Gez G
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Registered: 12th May 04
Location: Glasgow
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Good idea or bad?
Heard mixed reports, some people say they are great, others say that they make the back end very twitchy and with tendancies to try and overtake the front under harsh braking.
Anyone had one done, what do they think?
If I am to do one, what will I need?
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SteveW
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Registered: 15th Jul 02
Location: Up in the clouds
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i dont know much about tech side of things, or even what it takes ??
but i have them on the ThunderCorsa and everything feels fine, even when i had to slam the anchors on to avoid a smash the other month 
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bradfincham
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Registered: 20th Sep 02
Location: East Of England Drives: Clio 172
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as long as u dont go massive on size and get them setup correctly your fine, i prefer 80% braking on the front!
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timrud_
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Registered: 3rd Jul 04
Location: Sheffield
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A car with little or no weight in the back (i.e. stripped out) would be twitchy.
But what other choice is there? I melted a set of drums in 3 months!
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lee mitchell
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Registered: 26th Jan 01
Location: kent...drive's: eveyones conversion cars hard lol
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check my sig
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Siberia
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Registered: 9th Oct 03
Location: Leprechaun Land Drives : Zafira GSI
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i read somewere that you can buy different step down fittings that dont let so much fluid into the rear....
i must do this mod myself i just have to find an astra rear beam...
[Edited on 19-01-2005 by Siberia]
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Tim
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Registered: 21st Apr 00
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With the appropriate biassing it'll be fine (and much less fade when the rear gets hot)...
If you wanted it setup properly there's lots of companies who will do the appropriate weighing etc and setup the bias for you -- some trackdays they do reduced price consultations...
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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you dont need rear disks unless your running a LET, possibly an XE deffo nothing less
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willay
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Organiser: South East, National Events
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Registered: 10th Nov 02
Location: Roydon, Essex
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Mtec reccomends rear brakes on anything past 170bhp I beleve, so I'd agree with Steve.
Don't see why it would be a bad thing to have rear discs with an XE..
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Tim
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Registered: 21st Apr 00
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Steve I don't understand this whole argument people have that braking is related to the power of the car... It's possible true on a trackday as you'd never be able to get upto the same speeds, but on the road, I personally think that you can never stop quickly enough...
...suppose it more boils down to whether you want to spend all that money on braking when it's a not a particularly quick car.
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Siberia
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Registered: 9th Oct 03
Location: Leprechaun Land Drives : Zafira GSI
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if i was doing it 40% would be for the braking difference 60% would be for looks.... Sad i know but blow me
i also dont really need 288mm front brakes but i have them
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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quote:
Originally posted by Tim
Steve I don't understand this whole argument people have that braking is related to the power of the car... It's possible true on a trackday as you'd never be able to get upto the same speeds, but on the road, I personally think that you can never stop quickly enough...
...suppose it more boils down to whether you want to spend all that money on braking when it's a not a particularly quick car.
for the exact reason vaux didnt make all the corsa models with rear brakes, they arent needed, and on lesser engined models will lock up all to easily under heavy braking, you are forgetting the whole concept of efficient braking, its about as coming to a halt as quick as possible without locking up, i used to be able to lock all four wheels instantly on my old corsa that had rear drums so they were quite adequate for the needs of the vehicle, having rear disks would not have given it anything extra.
Just unecessary cost
[Edited on 19-01-2005 by Steve]
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timrud_
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Registered: 3rd Jul 04
Location: Sheffield
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Sorry Steve, I'm with Tim.
Vauxhall didn't put them on as they were an unessesary cost. Yes. BUT That doesn't mean they are not needed and won't bring about an improvement?
My 1.2 Clio doesn't have an airbag, does that mean it doesn't have enough power to crash?
Saxo VTR's come with them as standard, so all this "170bhp and beyond" talk is rubbish...
And I run 300bhp and havent got them LOL (Yet  )
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Tim
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Registered: 21st Apr 00
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I'm not saying get rear discs for harder braking power at the back... I'm only saying they're better due to fade problems when you use drums extensively (i.e. timrud driving style or a track-day)...
Rear discs, properly setup, would be nice -- plus they do look better 
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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quote:
Originally posted by timrud_
Sorry Steve, I'm with Tim.
Vauxhall didn't put them on as they were an unessesary cost. Yes. BUT That doesn't mean they are not needed and won't bring about an improvement?
My 1.2 Clio doesn't have an airbag, does that mean it doesn't have enough power to crash?
Saxo VTR's come with them as standard, so all this "170bhp and beyond" talk is rubbish...
And I run 300bhp and havent got them LOL (Yet )
sorry tim there is no need for fucking rear disks in a 1.2 corsa, they wont bring about an improvement in a car without enough weight or power is downright fucking dangerous
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Tim
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Registered: 21st Apr 00
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What has weight got to do with it? Kindnesses XE probably weights less than this 1.2
Like I said, people that say the rear end is twitchy is because it's probably just bolted on... If you get it PROPERLY SETUP then rear discs will give better performance and safety. Vauxhall were just cheap skates when they built.
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timrud_
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Registered: 3rd Jul 04
Location: Sheffield
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If the back end is super stripped out, and the fronts are really sharp, thats when the problems can start.
But you can never have too much safety on a car! Properly setup they cannot be detramental to performance, so why not have them?
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boyracer2002
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Registered: 10th Aug 02
Location: West Yorkshire
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I got them on mine and i cant tell i have them got em for looks more than andthing else, spose i got the weight of the install in there but still 
[Edited on 19-01-2005 by boyracer2002]
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timrud_
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Registered: 3rd Jul 04
Location: Sheffield
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SO you can deffo tell a difference? What fronts you got?
I'm having mine done soon...
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boyracer2002
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Registered: 10th Aug 02
Location: West Yorkshire
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Sorry tim i meant i cant tell the diff
fronts i have are 308mm v6
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timrud_
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Registered: 3rd Jul 04
Location: Sheffield
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Doh! LOL
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Tim
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Registered: 21st Apr 00
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I was just of the opinion that it's not about major braking enhancement (as fronts do most the work), but more to do with fade -- few fast stops on standard drums and they won't be predictable...
I was advised not to worry about rear discs until I wanted to go on a track, but that doesn't stop my argument that there isn't a key 'bhp limit' when you do or do not need rear discs...
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bradfincham
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Registered: 20th Sep 02
Location: East Of England Drives: Clio 172
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tim and tim im with you here!
rear discs will help on whatever car ypu put them on, providing they are set up right.
Im going to be putting my 2ltr ones on the back soon.
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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no you are wrong, on a car that does not require rear disks, even IF they are set up correctly they will offer you no more.
Im mean how much fucking fade are you gonna get stopping from 80mph in a 1.2
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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on a track different story though, as you are constantly on the brakes
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