rear disc, big effect?

normality78

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normality78

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Does rear disc conversion do help alot in braking power? or its only slightly better thn rear drum?
 

boyzone

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Rear braking only perform 30% of the overall braking.

People go to disc is because :
to prevent rear wheel jamming when high speed braking..
 

narx

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you still using brakes?
i thought using parachutes already..hehe ;)

norm,
yup it does. if done correctly
 

Doink

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rear disc brake for efficient braking...wont jammed so easily...when dry and can withstand heat...heat dissipation is better...cause the braking system is open instead of drum which is closed...
 

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Hate to admit it but cars with all round disc looks better too...hehehe:_: give ppl that "i got lots of Hp" feelings...
 

normality78

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tks for all bros feedback.
 

140dB

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140dB

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just as a side note

i upgraded my satria 1.3 brakes to 1.6/1.8 front ventilated, slotted, crossed drilled and rear 1.6/1.8 slotted, drilled disc wif bendix metal king. pump left standard.

braking performance when cold is same or very marginally better than the stock setup. so much for the looks.

when heated up, the performance is superb. super satisfied. can lock all four wheels easily.

so...suit your driving style and what u want from ur braking system. if u just want extra force for daily stop go drive, go for upgraded pads....enuff oledi....race or semi race pads need some heating up to get to proper working temperature. below that temp. i guarantee u will be dissappointed.

my 2c
 

SkYwAlKeR

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i thought someone previously jz said by changing rear to disc brake, u dont lock ur wheels so often??... hmm.... and u said can lock ur 4 wheels often, vr good... hmm, confiused...
 

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I am lost also... Does he means the brakes will work very very well when it reaches it's working temperature? When it's cold, it performs just like stock?
 

normality78

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not only both of u. im totally lost here
 

TitanRev

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I think some pads need to get warmed up 1st to get a better braking. I think those are the racing type brake pads lah....

My Mintex pads also need some warm up or light braking to warm up 1st. After that it works very well with the my EBC cross drilled disc.
 

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TitanRev said:
Hate to admit it but cars with all round disc looks better too...hehehe:_: give ppl that "i got lots of Hp" feelings...
i sorta agree to that... i did mine merely for looks. heh heh heh....

like this.. i just love this view so much... hahaha

 

TOMEI-R

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All round disc does look better. But it depends on your driving style and ways. For track racing, rear disc brakes seems to help a lot especially when u are going at top speed and then braking to go into a slower turn. It helps to hold the car in line during braking and braking is much more effective.
But some friends prefer drum brakes for autocross events because they say drum brakes work better during slow speed turns and braking.
Just my 2 cents.
 

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im still yet to change rear discs... :(
have to save rm550 for GSR whole set rear...
 

SE86

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i also changed my rear drum to disc brake...but the effect was not tht much...i think is better to get a better brake booster...maybe from a bigger cc car..the effect and pedal feel is more better..at high speed braking not easy to loose control
 

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TOMEI-R said:
All round disc does look better. But it depends on your driving style and ways. For track racing, rear disc brakes seems to help a lot especially when u are going at top speed and then braking to go into a slower turn. It helps to hold the car in line during braking and braking is much more effective.
But some friends prefer drum brakes for autocross events because they say drum brakes work better during slow speed turns and braking.
Just my 2 cents.
coz ebrake works best on drum brakes... i heard many face difficulties using ebrake after changing the rear to disc brakes... even parking on slopes also cannot stop...

what i heard from friend, procedure of brake upgrades;
- better brake pads
- brake pump and servo
- upgrade front rotors
- upgrade rear rotors

coz rear only takes up about 30% of overall braking performance... front is more important, 70% of the stopping power....


correct me if wrong...
 

xcheong

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like everyone said, rear disc brake gives u more efficient braking and better looks...
its best to upgrade the front disc brake to bigger one too
like evo twin pots...

don't forget to upgrade your brake servo to double layer ones.
upgrading brake servo does helps alot in braking.

get the ones from nissan. its bloody good.
i'm using front and rear evo disc brake and evo brake servo.
braking very nice.
no jamming anymore unlike my ex- 1.3 front disc and rear drum which causes me 2accident cuz of brake jam during extreme driving... ;(

those bigger brakes will only works better at high temperature.
when u goin on high speed, those bigger brakes will bite alot better. and u don't even need to slam the brake so hard to slow your car.
just a light press will do. and your car will slow down tremendously.

during normal driving, it will just feels like your stock brakes.
 

fzavier

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normality78 said:
not only both of u. im totally lost here

mmmmm....me too. Im also contemplating on changing my rear drum brakes to dicsc but not sure of the improvement in stopping power. My front brakes are discs by the way. Hope someone will help see things clearly. Appreciate that!
 

