porsche brembos fitted. not good!

[20 valve ted]

just fitted my porsche brakes there off the back of a boxster. everything fits fine it just braking is poor, my question is whats wrong?

do they just need wearing in could the calipers be siezed or could it be bleeding? the pedal feels quite hard but doesnt stop well.

 

[jamesgtturbo]

maybe a daft question but have you fitted them on the front or rear ?

 

[DaNnY_LaD]

Hows the pedal feel ted?

What disc and pads?

 

[20 valve ted]

there on the front, and the pedal is hard pretty much from the top of pedal, brembo ibiza disks and gsf pads. surely the pads wouldnt be the issue as even cheap pads should stop a car

 

[DaNnY_LaD]

yeah true but Decent pads really do help...

If the pedal is hard then it doesnt need bleeding IRRC..

are all the pistons fine?

 

[mjhmjh2]

What is the total slave cylinder area of the old calipers versus the new calipers? A mismatch can give the symptoms you mentioned. You can change the pedal fulcrum point to compensate a little by giving more leverage, however I've not looked in depth at the seat setup to see if it was possible (only on my kit car).

Matthew

 

[Ibiza125]

The discs might just need bedding in?

 

[20 valve ted]

im hoping its just the disks. ive got to take the bleeder kit i borrowed back to guy at garage so will ask him then. hope he can explain. just hope its not the calipers!

 

[cupramillo]

i remember a while back when my mate changed my old disks and pads to brand new ones, and initially they were shockingly bad, until the pads wore in and the discs got abit of usage in them

 

[mjhmjh2]

I guess it depends what you mean by braking is poor. They should stop the car with no trouble at all and within a mile of gentle on off breaking (don't let them heat up too much else they'll glaze) will be bedded in enough to see a difference. If you use them too much too fast you'll glaze the pads and you may as well chuck the pads at that stage.

How much bigger were the porsche discs out of interest? Did the callipers bolt straight on or have you modified stuff?

Matthew

 

[artemis_1991]

Possibly due to different master cylinder in the porsche, the ibiza one may not be able to work the slave cylinder correctly as it's not designed for the posche one? Just a guess.

 

[20 valve ted]

ive used the cupra r brembo disks (had 2mm shaved off each side) normal pads for the calipers and used cupra r mounts (think ive had 3 or 4 mm off the face that bolts to the car, i think it is in a post elsewhere the exact sizes) just dropped the girlfriend off at work and they feel a little better going to garage now to take bleeder back so see what he says. will let you know.

 

[20 valve ted]

he said pedal feels good and that they should wear in, also mentioned there bloody massive

 

[kyle'87]

he said pedal feels good and that they should wear in, also mentioned there bloody massive

pics

 

[20 valve ted]

please ignore my bumper its a work in progress lol





and a pic of my new wheels over the brakes

and one showing the new rears

 

[kyle'87]

]

look wicked under the new wheels mate

 

[20 valve ted]

thanks. now i really need to save up for the rubber and spray them black

can anyone sugest a tire size for the rear there 17 8.5j want it quite stretched but not ott

 

[artemis_1991]

215 40s would look good! depends how much you want though

 

[Reuvers]

hey mate, what size adapters were you running on the C2's? And were they the 7J 8J ones ET 52 and a bit?

Brakes look sick. new wheels look good too

look on tyrestretch.com/index for stretched tyres

 

[20 valve ted]

There 7j front and rear et 52 i think. with 20mm spacers up front and 40mm rear! Im lovin the look of the brakes but as i work away all week i only get to drive it 2 days so bedding them in will take ages! Iv had a look on that site before some serious stretch on some!