StopTech Big Brake Kit 328x28 Weights and Pics :) - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Racecomp Engineering · 06-08-2015, 10:52 AM

We've run Stoptechs on many of our project cars in the past and we have a front and rear trophy kit on our Project WRX. Dan runs them on his ridiculous GD chassis STI.

Stoptechs are not a rare sight at the track. They work very well.

- Andrew

Sleepless · 06-08-2015, 12:36 PM

Quote:

Originally Posted by OkieSnuffBox

Legit question, how come melting the dust boot on these is a concern, yet with other things I've tracked with stock calipers the OEM dust boots aren't a problem?

I've been hardcore tracking cars with dust boots for 15 years and never had a concern about the boots cracking. They don't "melt" as as some have alluded; they simply crack on the outer edge.

So, for me, it is not a concern. As far as I can tell, only people that sell race kits make it a concern.

OkieSnuffBox · 06-08-2015, 12:40 PM

Quote:

Originally Posted by Racecomp Engineering

We've run Stoptechs on many of our project cars in the past and we have a front and rear trophy kit on our Project WRX. Dan runs them on his ridiculous GD chassis STI.

Stoptechs are not a rare sight at the track. They work very well.

- Andrew

Quote:

Originally Posted by Sleepless

I've been hardcore tracking cars with dust boots for 15 years and never had a concern about the boots cracking. They don't "melt" as as some have alluded; they simply crack on the outer edge.

So, for me, it is not a concern. As far as I can tell, only people that sell race kits make it a concern.

Excellent, that's what I suspected. Thanks for confirming.

CSG Mike · 06-09-2015, 01:31 PM

Quote:

Originally Posted by Sleepless

I've been hardcore tracking cars with dust boots for 15 years and never had a concern about the boots cracking. They don't "melt" as as some have alluded; they simply crack on the outer edge.

So, for me, it is not a concern. As far as I can tell, only people that sell race kits make it a concern.

It just means you've never gotten them hot enough to have that type of failure.

Just because you've never done it, doesn't mean someone else hasn't.

CSG Mike · 06-09-2015, 01:33 PM

Quote:

Originally Posted by OkieSnuffBox

Legit question, how come melting the dust boot on these is a concern, yet with other things I've tracked with stock calipers the OEM dust boots aren't a problem?

Melting dust boots with ANY car or caliper is a concern. The question is, how hot are you getting your brakes? If you're not getting them hot enough, then you'll never melt or burn off your dust boots.

On the other extreme, I've ran my OEM S2000 calipers without the outer dust boots for nearly 5 years, without issue. If I replace the dust boots, I literally burn them off in one track day. Not melt, or crack, but burn them off and all that is left is ash.

AZP Installs · 06-09-2015, 01:51 PM

In the realm of this discussion, for these cars (not s2000s or misc race cars) these kits are more than enough even for high levels of skills.

Mike

Sleepless · 07-06-2015, 03:43 PM

Update:
- Brake feel is worlds better than stock (on the same XP12 pads)
- No brake fade (on NT01 and Star Spec tires), despite running faster than ever before (due to some coaching

- After 4 days the pads are less than half worn; used to go through XP12s in 3-4 track days
- More likely to squeal louder than stock calipers with XP12s

Sleepless · 10-17-2015, 03:13 PM

UPDATE:
- XP12s lasted 7 days on NA power with TF brake ducts (double what I got with stock brakes and the pads are the same price

- Dust boots look great

Sleepless · 06-06-2016, 04:49 PM

UPDATE:
- Another 6+ track days on the XP12s but now with JRSC power

Switched to APR duct kit since TF would not work with JRSC
- Dust boots still look fine after 12 track days
- Rotors look good too.

Brake feel is really nice and clearly the brakes are no where close to being over taxed.

Very pleased, and the cost was great too ($1800 and easy to install)

Sleepless · 08-04-2016, 04:00 PM

UPDATE:
- 5+ track days on the XP12s
- Dust boots still look fine after 17 track days
- Rotors look good too.

BTXP.XD · 11-13-2016, 05:14 PM

Does anyone know if the ST40 calipers are just direct bolt on? Like I can get diff size rotors etc? Thanks guys

Apex-Apex · 11-14-2016, 03:26 AM

Quote:

Originally Posted by BTXP.XD

Does anyone know if the ST40 calipers are just direct bolt on? Like I can get diff size rotors etc? Thanks guys

No, if they were direct bolt on, how will you space your caliper for the different size rotors?

n0thing · 11-21-2016, 09:55 PM

Can you swap in a 1-piece rotor into the ST40? if so, what part#/equivalent?