SkYwAlKeR

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fzavier said:
mmmmm....me too. Im also contemplating on changing my rear drum brakes to dicsc but not sure of the improvement in stopping power. My front brakes are discs by the way. Hope someone will help see things clearly. Appreciate that!
if like that, upgrade ur brake pump+servo first lor...
or upgrade front disc brake to bigger ones or ventilated ones...

rear brakes, remain as drums first la if u havent go for engine transplant... coz as far as i know, all cars with displacement above 1600cc must have all 4 disc brakes front and rear...
 

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just a word of caution here, if you do upgrade your rear from drums to disc, please do remember to upgrade your brake booster and servo too if not you will experiance sluggish braking or the braking power is not enough due to the small size booster.

btw, im using all round disc too =) braking wise, way much better compared to drums. it bites better and stops the car in shorter distance.

in autokhana wise, i would say drums are waaaaayyy much better compared to disc(unless of course you are using a BMW cause they have drums as their e-brakes and disc as their normal brakes) cause in normal cisumstances, disc are harder to lock when using the e-brakes compared to drums... =) durms lock up real easy when using the e-brakes but is not effective when its at high operation tempretures [eg:constant braking] =)
 

shiroitenshi

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When changing to discs, you need a proportioning valve, along with the master cyclinder..

Preferably from the same make of car you got the discs from, or from a 4 disc version of your car (sorry, this applies to hondas, but dunno about your make, I think they call it with the same name). What it does is split the pressure to the front and the rear brake calipers to provide uniform braking.

It works something like a front/rear brake bias controller, except it's non adjustable.

If you use the stock proportioning valve from your car that has drums, your rear brakes may actually activate first, causing rear end skidding and reducing braking performance overall, since a drum needs a different amount of pressure to provide the same amount of braking. And brake modulation will probably be an issue as well.
 
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TOMEI-R

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Couldnt agree better with Gavan. Drums work wayyyyy better in Autokhana and Autocross evens. Much easier to do handbrake turns.
 

jswong

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I'm driving Wira aeroback 1.5, and I changed the front and rear to Wira 1.6/1.8 disc brakes. Initially, I was losing braking power because the stock servo wasn't supplying enough pressure to the calipers.

After putting in a VR4 double layer brake servo.. my gosh, what a big diffference it made. Furthermore, when taking a tight sweeping turn, rear discs DO make a difference... you can feel that push-pull sensation (hard to describe) rather than the car diving forward as it did previously. Certainly can sweep a corner better and faster with rear discs.. feels more sure-footed.
 

narx

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SkYwAlKeR said:
coz ebrake works best on drum brakes... i heard many face difficulties using ebrake after changing the rear to disc brakes... even parking on slopes also cannot stop...

what i heard from friend, procedure of brake upgrades;
- better brake pads
- brake pump and servo
- upgrade front rotors
- upgrade rear rotors

coz rear only takes up about 30% of overall braking performance... front is more important, 70% of the stopping power....


correct me if wrong...
dont forget the brake bias valve. It creates the front and rear distribution correctly. or else u`ll screw up your brake distribution which might lead to accidents or spin outs
 

SkYwAlKeR

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doppelganger said:
bump :D

i drive a wira 1.3. wanna change front discs only. wat model would be suitable? should i change the pump & servo? wat would the cost be for servo+pump+disc+pads?
mayb u can get wira 1.6L for set front and rear... if u want more extreme, get GSR or EVO brakes lor...:regular_smile:

narx said:
dont forget the brake bias valve. It creates the front and rear distribution correctly. or else u`ll screw up your brake distribution which might lead to accidents or spin outs
brake bias valve??.... where is it located??... expensive??...
 

normality78

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BLaCkHoWLiNG said:
banyak mad scientists here ...see oso scared...
but thn you're the professor
 

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SkYwAlKeR said:
coz as far as i know, all cars with displacement above 1600cc must have all 4 disc brakes front and rear...
my car is 1800cc but comes with stock rear drums... :sad_smile:
 

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SkYwAlKeR said:
1.8L with drum brakes??... old school car arr??....

i notice some 1.6L honda also has rear drum brakes....:Not_Impressed:
sigh.....car was manufactured in 1997 :(
 

normality78

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wahahah. dun be suprised that some year 2000 car still come with stock drum at rear
 

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boyzone said:
Rear braking only perform 30% of the overall braking.

People go to disc is because :
to prevent rear wheel jamming when high speed braking..
You mean that a car with ABS can also jam the brakes? Or do you mean the drum brakes lock up more easily than discs?