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Old 09-13-2007, 08:32 AM   #1
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996 TT Brake Calipers

Will the front 996 TT calipers fit on a 986 w/o any modifications?

Will installing the fronts only and leaving the small 986 brakes in the rear make the brakes all wack?

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Old 09-13-2007, 09:15 AM   #2
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Even if they do fit... think twice for two reasons: 1) bias will move forward... much more clamping power at the front with those turbo calipers, and 2) you may not like the increased pedal travel... your m/c will have to move more fluid to actuate those 8 piston binders, so travel will increase.
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Old 09-13-2007, 09:47 AM   #3
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Quote:
Originally Posted by Lucky
Even if they do fit... think twice for two reasons: 1) bias will move forward... much more clamping power at the front with those turbo calipers, and 2) you may not like the increased pedal travel... your m/c will have to move more fluid to actuate those 8 piston binders, so travel will increase.
Shouldn't the 996 TT calipers be a 4 piston design just like the 986 except larger?
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Old 09-13-2007, 10:06 AM   #4
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Quote:
Originally Posted by blinkwatt
Shouldn't the 996 TT calipers be a 4 piston design just like the 986 except larger?
Sorry, I made a typo. You are correct they are 4 pistons, but much larger diameter pistons (so more fluid needs to move for each unit of distance the piston extends).

One other thing to consider is rotor thickness. The turbo calipers are designed to work with turbo rotors, which are 32mm thick. Boxster front rotors are only 24mm (base) or 28mm (S). What rotors do you plan to run?
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Old 09-13-2007, 10:23 AM   #5
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Quote:
Originally Posted by Lucky
What rotors do you plan to run?
I'd use a set of 996 TT rotors of course.
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Old 09-13-2007, 02:32 PM   #6
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I believe wheel carriers are different. Not 100% sure, but I beleive that is why PCCBs would originally only work with turbos and C4s.

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Old 09-13-2007, 02:37 PM   #7
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Quote:
Originally Posted by 986rgt
I believe wheel carriers are different. Not 100% sure, but I beleive that is why PCCBs would originally only work with turbos and C4s.

Steve
Smart Man.

That's almost exactly what Instant G told me. It has to with the 4 wheel drive.
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Old 09-13-2007, 08:34 PM   #8
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They ARE NOT a direct swap... it would be dumb thing to do, b/c you are destroying your brake bias.

The 996TT brakes are 6 piston in the front... 4 in the rear.

You can do a GT3 brake conversion, but honestly with your standard 986, why would you need any more? You can just upgrade pads, lines, and fluid if you want increased performance... OR you can upgrade to 986S/ 996 brakes.
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Old 09-15-2007, 08:23 PM   #9
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Absolutely no point to do this unless you have somehow installed a 400HP motor in your Box.....

If anything, upgrade to S/996 brakes

Patrick

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