114.3 stock rear rotors? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Celigts · 03-08-2015, 03:41 PM

Do they make 114.3 rotors that'll fit on our rear rotors?

Basically I'm looking to do the hub conversion and cannot find a solution...

They make rotors that are 114.3 obviously but apparently they require new brakes and that's not in the cards right now ...

Basically I'm looking for SAME SPEC Rotors as our rear but are 5x114.3 instead of the stock 5x100.

Any advice?

swarb · 03-08-2015, 03:53 PM

It is not simply just swapping rotors, you need to swap HUBS in addition. You can buy conversion hubs and drill new holes in the rotors. The other solution is getting sti parts or z32 parts. If you can't afford new brakes, you can't afford the hub conversion. At that point just get conversion spacers.

Celigts · 03-08-2015, 04:49 PM

Quote:

Originally Posted by swarb

It is not simply just swapping rotors, you need to swap HUBS in addition. You can buy conversion hubs and drill new holes in the rotors. The other solution is getting sti parts or z32 parts. If you can't afford new brakes, you can't afford the hub conversion. At that point just get conversion spacers.

I can afford it ... just don't know enough about brakes to pick the right ones. I'm not there in my build yet

I bought the hub conversion rears ... Any way i can avoid re-drilling? They don't make a 5x100 rotor for our cars that also have holes for 5x114.3?? Hard to believe We can't get BOTH!

Bought 15mm project kics conversion for the front ...

swarb · 03-08-2015, 05:18 PM

I remember reading about a rotor that was the same size in 114, you just have to search for it(was it dba rotors?), many companies will find or drill you a set for your application. Or measure/find the specs of the stock size and call someone or open up a application list with specs from a rotor company.

finch1750 · 03-08-2015, 06:04 PM

Quote:

Originally Posted by Celigts

Do they make 114.3 rotors that'll fit on our rear rotors?

Basically I'm looking to do the hub conversion and cannot find a solution...

They make rotors that are 114.3 obviously but apparently they require new brakes and that's not in the cards right now ...

Basically I'm looking for SAME SPEC Rotors as our rear but are 5x114.3 instead of the stock 5x100.

Any advice?

Z32 (aka 300zx) rears are the same size discs in 5x114.3

Celigts · 03-08-2015, 06:41 PM

Quote:

Originally Posted by finch1750

Z32 (aka 300zx) rears are the same size discs in 5x114.3

Anyone confirm this??? I'm going to Google it now.

finch1750 · 03-08-2015, 07:23 PM

Quote:

Originally Posted by Celigts

Anyone confirm this??? I'm going to Google it now.

Its been discussed in the z32 caliper swap thread. Search something like "my $600 bbk"

Celigts · 03-08-2015, 07:35 PM

Quote:

Originally Posted by finch1750

Its been discussed in the z32 caliper swap thread. Search something like "my $600 bbk"

I saw that the z31 87-89 says it's 290x18mm

Which is the same thing as the stock FRS rear rotors ...

Does this mean it works?

I'll see if i can locate the z32 caliper swap thread.

Celigts · 03-08-2015, 07:41 PM

Quote:

Originally Posted by finch1750

Its been discussed in the z32 caliper swap thread. Search something like "my $600 bbk"

Found this

http://www.nicoclub.com/archives/nis...r-frs-brz.html

But this is a write up for the FRONT.

Our Front rotors are different than our rears, so this won't work right?

Thanks,

finch1750 · 03-08-2015, 07:44 PM

Quote:

Originally Posted by Celigts

Found this

http://www.nicoclub.com/archives/nis...r-frs-brz.html

But this is a write up for the FRONT.

Our Front rotors are different than our rears, so this won't work right?

Thanks,

The fronts are different, but the rears are the same. Its discussed when talking about brake bias to ensure it remained OK compared to stock.

Celigts · 03-08-2015, 07:51 PM

Rotors:

Rotor Specs: Legacy GT front rotors are 316mm in diameter by 30mm in width. Stock BRZ/FRS rotors are 294mm in diameter and 24mm in width. OEM Legacy GT rotors are 22 lbs while BRZ rotors are 17 lbs.

he used legacy rotors in this and they are fronts only.

what do i look for when comparing stock rotors to ensure the brakes will fit?

stock oem rear frs rotors:

I've found that 87-89 z31 (300zx) rotors are:
5x114.3
290x18mm

What else do I need to make sure works for the rotors?

Remember I'm going to be using the Subaru rear hubs.

Celigts · 03-08-2015, 08:00 PM

Quote:

Originally Posted by finch1750

The fronts are different, but the rears are the same. Its discussed when talking about brake bias to ensure it remained OK compared to stock.

Wait...This confused me...

You're saying I can use the z32 rotor on the REAR and retain the same STOCK frs brakes?

Celigts · 03-08-2015, 09:26 PM

Just checked with a local auto parts store...the z31 rotor and z32 rotors will not fit the hub. They are too big

Back to Square one.

finch1750 · 03-08-2015, 10:35 PM

Quote:

Originally Posted by Celigts

Just checked with a local auto parts store...the z31 rotor and z32 rotors will not fit the hub. They are too big

Back to Square one.

What size is the hub on the z32?

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03-08-2015, 03:53 PM	#2
swarb Senior Member Join Date: Sep 2014 Drives: BRZ Location: Los Angeles Posts: 3,053 Thanks: 1,773 Thanked 2,451 Times in 1,271 Posts Mentioned: 79 Post(s) Tagged: 0 Thread(s)	It is not simply just swapping rotors, you need to swap HUBS in addition. You can buy conversion hubs and drill new holes in the rotors. The other solution is getting sti parts or z32 parts. If you can't afford new brakes, you can't afford the hub conversion. At that point just get conversion spacers.

03-08-2015, 05:18 PM	#4
swarb Senior Member Join Date: Sep 2014 Drives: BRZ Location: Los Angeles Posts: 3,053 Thanks: 1,773 Thanked 2,451 Times in 1,271 Posts Mentioned: 79 Post(s) Tagged: 0 Thread(s)	I remember reading about a rotor that was the same size in 114, you just have to search for it(was it dba rotors?), many companies will find or drill you a set for your application. Or measure/find the specs of the stock size and call someone or open up a application list with specs from a rotor company.

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