shauny bizzle
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Registered: 2nd Aug 06
Location: Sheppey, Kent Drives: Vectra GSI V6
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hello i have a corsa gsi and doing a rear disc conversion, im was going to upgrade the fronts to 2 litres but my current set up is 256x20 and the 2.0 one are 256x24 so surely i just need to change the pads and discs? its only the width of the disc so surely they fit or are the calipers slightly wider? its only becuase i dont want the back end locking up im backing the load sense valve right off
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Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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fit bias valve in-line and bias more towards the front
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x14xe sport
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Registered: 27th Apr 09
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quote:
Originally posted by Nic Barnes
fit bias valve in-line and bias more towards the front
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Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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thing is with the 2.0 discs, they are vented at the centre aswell whereas the 1.6 ones arent. this does helping cooling a lot.
depends what you are doing with the car, but overall rear drums and larger front brakes is normally a good enough combination.
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Gareth F
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Registered: 16th Jan 08
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The discs are wider and the callipers are bigger so you want to upgrade everything. Well thats what i would have thought 
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Gareth F
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Registered: 16th Jan 08
Location: Location Location
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quote:
Originally posted by Nic Barnes
thing is with the 2.0 discs, they are vented at the centre aswell whereas the 1.6 ones arent. this does helping cooling a lot.
ah did not notice this when I fitted mine, thought the disc design was the same apart from being 4mm thicker. Couldnt find my braided hoses though went I fitted mine, just dug them out. I suppose they will just improve the feel of the brakes ie firmer?
[Edited on 31-01-2010 by Gareth F]
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shauny bizzle
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Registered: 2nd Aug 06
Location: Sheppey, Kent Drives: Vectra GSI V6
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yeah its just i see a post someone used 2.0 brakes with rear disc conversion and he DIDNT use a bias valve, and he didnt suffer from the back end twitching, i was going to se braided hoses on the front if this will improve braking, and back the lsv off, i have abs so ill be pulling th fuse out etc of it or i might try the sensors on my 1.8 astra gsi hubs to see if they work with my 1600 abs so if i did put 2 litres with braided hoses i doubt my back end would lock up,
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Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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the last thing you want to do on a short wheelbase fwd lightish car like a corsa is improve the rear end braking ability without drastically improving the front. all the weight on a corsa is up front. without correctly biasing the rear braking if you fit discs, it will make the back end go very light. which really isnt ideal at all.
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corsadonk
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Registered: 4th Jul 09
Location: Marlborough, Wiltshire
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As Nic said, don't fit discs on the back just to make it look better. Just get some four pots up front
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shauny bizzle
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Registered: 2nd Aug 06
Location: Sheppey, Kent Drives: Vectra GSI V6
User status: Offline
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i do like the look of rear discs tho better than boring old drums, its not gunna be used on track hardly, its just i got abs and what an arse to re-pipe the brakes would i need to change the master cylinder if i was to swap brake lines off a non abs corsa? that way be easier to bias the brakes
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Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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dont need to change master cylinder. and honestly, good luck trying to use 2nd hand brake lines off another car.
still though you would have 2 lines going to the rear from 2 seperate circuits. you would need 2 bias valves.
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