NCP90 Rear Drum to Disc swap

[Compeer]

Hey guys I own a NZ new 2007 trd yaris NCP90, It's a 1.5 vvti 1nzfe 5speed manual with full trd trim and only 133,000km so shes in great shape.. I have previously changed the speedo cluster to the Vitz RS jdm cluster (was not fun) and put 15x7" old school deep dish Roh wheels and some BF goodrich low pro tires to replace the 2000's 17" chrome gross wheels it had on it. I also spent a day scrapping the trd lightening sticker kit off it as it was crazy cracked, but may get it restored as it was a $750 trd option.








Ok so it has all the same or even better trd versions of parts like the vitz RS BAR the rear drums. The vitz rs has the rear disc brakes and thats where this crashed vitz RS comes in as the donor.

https://gyazo.com/d32e373b134ee196f11a5f50c4d46f50

So the plan is full rear axle with everything attached so brake lines and ebrake cables.

So do I need the brake master cylinder as well guys? I cant find a different part number and people do other kits with out changing but thought Id ask and also document this a bit. Also anything else different for vitz rs? Does ecu have a different tune?

Shes low Km pretty rare car so this will only add value to her being the only actual Yaris with rear discs like the Vitz RS and allow me so many more brake upgrade options as far as pads and discs go.

Reading more on here i think I need the brake propertioning valve instead of the brake master cylinder? Tomorrow arvo i go to check out the car and tell them what i need them to pull off for my conversion kit which they gave me a flat price on, I just need to have the parts list ready.

Edit:
Checked out the donor car today and someone had nabbed a brake disc but also taken it apart and no bolts to be seen. So I may have to flag this. got 3 weeks before it gets scrapped so need to decide if i should just buy what they have and find new bolts.

[remcafee]

you would want to get the front brakes too off of it because then your rear brakes would be bigger than the fronts, you do not need a proportioning valve if you do the front and rear brakes off of the vitz rs

[remcafee]

you will also need the e brake cables, brake lines (flexible and hard lines on rear axle), backing plates, and i would get new rear axle bushings while you are doing that work

[Compeer]

Whats the size of the vitz RS front brake rotors compared to the 1.5 Yaris? Some of this info is hard to find, but I can measure my front rotors and the vitz rs, but it didnt look bigger and the rear ones are tiny. The front brakes are all their if its just the callipers and the rotors I need thats easy. Axle bushings should be sweet its pretty low k and never been thrashed, will check them to make sure.

[remcafee]

i cant remember exact size, i remember them being 25mm larger overall diameter, and like 5mm more thick, calipers physically look the same dimensions but the caliper piston bore diameter is larger

[Compeer]

thanx bro! ok front and rear brakes it is!

Edit: went back today and looked and the front brakes were missing most of the parts as they had been taken apart and sold in parts but then he said he though he had another RS but older model in the back and when i looked it was the same model and had the entire full set of untouched everything!

it just had 3 cars stacked ontop of it. Anyway Im getting the front hubs and brakes, rear entire subframe with hoses and the hand brake cables.

I hope the front brake hoses are the same?

[remcafee]

yes the front hoses are the same

[Compeer]

Sweet thank you. Whole set is going to be 225usd. Which I think is a pretty sweet price for basically the entire rear end and front erntire hubs lol

Should be able to drop the old one off and pop the new one on, Will just need to watch some guides on installing the handbrake cables.

Once I get this done plan is a custom header, maybe the 1zz throttle body and last but not least Ive been searching for a decent LSD corolla gearbox that bolts up.

[remcafee]

damn im jelous i bought everything new at my work with employee discount was still 1700$ i think, its hard to find rear disc yaris se out where i am that are in scrapyards

[Compeer]

Yeah Im in New Zealand so we have NZ new Yaris and also japanese secondhand import Vitz.

NZ has for the last 40 years imported secondhand JDM cars enmass. We have a deal with japan for their secondhand cars.

So there was a SE yaris that had the same brakes?

[remcafee]

the usdm 2012-2018 toyota yaris SE was outfitted with larger front brakes and rear disc brakes compared to the lower level trims

[Neinris]

Originally Posted by remcafee

you will also need the e brake cables, brake lines (flexible and hard lines on rear axle), backing plates, and i would get new rear axle bushings while you are doing that work

Would you happen to know the PN for the hard lines for the rear?

[Flubby]

This car looks pretty awesome! I wonder how much stopping distance will be improved with discs on the back, Im assuming it will be reduced a bit.

[Compeer]

Just did a little research and discs have between 17-33% less braking distance and have the same even after alot of braking where as the drums become weaker brakes the hotter they get.

This video shows this well https://www.youtube.com/watch?v=hgtZZUJ6PzA.

You can see the drum brake truck never even gets close to stopping where the disc brake truck does.

And cheers man the Yari's name is Ruby! I named her since I had named the last two corollas I had, First was Sally and the next was Betsy.

Also good old might car mods lol...my guide https://www.youtube.com/watch?v=3YhUv4cBoiA

[enviri]

^ hah its great to get solid figures to show those "its only cosmetic" naysayers of the mighty disc swap :P

[Compeer]

This is the best upgrade you can do for your car after tyres.

Also found this guy on youtube and they show you how to change a bunch of toyota brakes over that are all partsbin stuff and interchangeable.

https://www.youtube.com/watch?v=V6scgqKauLM

[remcafee]

Originally Posted by Neinris

Would you happen to know the PN for the hard lines for the rear?

47323-0d201 and 47324-0d201 are the part numbers for the left and right hard lines.

[remcafee]

Originally Posted by Flubby

This car looks pretty awesome! I wonder how much stopping distance will be improved with discs on the back, Im assuming it will be reduced a bit.

to be honest, the brakes dont necessarily change the stopping distance in my opinion, the thing i noticed most is more instant bite when you hit the pedal and less brake fade when you are 5+ laps in on a track the pedal does not get spongy.
tires are what affects your stopping distance in all reality