big brake help

[valvercam]

hi there got a corsa 1.4 sport been converted to a redtop, bought it as an unfinished project, i got sum v6 calipars and 288 ebc brakes, its all beld etc but when the car is running the pedal almost goes to th floor but when the car is off it seems fine, some corsa guru must have had this problem, any idea thanks

[roperstun]

you could have air in the brake lines?

[Jimi137]

Yeh it sounds like they might need bleeding m8

[valvercam]

have bleed them and bleed them, even changed the rear slave cylinders inside the drums, has any1 on here put big brakes on a corsa without swapping the master cylinder and they have been fine ??

[paterson_uk]

done the same conversion on mine had to buy a new master cylinder only a standard one.. as the bigger calipres require more fluid to fill them the first time i pumped the brakes it lifted the seals out the seats in the master cylinder were they wer old and weakend the cheapest place i found for a new one was eurocarparts not to sure if there a country wide shop managed to get one for £60 brand new (trade price)

[valvercam]

my mate just sd the exact same thing, cheers for the input m8