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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 08-01-2012, 05:30 PM   #1
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To big brakes, or not to big brakes.

Brakes are pretty much toast at this point, looking at replacement.
Is it worthwhile to source some viggen / 9-5 aero calipers and carriers, or just get some really good stock sized brake hardware? Car is a 176k 9-3 coupe.
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Old 08-01-2012, 05:38 PM   #2
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Love my big brakes on my viggen, huge improvement over stock viggen brakes. The rear I went with the 9-5 aero brakes.....
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Old 08-01-2012, 05:51 PM   #3
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is the ebrake affected when you switched calipers
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Old 08-01-2012, 06:04 PM   #4
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is the ebrake affected when you switched calipers
I know on the ng900 you do, should be roughly similar to the 9-3. I just flipped the bracket that holds the ebrake spring, and that was it.
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Old 08-01-2012, 06:22 PM   #5
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Love my big brakes on my viggen, huge improvement over stock viggen brakes. The rear I went with the 9-5 aero brakes.....
So you just got 9-5 Aero rears? IIRC, the Aero fronts are the same as Viggen.
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Old 08-01-2012, 06:56 PM   #6
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Front Viggen/Aero calipers and rotors are a great bang-for-the-buck improvement. Add some Hawk pads and a full brake fluid exchange and your good to go. Want to go a little further, grab the Aero vented rear setup and some stainless brake lines. That's what I have along with koni/vogtland springs. The car stops hard and flat, and has great balance.
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Old 08-01-2012, 07:09 PM   #7
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Weird, the brakes were done on my car by the previous owner about 25k ago. Stopping power just isn't there. Also doesn't help I have 176k dampers on the car, nose dives on braking and shoots for the sky on acceleration.
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Old 08-01-2012, 07:20 PM   #8
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How are your rear calipers? Make sure they aren't frozen.
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Old 08-01-2012, 08:15 PM   #9
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I have ap racing racing front brakes on my car.

A good set of pads do help out a lot with stopping power, not as good as a big brake kit but good pads do help.

If money is tight and if your suspension is stock w/o a doubt..... At least buy some new shocks for your car, preferably with springs and just buy some good pads for stopping better. Depending on the tires you run just a good set of pads might be at the limit of your tires....
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Old 08-01-2012, 09:08 PM   #10
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You haven't been in my car when I get on the brakes, have you? I have Viggen fronts with HPS pads, stock size rears with EBC Redstuff, stainless steel brake lines and super blue fluid. And it's way better. I actually think the SS braided lines were the best part of the upgrade.
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Old 08-01-2012, 09:31 PM   #11
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Yes, do the upgrade. It's worth it. Also do you still have good feel in your pedal? Maybe the brake fluid is cooked (old)? Master cylinder calling it a day?
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Old 08-01-2012, 09:48 PM   #12
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Going to bleed some brakes and see what happens. Pedal is solid, more solid than my Taurus. But I can just stand and put all the force I can muster on the pedal, the car nose dives bad but no ABS and the speedo just creeps down. Pedal remains firm/doesn't sink or get spongy. Stomping on the Taurus or any other car in my family yields my face in the dash and ABS pumping something fierce.

Granted I am running those really sticky hankooks, but I would expect stomping the crap out of the pedal to yield some ABS work.

What car am I really jealous of the braking power of? My dad's 2010 Ford Fusion Hybrid. The thing is a tank, and extra heavy at the curb from the massive battery pack in the trunk and all the traction motor bs under the hood but literally stops on a dime. One time I had to do a double foot stomp for deer in that thing and holy shitsnacks. The regenerative braking plus hydraulic brakes working in tandem caused me to brace as much as I could on the steering wheel to keep the seatbelt from cutting me in half and after I stopped I thought I was going to puke.
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Old 08-02-2012, 05:47 AM   #13
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Brakes can never be to big, but some kits require bigger/different off set wheels. If you have the money, go for it.
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Old 08-02-2012, 06:20 AM   #14
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I'm betting that there is something wrong with his stock system. Even the small stock brakes have enough stopping power to lock up/engage abs at least once. Remember bigger brakes become a great advantage when high speed, continuous, or repetitive hard braking comes into play.

If I were you I would take a good look at my pads, calipers, and rotors. My money is on one or more seized calipers and/or an issue with your brake master/booster.
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Old 08-02-2012, 06:44 AM   #15
 
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If the car is an automatic 9-3, the vacuum booster on the right end of the head might be failing. Bad braking is an early symptom of that.
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Old 08-02-2012, 07:37 AM   #16
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I'm betting that there is something wrong with his stock system. Even the small stock brakes have enough stopping power to lock up/engage abs at least once. Remember bigger brakes become a great advantage when high speed, continuous, or repetitive hard braking comes into play.

If I were you I would take a good look at my pads, calipers, and rotors. My money is on one or more seized calipers and/or an issue with your brake master/booster.
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Old 08-02-2012, 08:09 AM   #17
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If the car is an automatic 9-3, the vacuum booster on the right end of the head might be failing. Bad braking is an early symptom of that.
3 Pedals and 5 speeds here. Can't rule out the master cylinder itself but the booster is good, holds vacuum for some time and can get a couple pumps before its rock hard.
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Old 08-02-2012, 08:11 AM   #18
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Don't just bleed. Do a full fluid exchange.
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Old 08-02-2012, 08:54 AM   #19
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Viggen/Aero 308mm front brakes & 9-5 Aero 300mm vented rears require at least 16" rims. You will also need a 16" spare. Worth wile upgrade.
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Old 08-02-2012, 09:13 AM   #20
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Have a full set of 17in OZ Racing rims. There's plenty of gap around the rotors LOL.
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