Turning comp pack rotors?

[SteelGreyM]

Pretty sure I know the answer here but what’s the general consensus on turning comp pack drilled rotors?

Was about to do it but remembered how they’re prone to cracking and decided to replace them

Anyone done it with good results?

What’s the discard?

[Slideways]

Rotors have a minimum thickness stamped on them and turning them can get them really close to that minimum amount. That being said, I have seen track cars with heavily lipped and micro cracked rotors that must be at or well passed the minimum thickness.

Also, most shops won't turn drilled or slotted rotors cause it will wear out their cutting bits.

SHW sells pretty affordable ZCP rotors.

[SteelGreyM]

Rotors have a minimum thickness stamped on them and turning them can get them really close to that minimum amount. That being said, I have seen track cars with heavily lipped and micro cracked rotors that must be at or well passed the minimum thickness.

Also, most shops won't turn drilled or slotted rotors cause it will wear out their cutting bits.

SHW sells pretty affordable ZCP rotors.

Yeah I am buying new oem comp pack from FCP. Paid $1000 last time and just now paid $1800 so it would be $800 for the rotors. Which relatively speaking ain't bad but if I can double the life of them for $100 and just get them turned at oreillys why not.

[D-O]

I talked a friend in our service department into doing it for me. As Slide said, it is hard on the cutting bits, and it requires very shallow passes. It was tedious and time consuming, but it turned out just fine. We would certainly not agree to do it for a customer.

So yes, it can be done with good results if you have enough material left on the rotors, but I suspect it will be tough to find someone who will agree to do it for you.

D-O

[Estoril]

Lacking any cracks, measure the rotor thickness to the spec stamped on the rim. The minimum thickness reached means replace.

[1000hp]

I talked a friend in our service department into doing it for me. As Slide said, it is hard on the cutting bits, and it requires very shallow passes. It was tedious and time consuming, but it turned out just fine. We would certainly not agree to do it for a customer.

So yes, it can be done with good results if you have enough material left on the rotors, but I suspect it will be tough to find someone who will agree to do it for you.

D-O

If you pay the tech accordingly they probably won't mind. I wouldn't expect them to do it for whatever it normally pays to turn rotors, but you could pay generously and still save a lot of money vs replacing them for $800.

[bigjae46]

Find a tech that hates their shop...he'll gladly ruin some cutting bits to turn your rotors. And not hard to find pissed off techs, just make sure they aren't pissed off at you...lol

A better way to get them machined is to find a machine shop that does rotors. No idea what it costs.

You have to consider the flatness of the inner hat. Probably not as much of an issue with a floating rotor but the inner hat can distort from heat cycling which would cause issues when the rotor is machined while on the car.

Why do you need to turn the rotor? Just pad slap.

[x Spades x]

Im about to get this done at O'Reilly today. Ill report back... but $25 per rotor... and they confirm they will do drilled zcp rotors as long as it meets the minimum thichness