Anyone know of a place where I can get custom cast iron brake rotors done?
It would probably be easier to have hats machined for a standard rotor ring. What diameter are you looking for?
It is for a Formula SAE car. We are planning on running floating rotors. The hub pattern we are using is a 4x100mm. We are looking for a 10" diameter disc.
Or cut down an existing rotor around the correct size - I've seen a stock 1.6 Miata front rotor turned into a two-piece. 1994-00 Miata front rotors are 10" vented, rears are 10" solid. Either will cost you about $10 at NAPA.
Checkout the Wilwood catalog. You can mate a rotor diameter with a hat of almost any combo. I have also had excellent, patient response from calling them and asking ridiculous questions.
We used A2 tool steel for our rotors. We made Hats out of aluminum and machined the dogs out of regular mild steel. Just get them water jet or lazer cut.
There out there off the self. Peter D Motorsports in AZ has alum hub with floater disks. There are likley a few others too. Checked his site i can't find'em but i know i had a set on a dwarf cars rear axle a while back. You might be able to find some used ones on Dwarfcarracing.com as alot of clubs outlawed alum in any bake parts to hold cost down...
njansenv wrote: I'd consider looking for (used?) motorcycle rotors, and machining a hat. Nathan
that's what i was gonna say.
Check out www.Racingbrake.com They have custom fit rotor disks and hats.
Or check out their ad on page 108 of the April GRM.
The biggest problem is going to be finding an off-the-shelf rotor ring that's only 10". Most of them are 11" or larger.
That is problem I am coming across. I am going with cast iron because it provides the best thermal properties. Also the caliper we are going to be running takes a .38" thick rotor.
The year my team won the Continental Tevis brake system award, we made our own floating rotors. Ductile iron rotors in aluminum hats. Make your own.
We are planning on making our own aluminum hats. From everything I have read grey cast iron is preferable to ductile iron.
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