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Front Rotor Thickness Options


Scott
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Curious what people are having good experiences with.  I'm looking at either a 1.1" or 1.25" rotor.  Car weight will likely be in the 2500-2700 range.  Looking at tracks like Road America.

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4 hours ago, Scott said:

Curious what people are having good experiences with.  I'm looking at either a 1.1" or 1.25" rotor.  Car weight will likely be in the 2500-2700 range.  Looking at tracks like Road America.

If you have an option bigger wider more material is always better, rotors will last longer as well as brake pads that way, the rotors job is to disapate heat created while braking. 

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Road America is really hard on brakes in any car. With that weight get all you can and find pad compound that will last. Cooling or ducts are also important.

We run 11" up front with a veined rotor in the 1" thickness range in our Miata. We run ST43 and get 30hours or more.

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23 hours ago, Scott said:

Curious what people are having good experiences with.  I'm looking at either a 1.1" or 1.25" rotor.  Car weight will likely be in the 2500-2700 range.  Looking at tracks like Road America.

"75 280Z J30 Honda swap, 2250 lbs.

front 11"x 7/8" Sentra SE-R rotor, RX7 4 piston alum caliper, Hawk Blue pads

rear 11" x 5/8" Sentra SE-R rotor (cut down), Z32 2 piston alum caliper, generic ceramic pads

3" brake ducting

the brake ducting is important, with optimized ducting you can reduce rotor size and thus rotating and unsprung weight. A key item is the duct at the rotor, it should seal on the rotor and direct air to the central vanes, either at the inside or outside edge. Just pointing the duct at the inside face of the rotor is going to mean uneven cooling.

You can also lighten a rotor by cutting the inside face inside edge outward to the edge of the brake pad, most rotors have extra material here. Also the lug hole face can have additional holes drilled. These lightening methods reduce rotor weight which does reduce cooling capacity.

Another option is cyrogenic (frozen) rotor treatment which increases heat durability.

duct.jpg

3duct.jpg

Edited by Dimsun Racing
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