How to identify original rotors, and is there any reason to keep them?

Brake rotors?
Are they being replaced with OE rotors or oversized, drilled, slotted, cryogenically preserved space shuttle brakes?
If the former I can't see why anyone would care.

 

I got the shuttle brakes on mine... stops on a dime but the damn thing is rough on re-entry

 

The original rotors were quite thick, and can be turned on a brake lathe, as long as they are within wear limits, and be reused at lelast once. Many F cars have low mileage, and are not necessarily driven hard. My 1988 Mondial 3.2 has the original rotors at 80,000km, and they have plenty of thickness left.

I think the original ATE brake pads, that do leave behind alot of dust, are very easy on the rotors.

 

The rule of classic Ferrari ownership is never throw away an old original part!

 

The oem rotors are vented. I was able to turn my rear rotors. Fronts were too thin.

For weight savings you probably want to try and find a two-piece rotor with an aluminum "hat" those are always lighter.

I didn't on mine because I wanted it to be original, but it's not a bad idea since these cars aren't exactly powerhouses.

 

All 328s had vented rotors front and rear. If you mean drilled rotors the weight difference is meaningless its so slight.

Working on 328s since new and owning one for 15 or so years I have never once encountered a rotor so worn it could not be resurfaced and still be well within minimum thickness.


Girodisc makes some slotted floating rotors with aluminum hats that are lighter but as I recall only for the front. I have a set and have never installed them.

 

Their rotor life has a great deal more to do with the quality of iron used. The Germans are famous for using butter soft material that wears away like a pencil eraser.

 

Of course, finding someone who can actually turn a rotor is becoming harder. The addiction to low cost throwaway products has sunsetted many small business skills involving refurbishment in favour of replacement.

I have a set of Brembo replacement brake discs bought years ago, and have been surprised that I have not needed to replace the originals, and perhaps with a turn of the original discs, maybe never will.

 

If you are in the US O'Reilly Autoparts will turn them for you

 

And that is why they do not last very long.

 

Almost no repair shops have brake lathes anymore. Shops need to send them out to be resurfaced and the turn around time is so long a rack is tied up with no work being done. Its why I bought my own brake lathe. I cannot remember the last time I bought a new rotor. Ferrari rotors are very good quality and if someone is using the brake lathe correctly Ferrari rotors should be a near lifetime part on a street car.

 

If you had to buy rotors for a 308 QV who would you go to today?

 

i cant imagine not buying OEM. Any aftermarket is almost certainly Indian or Chinese.

 

these rotors came off a mondial with >100,000 miles - as you'll see, I measured each one and compared it to the brembo spec (which was like 18mm min or so) - there was plenty of use left in all of them, so they got cleaned up and the non machined surfaces got the cast iron powder coat to get them looking fresh again.

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Not surprised at all.

 

I've gtahered up an extra set of OEM rotors but never had to use them.

If you are discarding the, I'll add them to my stack.
There's still shops around that can "turn" them without dmage but it won't be a young man on the lathe!!

 

The originals have the stamping on hub barrel of wear detail numbers for your measurement.
If still good you can turn them but new ones are $400 USD about

 

Those came out great.