37 am
by 325ftmfw
theres air in it
Re: Brakes
Posted: Thu Dec 18, 2014 10:12 am
by Brianmoooore
would be interesting to know if whoever fitted the new pads just forced the calliper pistons back, or did it properly by opening the bleed nipples and pushing them back.
Re: Brakes
Posted: Thu Dec 18, 2014 6:06 pm
by maxfield
Brianmoooore wrote:would be interesting to know if whoever fitted the new pads just forced the calliper pistons back, or did it properly by opening the bleed nipples and pushing them back.
I've fitted 100s sets of brakes, the only time I'd undo a bleed nipple is if the piston wouldn't go back to check whether seized piston or collapsed hose. Never have I had a problem.
Re: Brakes
Posted: Thu Dec 18, 2014 6:41 pm
by Brianmoooore
maxfield wrote:Brianmoooore wrote:would be interesting to know if whoever fitted the new pads just forced the calliper pistons back, or did it properly by opening the bleed nipples and pushing them back.
I've fitted 100s sets of brakes, the only time I'd undo a bleed nipple is if the piston wouldn't go back to check whether seized piston or collapsed hose. Never have I had a problem.
The state of the few ccs of fluid that have been sitting in the bore of a caliper with the piston extended because of worn pads is very different from that in the rest of the system, and is best discarded, rather than forced back into the ABS pump or master cylinder.
In a commercial workshop environment, completing the job in the shortest possible time is the prime objective, with good engineering practice a poor second.
Re: Brakes
Posted: Wed Jan 28, 2015 7:19 pm
by mikemike
hi from mike , I had a problem with my brakes ever since I bought it , the pedal travel was terrible , the brakes on my wifes car is great , I read on an American web site to fix the problem was to fit a master cylinder from a 7 series , so go from a 22mm cylinder to a 25mm cylinder what a difference I now have brakes I can trust , it was £158 for the master cylinder and you can use your original expansion tank , hope this helps , mike
Re: Brakes
Posted: Wed Jan 28, 2015 7:30 pm
by Brianmoooore
mikemike wrote:hi from mike , I had a problem with my brakes ever since I bought it , the pedal travel was terrible , the brakes on my wifes car is great , I read on an American web site to fix the problem was to fit a master cylinder from a 7 series , so go from a 22mm cylinder to a 25mm cylinder what a difference I now have brakes I can trust , it was £158 for the master cylinder and you can use your original expansion tank , hope this helps , mike
That will just increase the already high (by current fashion) pedal pressure. It was fitting a NEW master cylinder that made the difference, not a different one.
25mm cylinder is only required when fitting calipers with a similarly increased piston area.
Re: Brakes
Posted: Thu Jan 29, 2015 9:22 am
by Grzesiek325i
If all is properly done and brakes still are not enough good you can change brake disc from solid to ventilated (if you got solid at the moment) before changing drums to discs
Re: Brakes
Posted: Thu Jan 29, 2015 11:41 am
by HairyScreech
The 25mm cylinder will give more "feel"/a pedal that needs more force to push.
I know a lot of the motorsport teams follow the route of the use the largest cylinder/hardest pedal the driver can still push enough to lock.
Its something I might try on mine out of curiosity, will give objective results of I do.