07-06-2015, 03:43 PM	#35
Sleepless Senior Member Join Date: Apr 2014 Drives: 2014 BRZ Location: Redmond, WA Posts: 639 Thanks: 299 Thanked 392 Times in 229 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Update: - Brake feel is worlds better than stock (on the same XP12 pads) - No brake fade (on NT01 and Star Spec tires), despite running faster than ever before (due to some coaching - After 4 days the pads are less than half worn; used to go through XP12s in 3-4 track days - More likely to squeal louder than stock calipers with XP12s __________________ Pete 14 Track BRZ (Build Thread) cmslaptimer.com

10-17-2015, 03:13 PM	#36
Sleepless Senior Member Join Date: Apr 2014 Drives: 2014 BRZ Location: Redmond, WA Posts: 639 Thanks: 299 Thanked 392 Times in 229 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	UPDATE: - XP12s lasted 7 days on NA power with TF brake ducts (double what I got with stock brakes and the pads are the same price - Dust boots look great __________________ Pete 14 Track BRZ (Build Thread) cmslaptimer.com

06-06-2016, 04:49 PM	#37
Sleepless Senior Member Join Date: Apr 2014 Drives: 2014 BRZ Location: Redmond, WA Posts: 639 Thanks: 299 Thanked 392 Times in 229 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	UPDATE: - Another 6+ track days on the XP12s but now with JRSC power Switched to APR duct kit since TF would not work with JRSC - Dust boots still look fine after 12 track days - Rotors look good too. Brake feel is really nice and clearly the brakes are no where close to being over taxed. Very pleased, and the cost was great too ($1800 and easy to install) __________________ Pete 14 Track BRZ (Build Thread) cmslaptimer.com

08-04-2016, 04:00 PM	#38
Sleepless Senior Member Join Date: Apr 2014 Drives: 2014 BRZ Location: Redmond, WA Posts: 639 Thanks: 299 Thanked 392 Times in 229 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	UPDATE: - 5+ track days on the XP12s - Dust boots still look fine after 17 track days - Rotors look good too. __________________ Pete 14 Track BRZ (Build Thread) cmslaptimer.com

11-13-2016, 05:14 PM	#39
BTXP.XD Senior Member Join Date: Mar 2015 Drives: 14' FRS Location: Markham, ON Posts: 249 Thanks: 37 Thanked 27 Times in 25 Posts Mentioned: 2 Post(s) Tagged: 2 Thread(s)	Does anyone know if the ST40 calipers are just direct bolt on? Like I can get diff size rotors etc? Thanks guys __________________ NBeyond https://www.instagram.com/nbeyond__/ Support us for daily cars + upcoming clothing line.

06-08-2015, 10:52 AM	#29
Racecomp Engineering Join Date: Nov 2011 Drives: 2016 BRZ, 2012 Paris Di2 & 2018 STI Location: Severn, MD Posts: 5,520 Thanks: 3,542 Thanked 7,415 Times in 3,033 Posts Mentioned: 311 Post(s) Tagged: 9 Thread(s)	We've run Stoptechs on many of our project cars in the past and we have a front and rear trophy kit on our Project WRX. Dan runs them on his ridiculous GD chassis STI. Stoptechs are not a rare sight at the track. They work very well. - Andrew

06-09-2015, 01:51 PM	#34
AZP Installs Join Date: Oct 2011 Drives: '11 STi->'14 BRZ \| '14 Touareg TDi Location: Kenilworth, NJ Posts: 1,269 Thanks: 359 Thanked 558 Times in 371 Posts Mentioned: 49 Post(s) Tagged: 0 Thread(s)	In the realm of this discussion, for these cars (not s2000s or misc race cars) these kits are more than enough even for high levels of skills. Mike

11-21-2016, 09:55 PM	#41
n0thing Senior Member Join Date: Jan 2014 Drives: Subaru BRZ Location: Markham Posts: 394 Thanks: 48 Thanked 90 Times in 53 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Can you swap in a 1-piece rotor into the ST40? if so, what part#/equivalent?

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