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Old 03-24-2017, 06:45 PM   #52
Quebster
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upgrade rotors?

Well... here's the plan for my DD "track car" (lol) I'm going to stick with stock calipers, I have PP up front and non-PP rear. Currently running RBF600 fluid, plan to switch to SRF next flush. I have stainless lines up front, but not in the rear, though I do have stainless lines laying around for the rears.

I'm going to get the stoptech slotted front PP rotors and the stoptech slotted non-PP rear rotors. I plan to run Porterfield R4-S pads all around, but I also plan to get the R4 (track version) and swap out the fronts for track weekends, and keep the street version on for AutoX. I also plan to install the stainless rear lines on next flush.

I also installed some brake ducting over the last couple of days... I had to settle with the way I did it in the picture below, I simply couldn't find a good place to mount the 3" ducting close to the caliper without something hitting it, like the tire on turn in, or the drive shaft, or worrying about the endlinks rubbing it raw. This is still better than nothing methinks, dustshileds obviously removed, and plan to remove rear rotor dust shields when I upgrade them. I think if I wanted, I would have better luck with a 2" duct, and could get a 3" to 2" adapter, mount it in the tire well, and run a 2" duct to the rotor:



I think this should suffice for what I will be doing with the car! i.e. a non-track dedicated DD car that I still want to do good work with on the track. Always trying to find that perfect balance.
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Old 03-24-2017, 07:24 PM   #53
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Please post up when you have some thoughts on the R4 pads. I like a man with a plan and yours seems to hit the sweet spot between street and track.

Curious, what are you doing about tires? Most people that track have a set of track wheels/tires.
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Old 03-24-2017, 09:11 PM   #54
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Quote:
Originally Posted by geebob View Post
Please post up when you have some thoughts on the R4 pads. I like a man with a plan and yours seems to hit the sweet spot between street and track.

Curious, what are you doing about tires? Most people that track have a set of track wheels/tires.
Will do. Currently just on Firehawk Indy 500 340 treadwear tires, 245/40/18. I plan on having a dedicated track setup at some point, likely later in the year though. I want to see how long these Firehawks will get me. I've been pretty happy with their performance for my level so far!
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Old 04-22-2017, 12:28 AM   #55
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Brakes are all here! Stoptech slotted front and rear rotors and Porterfield R4-S pads all around, with R4 track compound front pads for track days. Super excited to see how these do!




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Old 04-24-2017, 07:27 AM   #56
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Put my brake rotors and pads on today on all 4 corners.

Btw, from my understanding, the Stoptech slotted rotors are definitely an upgrade from the softer OEM rotors. I'm looking forward to using these on track with the race pads also next track day.



My rotors were pretty shot:



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Old 04-24-2017, 12:57 PM   #57
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Quote:
Originally Posted by Quebster View Post
Btw, from my understanding, the Stoptech slotted rotors are definitely an upgrade from the softer OEM rotors. I'm looking forward to using these on track with the race pads also next track day.
Let me take the liberty of asking an iconoclastic question,
how do you know this before even hitting the track?
From my understanding, the Stoptech slotted rotors are
basically the exact same stuff as stock, they just come
with slots. I am fully aware that there are some slight
differences in the alloying, but I'm also aware these are
only minor, since any rotor is made from cast iron mainly
(so Fe and C are the main alloying constituents). Let me
add, I did run some 'uprated' rotors in the past (Tarox).
That probably makes me having realistic expectations.
However, they do actually look nice and I hope they will
sustain the stresses on track. Again, a proper ventilation
will help.

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Old 04-24-2017, 03:47 PM   #58
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Again, just "my understanding," based on what what my shop and various others have told me, besides yourself of course. We'll see how they do soon enough!
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Old 04-24-2017, 06:57 PM   #59
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Let us know differences in lap times, braking zones, speeds, feel, etc. If you can.

I agree you won't feel a difference in rotors. Similar conditions will tell if they are better or not.

Quote:
Originally Posted by Quebster View Post
Again, just "my understanding," based on what what my shop and various others have told me, besides yourself of course. We'll see how they do soon enough!
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Old 04-25-2017, 05:51 AM   #60
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I'll be back at the track at the beginning of next month. Will let everyone know how everything holds up, especially over time. Will also be using dedicated track pads, so that will be different as well.

I'm positive these are at the very least a small upgrade, whether they're a slightly harder material, or from the slots alone, which do actually help. They do look nice (not why I bought them but definitely a plus) and since my old rotors were pretty shot, I actually needed a replacement, so it's not like I wasted money. So that's my justification

If you wanted a serious upgrade for stock rotors you could go with Emmannuele Design's 2-piece directionally vented rotors for 3x the cost, or of course go all the way with a BBK. Those are the options I'm aware of.

There are also the Clubsport's brakes, which are 2-piece but non-servicable, and also directionally vented but the left and right disks are identical, meaning one side will be vented the wrong way. It's like they almost got it right, but not quite. Badly, correct me if I'm wrong here since you actually have the pleasure of owning that bad boy, which unfortunately lost it's Nurburgring lap record to a Honda the other day

Oh there's also the ECS 2-piece rotors for a bit less than the ED ones that are drilled and slotted....... directionally vented too but.... no thanks.

