Debating Resurfacing Rotors vs Replacing

Brendan · 04-12-2019, 08:37 AM

Drilled and slotted don't really do much for performance. It used to help with off gassing during braking but modern composite pads no longer off gas. Even the most dedicated track guys will still run blanks. If the shop can cut the rotors, great. Otherwise new front rotors are not too expensive.

Rusty · 04-12-2019, 10:04 PM

You can cut drilled and slotted rotors. Just can't take a deep of a cut as on a blank rotor. To determine if cutting or replacing. Have to find out how much runout there is, and what the min thickness is. You do not want to cut under the min thickness. Most cases, taking off about .030" per side is the limit I would go if still above the min limit.

I have seen new rotors never put on a vehicle have runout beyond what is allowed.

04-12-2019, 08:37 AM	#1 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 646 Drives: Poor man's Porsche Rep Power: 544	Drilled and slotted don't really do much for performance. It used to help with off gassing during braking but modern composite pads no longer off gas. Even the most dedicated track guys will still run blanks. If the shop can cut the rotors, great. Otherwise new front rotors are not too expensive. Rusty and crothers like this.

04-12-2019, 10:04 PM	#2 (permalink)
Rusty A True Z Fanatic Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 70 Posts: 35,571 Drives: 2011 Nismo GM 6M Rep Power: 2684440	You can cut drilled and slotted rotors. Just can't take a deep of a cut as on a blank rotor. To determine if cutting or replacing. Have to find out how much runout there is, and what the min thickness is. You do not want to cut under the min thickness. Most cases, taking off about .030" per side is the limit I would go if still above the min limit. I have seen new rotors never put on a vehicle have runout beyond what is allowed. Brendan and Spooler like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

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