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Tristahn · 10-02-2017, 11:27 PM

Notilloc thanks for your reply. Having done some additional reading here's what I think I'm learning:

The stock Brembo pads have "roller skates" which act as harmonic balancers. They stick out an extra inch and prevent the mounting of 18's in some cases. I (and I assume you as well) are running a set of track brake pads and have removed those things. Which now should allow 18's to mount fine.

10.5 is the key width to avoid the need for spacers. This is cool because 305's require a 10-12 inch rim and so it's right in the ballpark. If I go 11 I then need a spacer to clear the strut. That then leads to extended thread wheel lug nuts or potentially even swapping wheel studs out of the spindles for longer ones.

The smaller diameter tire will result in less rotating mass and potentially faster acceleration. It will also run me through the gears faster but on a road course I'll never run out of gears. Speedo will be inaccurate but who cares.

Your point about hot brakes is an important one. I'm running drilled and slotted Baer rotors, braided lines, Motul RBF 600 DOT-4 fluid and Carbotech pads that squeal like a pig. Short of venting the system, so far so good at the track. Oil temps have been the main issue I've been dealing with and so I just finished a big oil cooler project which this weekend I'll see how well it works.

10-02-2017, 11:27 PM	#4
Tristahn 2011 2SS LS3 Auto Drives: 2011 Camaro SS Join Date: Feb 2015 Location: Phoenix, AZ Posts: 63	Notilloc thanks for your reply. Having done some additional reading here's what I think I'm learning: The stock Brembo pads have "roller skates" which act as harmonic balancers. They stick out an extra inch and prevent the mounting of 18's in some cases. I (and I assume you as well) are running a set of track brake pads and have removed those things. Which now should allow 18's to mount fine. 10.5 is the key width to avoid the need for spacers. This is cool because 305's require a 10-12 inch rim and so it's right in the ballpark. If I go 11 I then need a spacer to clear the strut. That then leads to extended thread wheel lug nuts or potentially even swapping wheel studs out of the spindles for longer ones. The smaller diameter tire will result in less rotating mass and potentially faster acceleration. It will also run me through the gears faster but on a road course I'll never run out of gears. Speedo will be inaccurate but who cares. Your point about hot brakes is an important one. I'm running drilled and slotted Baer rotors, braided lines, Motul RBF 600 DOT-4 fluid and Carbotech pads that squeal like a pig. Short of venting the system, so far so good at the track. Oil temps have been the main issue I've been dealing with and so I just finished a big oil cooler project which this weekend I'll see how well it works. __________________ 2011 2SS LS3 Auto Blue Camaro Rotofab CAI, Magnuson TVS 2300 & OD cog, L99> now LS3 with custom cam, 1000 cc injectors for E85, flexfuel & secondary fuel pump, ZL1 tank fuel pump, ADM FPCM, Kooks LT headers with high-flow cats, Magnaflow 3" exhaust, catch can, Alkycontrol methanol system, Z28 wheels with Nitto NT05 tires, BMR cradle bushings, sway bars, trailing arms, adjustable toe rods, end links, lower control arms, and 1.25 drop springs, Aero force gauge, wideband sensor gauge in two-hole pillar pod. E85 - 675 HP/643 Tq & 91 - 604 HP/579 Tq, 10.6s ET on MT slicks at 132 mph.