StopTech BBK ST-60 355mm Installed

[drob23]

(Was gonna put this in the track drivers section, but figured the masses might be interested)

Got my StopTechs on, they look awesome and performance so far is great. Had a chance to bed the xp20's, they require a pretty aggressive procedure Rear rotors are on also, and no noise while braking. Ray (awesome owner of rayzer automotive) put some red goo behind the rear xp8's which you can see below, they don't come with anti-squeal shims, decided against using the stock ones. Ray used all 1.5L of the 660 to flush + install the calipers, was it necessary...I don't know...but he did it and I trust his judgement.

Installation - was pretty smooth, although he needed to use the stoptech SS lines in the front to connect to the caliper. So I have some goodridge SS lines that will go to waste I needed 3mm spacers for the wheels to clear the calipers...I guess that's what I get for such a nice concave face. He was able to do the rear caliper without the vagcom parking brake disable, sounds like the piston moved back...dunno. The front pads look extremely easy to swap, just remove 4 bolts and bracket, push back pistons with hand or lever and remove pads. I have the Ti .5 mm shims in there, so hopefully less heat transfer to the pistons - > fluid. Once the rotors heat up, there's an interesting "clicking" noise that happens, which was explained to me as how floating rotors work. Essentially, as the Al in the hat heats up and cools, the hat shrinks/expands in discrete amounts, and slips on the little pins as it overcomes the static friction. It sounds like faint version of those little poppers going off.

All in all, just over 4k to get the setup I have:

$2400 ST-60 355 (thanks to R1 Concepts, definitely the best deal I could find);
$600 F xp 20/1521 R xp8;
$650 JHM rotors;
$60 RBF 660;
$100 .5mm Ti Shims;
$380 Install;

So in the end, I think it was completely worth it, but proof will be in the pudding lol.

Impressions - stopping feels so much better at the pedal, no compliance at all, brake balance feels pretty neutral as it did before. Can't wait to torture test these at Mid-Ohio this weekend One issue I found is a strange noise while cruising on the HWY at around 80 mph, seems to be worse when the car is under power. My tech explained it as noise from the front rotors, the slots to be specific. Sounds slightly annoying, like a very faint buzzing speaker or loose trim piece. I'm not sure if it's the brakes, as I ran the car pretty hard.

Brake porn:
JMH Rotors are strangely slotted in the "wrong" direction relative to the vanes


Brake rotors don't completely fill out the wheel like a proper 380mm kit, but the calipers look gorgeous. Will still work with my 18's in the winter.

[adbender]

Glad to hear the install worked out.

I have "tortured" my 355s on two occasions now at the track. Performed flawlessly with 600 fluid, even on very brake heavy short track. Bias was excellent as I never had any unexepected lock-up.

You should feel confident with this set-up.

congrats.

[infinkc]

very nice!

[drob23]

Glad to hear the install worked out.

I have "tortured" my 355s on two occasions now at the track. Performed flawlessly with 600 fluid, even on very brake heavy short track. Bias was excellent as I never had any unexepected lock-up.

You should feel confident with this set-up.

congrats.

Thank you sir, hearing testimonials like yours definitely instills confidence, especially track driving. I'll make sure to update with regards to daily driving, since I've read about some problems with this kit, especially in the snow-belt. I did notice some noise when I pulled into a parking spot at lunch, but that could be the xp 20's. Will update with how the 1521's feel on the street.

very nice!

Thanks

[mojangles69]

Nice StopTech is good stuff, I'm sure you'll be quite happy with them!

[DEEZ]

Looks great, I have a feeling I'll be going with the same setup here shortly.

[drob23]

Well...the pads squeal real bad when I pull slowly to a stop lol. So definitely will report back once I get the 1251's on there, hoping it's not coming from back but we'll see!

[Need4Speed]

Very nice

cant go wrong with stoptech

[aka5]

Nice, I have the 380 setup, good stuff!

[adbender]

Well...the pads squeal real bad when I pull slowly to a stop lol. So definitely will report back once I get the 1251's on there, hoping it's not coming from back but we'll see!

Did you bed the brakes yet?

[drob23]

Did you bed the brakes yet?

I believe so, even went to the strip and did some 110-20 stops :)

But this was expected with xp20's...

[Leor604]

1521's will cure the noise, but you will likely have to replace the rears too. My rears squeal with XP-10's.

[Mops@Nemesis]

Those rears look great. The ST kit as well. I'd shoot those rear shields with some satin black If anyone else is interested in ST's, or even AP or Brembo, hit me up.

[drob23]

Nice, I have the 380 setup, good stuff!

Wish I could fit those both for performance and looks...18" winter wheel setup FTL

1521's will cure the noise, but you will likely have to replace the rears too. My rears squeal with XP-10's.

