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Go Back   IWSTI.com: Subaru WRX STI Forums > GD Series STi Discussion (2003/4-2007) > GD-Technical > GD-Braking


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Old 01-31-2007, 09:09 AM   #1
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Default Big brake kits that fit stock wheels???

I am trying to find a big brake kit, not just after market rotors, that wil fit the stock wheels. Anyone accomplished this?


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Old 01-31-2007, 09:35 AM   #2
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Why do you want a BBK? Upgrading the pads, lines, fluid, and rotors on the stock calipers is enough to make tires the limiting factor.
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Old 01-31-2007, 09:50 AM   #3
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Quote:
Originally Posted by BoostJunkie
Why do you want a BBK? Upgrading the pads, lines, fluid, and rotors on the stock calipers is enough to make tires the limiting factor.
I am currently running Pagid yellows, SS lines, ATE fluid but I want more. I plan on moving up to 18's but want keep the stockers for the track and use slicks in a wider diameter.
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Old 01-31-2007, 10:41 AM   #4
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Have you tracked on R-comps or DOT slicks with that setup? I am running the same pads and I can trigger ABS easily (although I try to avoid it) with street tires. Stickier tires would make a huge difference.
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Old 01-31-2007, 10:52 AM   #5
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Quote:
Originally Posted by BoostJunkie
Have you tracked on R-comps or DOT slicks with that setup? I am running the same pads and I can trigger ABS easily (although I try to avoid it) with street tires. Stickier tires would make a huge difference.
Yeah the ABS does trigger pretty easily. Do tires make that big of a difference braking?
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Old 01-31-2007, 10:53 AM   #6
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StopTech 332x32mm kit fit stock wheels..you will probably have to relocate your wheel weights to the inside of the wheel

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Old 01-31-2007, 10:59 AM   #7
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Quote:
Originally Posted by crand002
Yeah the ABS does trigger pretty easily. Do tires make that big of a difference braking?
Absolutely. The brakes slow down the wheel's rotation but the tires are what create the friction with the road. You could have the best brakes on earth but if they overpower the tires they are useless. A BBK might give you slightly better pedal feel but will not reduce stopping distances nearly as much as good tires. IMO the main benefit of a BBK is that they come with 2-piece rotors with better ventilation so they resist fade a lot better than stock. Go for a 2-piece rotor like the performance frictions and a master cylinder brace to help with pedal feel. That's what I have and I can't imagine needing anything better. Oh, and whatever you do don't drive a Porsche 997 Our brakes will NEVER feel that good.
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Old 01-31-2007, 11:00 AM   #8
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Oh, and don't forget brake ducts like the RCE kool brake kit. They make a huge difference in fade resistance.
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Old 01-31-2007, 11:11 AM   #9
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Great info thanks. My dad has 14 inchers all the way around on his Viper and the thing gives me a major dizzy spell when I hit them hard. My set-up doesn't feel anything like that.

What 17" tires would you recommend me getting for the track?

thanks again
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Old 01-31-2007, 11:20 AM   #10
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Quote:
Originally Posted by crand002
Great info thanks. My dad has 14 inchers all the way around on his Viper and the thing gives me a major dizzy spell when I hit them hard. My set-up doesn't feel anything like that.

What 17" tires would you recommend me getting for the track?

thanks again

Dan is right, you should not need any bigger brakes. What exactly is it that you want? you say "more" but if your brakes can trigger ABS, and dont over heat, bigger brakes are not actually going to stop you any faster. Tires will help, and then the weight of the car.

So may people have no idea how brakes work. If you are not fading, and can hit ABS then you dont need bigger brakes

Try the RCE cooling ducts and some R-comps or hoosiers, but i really hope you have a suspension setup to accommodate them.

How much camber are you running?
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Old 01-31-2007, 11:28 AM   #11
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While its true that the tires stop the car, it still may be possible to reduce stopping distnces with a BBK while on the same tires. The STi is front biased to a degree from the factory which means it is not utilizing the rear tires under braking as effectively as it could be. Using a kit that reduces front torque output to a degree can improve braking distances by shifting bias rearward taking advantage of the tractive capcity of the rear tires for better braking perofmrnace. This can also be acheived to a degree by getting creative with pad compounds but will not be as effective as adjusting piston sizes speicfically to an application. The reduced piston sizes also help to improve pedal feel and responsiveness.

Erik - StopTech
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Old 01-31-2007, 11:29 AM   #12
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Quote:
Originally Posted by spazegun2213
Dan is right, you should not need any bigger brakes. What exactly is it that you want? you say "more" but if your brakes can trigger ABS, and dont over heat, bigger brakes are not actually going to stop you any faster. Tires will help, and then the weight of the car.

So may people have no idea how brakes work. If you are not fading, and can hit ABS then you dont need bigger brakes

Try the RCE cooling ducts and some R-comps or hoosiers, but i really hope you have a suspension setup to accommodate them.

How much camber are you running?
I am running -2.6 in the front and -1.6 in the rear. I have never tracked the car with R-compounds so I am learning. Will that work with R's or Hoosiers? If so, what size do you recommend?
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Old 01-31-2007, 11:31 AM   #13
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Thanks for that post Erik.
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Old 01-31-2007, 11:37 AM   #14
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Quote:
Originally Posted by crand002
I am running -2.6 in the front and -1.6 in the rear. I have never tracked the car with R-compounds so I am learning. Will that work with R's or Hoosiers? If so, what size do you recommend?
How much track experience do you have? If you think you are ready to move beyond street tires, go for something like RA-1's or NT01's.
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Old 01-31-2007, 11:40 AM   #15
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Quote:
Originally Posted by crand002
I am running -2.6 in the front and -1.6 in the rear. I have never tracked the car with R-compounds so I am learning. Will that work with R's or Hoosiers? If so, what size do you recommend?

Try RA-1's on NT-01's if you think tires are your limiting factor. How many events have you done? and also can you explain what you mean by "more". Sorry to pry, but on RA-1's, blues, SS lines, fresh ATE, i can hang with elises in the braking zones. Its all about compressing the braking zones and using every bit of performance the OE calipers have (which is a TON).

you just have to know, and I've been wrong before. doing 140 and starting to brake at the 250 feet mark... i went two off

As for your setup, looks good for R-comps, you want more camber for hoosiers though (I would suspect) I would say 235-45, or the nt-01 in 245-45 (if you are not to low).


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