I am researching OEM disc brake upgrades (any OEM; not just Toyota/Scion) for the xB2 - Scion XB Forum
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post #1 of 67 (permalink) Old 10-09-2014, 09:24 PM Thread Starter
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Default I am researching OEM disc brake upgrades (any OEM; not just Toyota/Scion) for the xB2

I bought some new springs (NF210's) that have yet to be installed, and I figured I would take a shot at upgrading the brake system while I have everything apart. I'm a huge fan of cheap OEM swaps, and I'm convinced that there is at least one good brake swap upgrade out there using other OEM parts.

I consider any combination of these an "upgrade":

1. Larger disc
2. Significantly thicker disc (for the rear)
3. Significantly higher quality and/or stronger caliper

Because Centric has a nice open "scrape-able" catalog online with dimensions and specs, I started with the exact specs of the xB2 oem brakes rotors and calipers. Note that I am not necessarily endorsing this brand; I'm just using them as a reference. Here is what found for their xB2 discs and calipers:

Code:
REAR
====================================================
Rotor		Centric 12144161
			Outer Diameter	279.0mm
			Height		30.5mm
			Nom. Thick	10mm
			Min. Thick	8.5mm
			Hub Reg		62mm
			Bolt Size	14.6mm
			Bolt/Circle	5 x 114.3mm
			Weight		9.1lbs

Caliper		Centric 14144625/14144626
			Bore:		38mm
			Bleeder		10x1mm
			Port		10x1mm
			Mt Holes	12x1.25mm
			Pad		10x.13540	
			Brkt Cst#	T3
			CST#		TOKICO 1B

FRONT
====================================================
Rotor		Centric 12144147
			Outer Diameter	275.0mm
			Height		46.5mm
			Nom. Thick	25.0mm
			Min. Thick	22.0mm
			Hub Reg.	62.0mm
			Bolt Size	14.5mm
			Bolt Circle	5 x 114.3mm
			Weight		14.3lbs

Caliper		Centric 14144271/14144272
			Bore:		63.5mm
			Bleeder		7x1mm
			Port		10x1mm
			Mt Holes	12x1.25mm
			Pad		10x.12100	
			Brkt Cst#	25VC
			CST#		63-25
I am currently in the process of narrowing down compatible discs and rotors that may be swap candidates. Currently I am down to 53 discs that have the right hub diameter, bolt size, and bolt pattern. I'll post a list of my findings when I have it further narrowed. I haven't begun sorting through calipers, but I have a list of 253 to sort through.

I will use this thread as a running log of my research; no guarantee on results.
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post #2 of 67 (permalink) Old 10-09-2014, 11:03 PM Thread Starter
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Possible upgraded rotors...

Format:

Centric part number, diameter x thickness x height (all sizes in mm)

Front (stock is 275x25x46.5):

120.44083, 295.9 x 32.0 x 50.8
120.44088, 296.0 x 28.0 x 49.2
120.44146, 296.0 x 28.0 x 49.5
120.44102, 286.0 x 32.0 x 50.5
120.44103, 323.0 x 30.0 x 49.0
120.44107, 315.0 x 28.0 x 53.1
120.44122, 315.0 x 30.0 x 50.3
120.44130, 319.0 x 28.0 x 49.3
120.44170, 334.0 x 30.0 x 50.7

Rear (stock is 279x10x30.5):

12044140, 295.8 x 30.0 x 50.8
12044158, 328.0 x 28.0 x 49.0
12044168, 324.0 x 28.0 x 49.2

All of these (both front and rear) will require different calipers, but have the same bolt size, bolt pattern, hub size, and somewhat close height (backspacing). Research on calipers continues but will be much more difficult.

Last edited by Paul1114; 10-09-2014 at 11:11 PM.
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post #3 of 67 (permalink) Old 10-09-2014, 11:20 PM
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Porshe boxter brembos ?
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post #4 of 67 (permalink) Old 10-09-2014, 11:21 PM
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Could have got a used set of trd fronts with rotors for $500 on eBay.
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post #5 of 67 (permalink) Old 10-09-2014, 11:25 PM Thread Starter
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I know I could probably source a used TRD kit, but for me it's all about finding something new. I know the xB absolutely doesn't need any kind of brake upgrade

Just trying to figure out the right caliper, plus making a custom bracket will almost certainly be required.
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post #6 of 67 (permalink) Old 10-09-2014, 11:50 PM
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Making a custom bracket alone would be a bit expensive. There was some dude who put f sport calipers on his tc. I think it was on scion life. His dad has a machine shop and it still ended up costing way more than I'd be willing to spend.
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post #7 of 67 (permalink) Old 10-10-2014, 12:19 AM Thread Starter
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2006-2011 Camry front brakes may actually be a direct bolt on swap for the front. I've done some basic photoshop overlays, but here's what you get:

Rotor diameter increases from 10.82" to 11.65" (not dramatic, I know)
Rotor thickness increases from 25mm to 28mm (again, nothing crazy)

Back spacing (hat height) may be off - not sure. Probably within 2-3mm. I'll investigate a bit; if it's off negatively I can just use some spacers and longer bolts for safety. If it's off positively, then there's no easy way (that I know of) around that..

Parts:
Rotor - Centric 12144146 (or 22744146L/22744146R for slotted and drilled)
Caliper - Centric 14244263/14244264

If I get crazy I may go "rent" a caliper and rotor from the local parts store and test fit them this weekend.

Last edited by Paul1114; 10-10-2014 at 12:21 AM.
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post #8 of 67 (permalink) Old 10-10-2014, 06:59 PM Thread Starter
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One more front option:

2005 RX330 Disc (just over 12.5" diameter) and caliper. Need to check out spacing; this one (unlike the Camry one) will undoubtedly need a custom bracket/adapter.

This would be a billion times easier if anyone posted actual blueprints/dimensions for calipers online like they do for rotors.

Last edited by Paul1114; 10-10-2014 at 07:07 PM.
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post #9 of 67 (permalink) Old 10-24-2014, 01:07 AM
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I have looked at my RX330, and see if the calipers and discs would work, but the caliper mounts on the spindles is different, I measured with a digital caliper and it's pretty far off. People have mention the back spacing of the Camry disc could cause rubbing issues. I have looked at Corollas, Matrix and RAV4s to see if certain models have compatible brakes. R1 concepts used to have great diagrams of measurements, but since they upgraded their website those diagrams aren't available any more. I've been doing crazy research too, even visiting junk yards and comparing.
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post #10 of 67 (permalink) Old 10-24-2014, 06:12 PM Thread Starter
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I seriously doubt the 2-3mm of spacing on the camry discs will cause issues since it's spacing inward (away from the wheel). I'll grab a set if one comes up at the salvage yard, but I have a hard time getting motivated about it since it's such a small upgrade.
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