Really hoping I don't need to replace rears...probably will just deal with the weird looks if they're noisy lol

[will13k7]

You'll have to tell everyone "they squeak because they're higher performance! really! I have plenty of pad left!".

Nice setup! Got me thinking about finding some matching rear rotors for the front BBK I have on order, but then I should get pads, and brake-lines too, never ends!

[OldSport//]

Congrats, looks great! Do report back on your impressions from the track as well!

[drob23]

You'll have to tell everyone "they squeak because they're higher performance! really! I have plenty of pad left!".

Nice setup! Got me thinking about finding some matching rear rotors for the front BBK I have on order, but then I should get pads, and brake-lines too, never ends!

Haha...yup.

The rotors aren't cheap, but I didn't want rotors which offered no benefit over stock (lw 2 piece, slotted, directional fins, wider air gap, floating (i believe these are floating?)) and I also didn't want the cross drilled (other option from ECS). I was originally hoping to resurface the rears for the new pads, but Ray recommended a new set of rotors, especially for the carbotech compound (which doesn't play nice at all with other pads). So I paid the JHM tax for some good kit. The xp8 pad choice was influenced by the overall brake bias that I was sending forward with the xp20 pads, should help me marginally at the track by moving the bias back.

You can get pads + lines for pretty cheap. If you're doing SS lines in the front, might as well do them in the rear. I.e. you are flushing the entire system, so here's your chance.

Will see though about the noise of the xp8's during DD duty

Congrats, looks great! Do report back on your impressions from the track as well!

Absolutely, can't wait!

[drob23]

These brakes were incredible on the track. Mid-Ohio is a very technical course, without a lot of heavy brake zones. I was absolutely over-braking the course during my first couple sessions. As the weekend progressed, I became a lot smoother and was carrying more speed and generally braking less. Average speed was pretty high, so I believe airflow was good on this track. The only real braking zone was on the back straight...I was carrying about 120 into the concluding turn (was lifting during the last 1/3 because I'm a noob and didn't need to be going 140).

Absolutely zero brake fade, wasn't even smelling the normal "brake" smell in the paddock. The rotors were constantly "popping" as they cooled down. The brakes did take some finesse to apply smoothly, pretty heavy pedal without much compliance. Loved these brakes, can't say anything bad about them with respect to track driving.

Will throw the 1521's in there and see if the car no longer sounds like a school bus

[VADERS4]

I purchased my Stoptech ST-60 380mm set-up from Modbargins and they will be installing those and the Stoptech rear cross-drilled rotor and pads sometime next month.......I can hardly wait!!! I also went ahead and had Alan order the H&R OE springs and they will be installing those as well!! I am really loving the look of the car at this point!! I can't wait!!!!!

[Mops@Nemesis]

Nice to hear you are more than pleased

[VADERS4]

And THANKS Mops for the codes for Adams products!!! It has saved me a ton of money lately on those products!!!

[Mops@Nemesis]

And THANKS Mops for the codes for Adams products!!! It has saved me a ton of money lately on those products!!!

Haha, for sure! Exciting times coming up for you You have the 13 one, yes? I can also do pretty well on Brembo, AP and ST BBK kits.

[GeoJoe]

I've recently swapped my pads from the SR32 track version back to the street pads in my StopTech 380 kit. It was very easy and I bled the system at the same time.

Hard to believe that a BBK this bad ass is so simple to maintain.

[drob23]

I've recently swapped my pads from the SR32 track version back to the street pads in my StopTech 380 kit. It was very easy and I bled the system at the same time.

Hard to believe that a BBK this bad ass is so simple to maintain.

Yea, I considered the stoptech racing pads, but didn't see many reviews and most guys I spoke with just said to go carbotech. With that said, I have an extra set of ST street pads if anyone wants them on the cheap.

You're using the power bleeder, correct? One of those is probably in my future. My tech recommended bleeding out at least the fluid in the calipers, although honestly, mid-ohio is so easy on brakes that I doubt I put too much stress into the system. The Ti shims also probably helped.

The only thing I need to do now is clean the car and those beautiful calipers, so much brake dust and rubber from the indy cars practicing days before

[westwest888]

I think you are the 2nd member to pick up the JHM 2 piece rear rotors. I'm running those with Pagid RS19 yellow in the rear. After a year of use I still have 75% of the pad material on the rears.

[drob23]

I think you are the 2nd member to pick up the JHM 2 piece rear rotors. I'm running those with Pagid RS19 yellow in the rear. After a year of use I still have 75% of the pad material on the rears.

There are quite a few, mostly guys looking for fastest 1/4 times. jones2012 and some others. I'm interested to see how these rotors wear with the xp8 pads.