I chose to go with the mild upgrade with dedicated track pads. Maybe not a big upgrade, but definitely an upgrade, rotors included. We'll see how they do very soon!

By the way... what do y'all know about cryo-treated rotors?
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Last edited by Quebster; 04-25-2017 at 06:23 AM.
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Old 04-25-2017, 12:49 PM   #61
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cryo-treated rotors are much stronger than the OEM rotors. track pads destroyed my OEM rotors in 1 track weekend. The pads ate thru the rotor and put a lip on the rotor. I upgraded to cryo treated blank rotors and have not had an issue since. Running the same Hawk track pads too.
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Old 04-25-2017, 01:45 PM   #62
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The only difference you will see on the track is going to come from better pads. Oem rotors are fine for 99% of drivers going to any HPDE course or open lapping day. Pads and good fluid will make all the difference.
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Old 04-25-2017, 05:46 PM   #63
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Quote:
Originally Posted by breaking badly View Post
Let me take the liberty of asking an iconoclastic question,
how do you know this before even hitting the track?
From my understanding, the Stoptech slotted rotors are
basically the exact same stuff as stock, they just come
with slots. I am fully aware that there are some slight
differences in the alloying, but I'm also aware these are
only minor, since any rotor is made from cast iron mainly
(so Fe and C are the main alloying constituents). Let me
add, I did run some 'uprated' rotors in the past (Tarox).
That probably makes me having realistic expectations.
However, they do actually look nice and I hope they will
sustain the stresses on track. Again, a proper ventilation
will help.

Stoptechs should have the their "Aero" directional vented design instead of the straight venting on OEM rotors.
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Old 04-25-2017, 06:04 PM   #64
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The Stoptech Sport rotors also have curved directional cooling vanes which also help dissipate heat on track.
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Old 04-25-2017, 06:14 PM   #65
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OP - Quebster - Do the Porterfield pads have properly sized backing plates and retaining clips built into them? My G-Loc R12 pads have crap backing plates that rattle around all over the place and make my car sound like it's falling apart. They work great on track... but this annoys me.
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Old 04-25-2017, 06:32 PM   #66
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hate to hijack but perhaps relevant

When putting on aftermarket brand brake parts do you disable the brake pad warning sensor? I'm not even 100% sure how this sensor works, guessing some sort of open circuit but it would seem aftermarket components would impact this sensor and throw off false signals?
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Old 04-25-2017, 08:04 PM   #67
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If your pads come without a sensor, just plug your old stock ones' in if it
isn't worn down. If the old sensor is worn (opened circuit) solder both ends
of the wire and put some insulation over. This way there's no light flashing,
no need to code and the plug is protected from the elements.

There's no huge advantage of Cryo treatment. It's a very minor advantage.
Claiming Cryo treted rotors are 'much stronger' - where's the prove?
Don't let marketing BS fool you. Cryo is significantly cheaper compared to
heat treatment as performed by Tarox, AP or PFC and higher-end Brembos.
That's why Cryo is used. No single higher-end product comes with a 'cryo
treament'. That says it all. Don't get me wrong, it's not bad. But don't tell
they're 'much stronger'. Anyway, 'strength' isn't any serious issue with cast
iron brake rotors. Try bending a cheap $20 one.

Quebster: Yes, that's true. Like former RS3/TT-RS rotors the CSS/R PP ones
only come in one guise instead of two. One single PN. Therefore one side is
wrong, thus running hotter. Still a good rotor though, good enough for 7:48
laps on the Nurburgring. Not a racing rotor though.
A real 'serious upgrade' would be AP Racing*, Brembo*, Alcon, Performance
Friction or Movit - two-piece of course. You'd pay 1k for a pair though.


*their racing devision, not the stock equivalent stuff



Quote:
Originally Posted by tmw2442 View Post
Stoptechs should have the their "Aero" directional vented design instead of the straight venting on OEM rotors.
I doubt they have it, but I'm willing to learn. Their website doesn't specify
which rotors come with directional vanes and it's highly uncommon at least
for affordable (one-piece) rotors to have this technology. Even Tarox don't
come with directional vanes (except their two-piece rotors of course). That
is why this must be questioned. Quebster could help us out with some proper
pics. Admitted - if the Stoptechs do have actually directional vanes (both
sides correctly would mean different part numbers left and right), they'd be
good value.


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Old 04-25-2017, 08:05 PM   #68
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Quote:
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hate to hijack but perhaps relevant

When putting on aftermarket brand brake parts do you disable the brake pad warning sensor? I'm not even 100% sure how this sensor works, guessing some sort of open circuit but it would seem aftermarket components would impact this sensor and throw off false signals?
I have the same question. I'm still not entirely sure that the north american cars have a pad wear sensor. I only recall seeing one wire going to the brake area and thought it was like a wheel speed sensor for the ABS control (could be wrong).

If a sensor is required I'll cut the harness clip off of the stock pad sensor and loop the wires to create a "sensor delete" plug.
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