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Old 10-16-2019, 03:49 PM   #295
949 Racing
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James,

Definitely would have been better start a new thread. No one's going to go into this thread to look for tt5 optimization information.

That said, ducting and careful brake management is probably going to be your best strategy. You're breaking g's are limited by traction not anything in the brake system itself.
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Old 10-16-2019, 03:54 PM   #296
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My hypothesis was that bigger disks/pads *could* increase my G force under braking, which will translate into lower lap times, but I don't have data to prove or disprove it.
I'll let 949 comment more on this, but this general isn't the case. The technical reason for a big brake kit is to increase the useful mass in order to aid in thermal management. There's many other benefits (like 949 mentioned) like decreasing sprung weight, and decreasing consumable cost with 2 piece rotors etc.

But from a physics standpoint, increasing rotor/pad size with all else being equal doesn't necessarily increase total braking torque.
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Old 10-16-2019, 06:11 PM   #297
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My hypothesis was that bigger disks/pads *could* increase my G force under braking, which will translate into lower lap times, but I don't have data to prove or disprove it.
If you can lock up the tires (engage ABS) with your current brakes then the limit of your braking ability is not the brakes it is the tires.
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Old 10-16-2019, 09:26 PM   #298
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86 Drive Challenge TT at Sonoma this weekend. Sonny and Ed will be there in Blub. Got the Xida protos on finally. Still refining valving spec but we're close I think. Evaluating the new Nankang AR-1 in 255/40R17 against the R888R if we can get some clean laps and steady temps/sunshine.

If you will be there, Sonny will start giving rides probably 3rd session. First two sessions are solo, go time for the TT and dialing in the setup.


Yes, as mentioned a few times above
That photo shows a good amount of droop in front, comparable to stock I'd say. What ride height would this be adjusted for compared to stock?
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Old 10-16-2019, 10:05 PM   #299
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That photo shows a good amount of droop in front, comparable to stock I'd say. What ride height would this be adjusted for compared to stock?
We have been running about 140mm front pinch weld height with 5mm positive rake on 255/40/17. Pinch weld height changes a bit with taller than OEM tires.
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