Stop Tech Brake Upgrade - Any experience?

[VFR750]

New StopTech Brake Options for Early Porsche 911

I've read the various threads on brake upgrades, and certainly appreciate Bill V's assessments. And now I'm going to ask about the newer Stop Tech options.

This is what I think today: I don't know enough yet, and I would like some rational input.

Seems a Level 1 Front would be a nice upgrade for a track use 911SC. Stop Tech is a respected brand, and many different pads compounds fit the ST-42 caliper.

$2100 complete kit - rotor, calipers, brackets, brake lines, bolt on and go.

The DR-22 pads are larger in size, but the main advantage appears to be the much thicker rotor (28mm!) which addresses the rotor side of the heat-rejection equation. Stop Tech says the Level 1 fronts can be used with the stock rear brakes and no change to the master cylinder.



Level 2 fronts , looks even better, but I'd assume the f/r brake bias would really be messed up without the Level 1/2 rear upgrade (both rear upgrades share the ST-42 caliper on wider rear disks ). Much larger pad area and ~5mm thicker. Shares the rotor with the Level 1 kit. So this is a pad volume upgrade on top of the rotor upgrade.

I am leaning towards the Level 1 upgrade; anyone have experience they'd like to share?

Background:
I am currently driving a fairly high powered SC with Stock SC brakes with Motul 600 fluid, and Hawk HT-10 pads. Anything less has me fading brakes at Lime Rock and Watkins Glen.

[DocG]

In my head I have asked Bill V this question several times. I would be very interested to hear his thoughts. My other inquiry would be what about using a dual master with adjustable bias to maintain the appropriate bias?

[johnsd]

VFR750 - what did you go with? I'm looking at the StopTech and would love your feedback.
Muchos gracias!

[Carbster09]

I am thinking about a brake upgrade myself on my 71 T. I saw a hot rodded SC, backdate w StopTech set up at the Targa Cali and it was sweet!

[ClickClickBoom]

Go about 30k miles on my Stoptech drilled rotors and Pagid Orange pads. They work like boat anchors, no muss no fuss.

[Jeff Alton]

Have not used any of the Stoptech BBKs for the aircooled cars. But have used numerous kits on BMWs, Boxsters and other later model cars. Porsche pad shapes fit most of their calipers creating a wide selection of pad choices. Been very impressed with these kits. Will be running a set on our shop Boxster Race Car (which will have well over 350HP)

Their standard size drilled rotors/performance rotors are just the standard Centric parts with holes or slots put in them....

[VFR750]

Wide-A front calipers
24mm wide Carrera (84-89) disks
Pagid RSL-29 (yellow) pads
Castrol SRF brake fluid
Stock master cylinder
Stock master cylinder brake booster
Leeds Bandit vacuum brake pump

Pegasus custom-made flexible brake lines replace the hard lines to the caliper so I can remove the calipers without disconnecting the brake lines.

So far this works very well at lime rock, Watkins glen and Thompson motor speedway.

Worked wonderfully under heavy braking and trail braking. Very solid and trust worthy.

Front pads wore out in ~650 miles of track use. Rear pads half as much wear. Pagid RSL-29 are excellent on the track and pretty good on the street.


Unfortunately I did have some pad transfer, which may have happened when I locked up a front wheel. It was raining at Watkins Glen, and I touched the paint line heading into turn one. After that I developed a slight shudder. Now, I have a shudder under light braking. Under heavy braking it does not seem as severe and allows full brake application.

Could have been the rain coupled with high energy input.

I stuck with the first upgrade for a SC and it does seem to work.

If I do the next upgrade I will use 996 Carrera calipers and Rebel Racing conversion kits to put on massive 309x28mm floating rotors. But that is on hold for now

[ClickClickBoom]

I also added this kit. During extended street Hooliginasinm, runs, downhill I could overwhelm the stock brakes, causing them to fade and smoke like crazy. Never could do that to the Stoptech/Pagid Orange setup,with this kit they stay stupid cool:
https://www.elephantracing.com/porsche/911/brake-cooling-kit-for-911/
Quick and easy to install.

