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02-01-2024, 09:37 AM | #1 |
First Lieutenant
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Track Day (none competitive) Rotor Options (Iron) solid disc?
As title, besides the drilled options from FCP Euro (and the lifetime warranty) is there any cheap solid disc options for our cars?
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02-01-2024, 09:59 AM | #2 |
///M Powered for Life
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I would never run solid iron rotors on something this heavy. They will fry the bearings even faster than the OEM setup, that has pins to separate the rotor from the hat.
I believe there are cheap rotors out there that are one-piece, but they do not belong on track |
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02-01-2024, 10:48 AM | #3 |
Major General
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If you plan on sticking with the oem brake setup, why not invest in a two-piece rotor setup thru FCPeuro? After two rotor replacement you’ve invested basically the same amount as two stock rotor replacements. As SYT_shaddow said, don’t run cheap (cost and material) solid face rotors on the track. If it’s a DD and you need brakes to get you to work and back, I can see the argument for running cheap rotors (I personally never would on a car with > 400 hp/torque stock) but never for track. The brakes are the most valuable safety systems you have on the race track. Don’t mess with it.
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02-01-2024, 10:58 AM | #4 | |
First Lieutenant
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Quote:
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02-01-2024, 11:37 AM | #5 | |
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If you’re worried about cross drilled rotors (which btw there are two types - cast in vs actual drilled, BMW holes are cast in), you need to closely inspect them before and after track sessions AND bring at a minimum a new set of spare front rotors. Cracks grow slowly from the thru holes and take a long time before they reach a free edge. I used to use up the rotor thickness before having a crack grow to an edge. If you’re going thru rotors with five days on track then you need either a new brake setup or a maximized oem setup. Personally, I’d go with an Essex/AP Racing or BW/Alcon F & R brake kit. StopTech and Paragon (their own caliper or a Alcon mono6/mono4 caliper) kits are a little easier on the budget. You do get what you pay for when it comes to braking systems. BTW, I’d stay away from StopTech until they address their stocking/distribution issues. If you stick with the stock setup go with 2-piece slotted/j-hook rotors, air deflectors, steel domed pistons, etc. plus track pads that are easier on the brake rotor (e.g., PFC 11, Cobalt XR1/XR2, CT XP12/XP20). But please do not run cheap rotors, especially cheap materials, because they can fracture just like drilled rotors. |
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02-01-2024, 12:16 PM | #6 |
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it sounds like you have a brake performance issue, but the solution is to go in the opposite direction and get better hardware
Girodisc rotors are expensive, but worth every penny with massively increased durability. That, air deflectors (BW sells a good kit), good pads and potentially some domed pistons etc for your calipers make a big difference You will see some E36/E46 racecars running 'blanks' as rotors, but those cars weigh very little and have engines that are massively less capable than the S55. You can do it with a light car and little power, but not on a F M3/4 |
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