[will13k7]

I didn't want rotors which offered no benefit over stock (lw 2 piece, slotted, directional fins, wider air gap, floating (i believe these are floating?)) and I also didn't want the cross drilled (other option from ECS)... So I paid the JHM tax for some good kit

Seems like JHM has the market on lock if you want two piece slotted rear replacement rotors? I didn't see any other options after hours of googling!

[Jones2012s4]

Seems like JHM has the market on lock if you want two piece slotted rear replacement rotors? I didn't see any other options after hours of googling!

Look harder...

ECS tuning has front and rears

USP Motorsports sells the Girodisc floating 2-piece rotors, which don't seem to be listed on website.


That said, more than happy with my JHM pieces.

[audistealth]

Look harder...

ECS tuning has front and rears

USP Motorsports sells the Girodisc floating 2-piece rotors, which don't seem to be listed on website.


That said, more than happy with my JHM pieces.

How much for those USP Girodiscs?

[Jones2012s4]

How much for those USP Girodiscs?

Have to contact USP, I remember 850$ for fronts.

[drob23]

There is also racing brakes



http://www.racingbrake.com/Two-piece...-11-p/2206.htm

Quite a few rotor options. I went with JHM because I've heard great things about these rotors, and wanted to support a tuner company that might start making more B8 parts.

[will13k7]

sorry, I should have been more clear, I did see other variations on"slotted" rotors and some slotted and drilled ones (ECS), but not any with just normal looking slots and only slots. I want to match my slotted brembos up front. What I consider "normal" slotting:



I did see the stoptech and powerslot ones, the hat is different than the brembos/JHMs and it looks like those ones are 1-piece?

I'll probably need to pay the "JHM tax" to get the matching look I want.

Edit: I did come across the Girodisc floating 2-piece rotors thread, but as mentioned, the USP website indicated they don't have that product anymore and I didn't read any mention of rear rotors, I guess I might need to make some calls.

Thanks Guys!

[drob23]

sorry, I should have been more clear, I did see other variations on"slotted" rotors and some slotted and drilled ones, but not any with just normal looking slots and only slots. I want to match my slotted brembos up front. What I consider "normal" slotting:



i did see the stoptechs and powerslot ones, the hat is different than the brembos/JHMs, but it looks like these ones are 1-piece?

Those are definitely 2 piece. You can tell by the screws that connect the outer rings to the inner Aluminum hats. There are *a lot* of different ways to make floating rotors, lots of technologies to connect the inner rotors with the outer ones. The RS5 rotors use radial coupling, similar to what I saw on the panamera:



If you saw Hamilton crash during qualifying at the German Gran Prix a couple weeks ago, it was due to a failed Brembo rotor I believe. So even the big boys fuck up. Apparently, Brembo had switched rotor suppliers, so even the "brake companies" buy some of their components from suppliers.

[drob23]

Changed the pads today back to 1521's, was pretty easy, just had to slightly nudge the pistons back to get the pads out. Took about as long to change pads as it did to raise and remove each wheel. Haven't had a chance to drive yet, from what I've been told, the xp20's probably took the bedded pad material right off during the 3 hr drive home. So I'll do some reasonable bedding with the new pads and should be good as gold :D

Here's the shims and xp20's after pulling them out


Pads look to be pretty thick, close to original, but I should probably invest in a micrometer to measure the thickness (or some tool/technique?).

[drob23]

New pads are incredible noisy, even when not on the brake pedal going 15 mph. Need to figure out whether I should grease the system, figure out some kind of anti-squeel shim, or re-bed the pads. Carbotech said I didn't need to do anything when switching from the xp20s to 1521's. I also can't rule out the rear xp8's

[twei]

Did you ever solve the squealing? I'm about to install Trophy 380 kit. Wondered about get additional rotor/hat just for the track pads.

[drob23]

Did you ever solve the squealing? I'm about to install Trophy 380 kit. Wondered about get additional rotor/hat just for the track pads.

Yup, was completely due to the xp8's in the rear. Swapped 1521's back there and quiet as a mouse in a house. Also no dust!

[twei]

Yup, was completely due to the xp8's in the rear. Swapped 1521's back there and quiet as a mouse in a house. Also no dust!

Do you still run the rear xp8's for the track? Or do you keep 1521's for both on and off.

[drob23]

Do you still run the rear xp8's for the track? Or do you keep 1521's for both on and off.

I'll swap the track pads in/out before/after track days. For now it's quattro season where I live, so no track time till the spring

[mact3333]

Do you still run the rear xp8's for the track? Or do you keep 1521's for both on and off.

Vancouver WA huh?...we are neighbors(Camas)...I am running yellow 380mm Stoptech