ep91 n/a brake upgrade question

[fiddlersport]

if fitting glanza front calipers to n/a starlet do i need to change the servo or master cylinder ?

[5e colin]

servo will be ok

[drongo boi]

I've got glanza brakes on mine n it's all fine :-)

[morgey]

Only if you change to rear discs do you need to change the bias valve. Fronts just bolt on and bleed.

[fiddlersport]

think my servo is knackered, making a noise from the inside of servo when i press the pedal and brake pedal is a bit spongy and foot travels all the way down then locks the brakes. just fitted glanza calipers and discs and made sure they were all working before install.

only noticed the noise when me and a pal were bleeding the brakes

[_shaun_]

The calipers are the same anyway its only the carriers that are different.

[rob_bower]

^^^ this.

[mikey4410]

as shaun said, the carriers are different.

you can get starlet brake parts second hand on ebay if you do find servos dead.

morgey thats not correct dude.i have a sportif with rear disc conversion and never done that.brakings fine and never had an issue

[morgey]

Maybe not 100% but its advisable, my rear is doing f/a and I've replaced everything other than that but will be doing it sooner or later. Next Mot will tell for sure though

[fiddlersport]

I will be changing the bias valve when i install the rear discs/calipers and also will change the servo since mine is knackered, will let you guys know if it gets sorted

[rob_bower]

The bias valves are suppposed to be different, the % which the send to the rear is meant to be greater for discs.

[mikey4410]

well thats wierd as my brakes are epic.and most important they are balanced.

genuinley not had an issue over the two years I have owned and driven daily and done track day.

they dont need to be changed (bias/brake pipe union)

[FMuscle]

Got a question about the rears. I swapped my drum axle to a Paseo disc yesterday, bolted on fine, but the E-brake is stiff as (I adjusted it at the lever after the swap), it's harder than with drums to pull up, it holds, but doesn't really stop the car if I rip it while rolling, let alone block the wheels... Why? I never had a caliper mounted e-brake before, did I miss something?

[Rob H@RCH Engineering]

Ha welcom to disc brakes! You will never have a hand brake that holds propely again!!😄 the bias valves are different for discs on the rear as disc brakes need a lot more pressure to get the same clamping force as a drum achieves due to the way they clamp the disc rather than wedging into a drum. Thats also why drum hand brakes are so much better there jammed into the drum hence why you have a leading and trailing shoe.

[Ryan5793]

im running wms 4 pots on the front and a rear disc conversion and not changed anything with my na servo/bias? :/

[Rob H@RCH Engineering]

Im running wilwoods and a GT rear axle on mine and I have not changed maine yet but I will get round to it one day! The rear axles been on it over 10 years now lol

[Ryan5793]

oh good haha il stick it on the 'to eventually sort' list

[FMuscle]

I guess It's time to change to hydraulic handbrake then... ;)

[Keri-WMS]

Drum brakes are more effective than rear discs...but the discs won't overheat. Most cars have to shift the bias to the rear if they have discs instead of drums. BUT...if you HAD drums but changed to discs you'll get a shift to the front as a result, which is what you want if you've got more grip (bigger/stickier tyres).

The one I would really avoid is fitting drums to a disc-rear car (luckily no-one wants to), as you'll have waaaay too much rear bias and will be sideways into every corner!

[Chris Green]

Interesting read this.

I was considering upgrading the rear axle to a Glanza one. What other options are there?

Are there any aftermarket options out there?

I personally think, aesthetically the rear disc are much more appealing, especially if updating the front.

For those wanting to uprate the rear shoes, PMU ones are available from Japan.

[fiddlersport]

Just to let you know huys, never did change the rear axle for disc conversion, just changed the front for glanza calipers, the shoes are good once set up properly

[FMuscle]

I was considering upgrading the rear axle to a Glanza one. What other options are there?

I went Paseo. Bought a mildly wrecked one for the engine and saved seats, shifter, 5 alloy wheels, front brakes and rear axle.

Swapping the fronts tomorrow, did the rear a couple of weeks ago.