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Posted by: stateofidleness May 30 2022, 12:59 PM

While taking wheels off to get new tires put on to hopefully be able to get it to a restoration shop, wanted to get some experienced eyes on my rotor situation. Are these any good?




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Posted by: Superhawk996 May 30 2022, 02:02 PM

Short easy answer - yes buy new rotors.

Hard to tell from photo but if there is any grooving (looks like it to me), you will want new rotors. Potentially can be turned on brake lathe if they aren't at minimum thickness.

Two problems with that:

1) Cost to turn them may be very close to cost to replace them. Depends on your local economics.

2) As rotors get turned, they get thinner, and therefore more prone to developing brake disc thickness variation, and/or warping in the future depending on your driving style and the type of pads that are used.

If you're broke and just trying to get by, drive them some and see how much they clean up on their own. Light rust in and of itself is not a problem. It will clean off after some driving.

Posted by: stateofidleness May 30 2022, 02:32 PM

Ok cool. I'll plan to replace. So dumb question... are "new" ones available, or is it only used ones and hoping to find a good set?

Posted by: stateofidleness May 30 2022, 02:32 PM

Oops.. sorry for double post. Not sure how to delete a reply.

Posted by: scallyk9 May 30 2022, 02:37 PM

New ones are available. I had been advised to get "frozen rotors" by a mechanic who prepares vintage race cars and bought a set from a company called Cryogenics something or other...just do a search for Frozen Rotors. I had them groove them for a small extra charge. They have been excellent for the street and track days.

Posted by: Superhawk996 May 30 2022, 02:58 PM

Save your money - you don’t need cryogenic rotors or slotted rotors

PMB has what you need. Support the vendors that support the 914 community. PMB = good folks.

https://m.pmbperformance.com/catalog/item/1925563/4747407.htm

Posted by: stateofidleness May 30 2022, 07:19 PM

QUOTE(Superhawk996 @ May 30 2022, 03:58 PM)

Posted by: bbrock May 30 2022, 08:14 PM

I replaced my rear rotors with SEBRO from PMB but had my fronts turned at my FLAPS. The fronts had shallow grooves. Having them turned saved quite a bit of money. I think it only cost like 12 bucks for the pair. Maybe more but it was less than half the price of buying new. Turns out there is a lot of extra meat on the original rotors so I didn't come close to the wear limit. I just pulled wheels off yesterday to inspect after 3K miles running the rotors and they look great. I've cooked the out of them too but no signs of warping so far.