['76 911S 3.0]

I have the Level 2 kit on the front only on my '76. These fit under my 15x6 cookie cutters, pedal feel is about the same compared to the stock calipers. I was experiencing fade with my stock brakes after hard driving in the canyons, haven't with these. I have stock brakes in the rear with matching pad compound to the Stoptech kit up front. 19mm master cylinder without a booster.

Very easy kit to install (had to remove the front dust shield but other than that, a direct bolt on affair).

[chrismorse]

Originally Posted by ClickClickBoom

Go about 30k miles on my Stoptech drilled rotors and Pagid Orange pads. They work like boat anchors, no muss no fuss.

Hi Clickclick,
Are these the curved vane and drilled rotors, or the straight vane rotors. I have been curious about the amount of difference curved vaning will make.
Did you opt for the Cryogenically treated rotors?

I had to draw the line before the BBK on my restomod, so am curious about the stop tech rotors.
Thanks
Chris

[Integral]

I actually bought the car from the guy who's son engineered these kits (using my now car).

BLUF: Buy them - they're amazing. I have the Level 1 kit and they're way more than sufficient for such a light car (84 carrera); street/track/otherwise - they're awesome.

I wish my 996tt had such a simple time braking as this kit...

The stoptech kit is easy on fluid and while I've never tracked the car, I have some roads that I'm able to work them very hard and they don't flinch. For the price and ease of install, they're going to be hard to beat.

If anyone is in the San Diego area, PM me and I'll let you check em out...I'm usually at a cars and coffee or some car related thing most weekends.

[ClickClickBoom]

Originally Posted by chrismorse

Hi Clickclick,
Are these the curved vane and drilled rotors, or the straight vane rotors. I have been curious about the amount of difference curved vaning will make.
Did you opt for the Cryogenically treated rotors?

I had to draw the line before the BBK on my restomod, so am curious about the stop tech rotors.
Thanks
Chris

Straight, no cryogenically, as in engineering, you only want to solve the problem and have a little margin. Controlling the cooling air, in and out is the first step. If that’s not enough, materials(removed/added/changed). Drive the car in the most demanding application you will ever do. Get a decent laser thermometer, see where you are. Build to needs. 80% of the people driving 911 don’t get the brakes even warm. People driving minivans in the mountains, regularly have smoke boiling out of the wheels on downhills. Technique.

[3rd_gear_Ted]

The bigger rotors and good air flow to them is 80% of full braking optimization for the track.

[ClickClickBoom]

As soon as the Beverly Hills Estate sells gonna get 4 of these:
https://youtu.be/QIc-9UuLSmg

https://youtu.be/SRA5CFLYkUQ

[chrismorse]

Originally Posted by ClickClickBoom

As soon as the Beverly Hills Estate sells gonna get 4 of these:
https://youtu.be/QIc-9UuLSmg

https://youtu.be/SRA5CFLYkUQ

Outrageous - stunning example of low cost 3 d printing - wonder if I can put a set of those calipers on my 1.7 914 stop on a dime and give you 9 cents back.

Sorry, been binge eating those stool softeners again....

[-Levi-]

My set came in today, I will report back when I get them installed as well

[911pcars]

Just to keep things in perspective - if you happen to have a Veyron in the garage:

[Gianni at Pelican Parts]

Originally Posted by -Levi-

My set came in today, I will report back when I get them installed as well

Which kit did you end up going with?

We offer a wide variety of StopTech Big Brake Kits on our site.

[-Levi-]

Originally Posted by Gianni at Pelican Parts

Which kit did you end up going with?

We offer a wide variety of StopTech Big Brake Kits on our site.

i know, i bought it from you guys


stoptech level 2a front
87.782.fu.00.r1

level 2 tear
82.785.00e1.r1

pelican didn't have them on the website at the time, but I called it in.