Is this rotor usable?

[RETed]

Small cavaet when using FD rotors in an FC 13BT engine...

The FD rotor bearings are different.
I dunno if it's a big deal to you, but the FD rotor bearing groove is deeper than the Kouki FC 13BT rotor bearings.
Also, I think Mazda has like a bazillion different rotor bearing sizes / part numbers for the FD rotor bearing.
The FC3S 13BT rotor bearing only has two - "normal" and "oversized".

Although this should not matter too much for a street motor, but if you're going for big power and or spin over stock redline, this miniscule fact might come into play.

Glad to hear the seller is willing to take care of the problem without much fuss...


-Ted

[JustJeff]

Originally Posted by RETed

Small cavaet when using FD rotors in an FC 13BT engine...

The FD rotor bearings are different.
I dunno if it's a big deal to you, but the FD rotor bearing groove is deeper than the Kouki FC 13BT rotor bearings.
Also, I think Mazda has like a bazillion different rotor bearing sizes / part numbers for the FD rotor bearing.
The FC3S 13BT rotor bearing only has two - "normal" and "oversized".

Although this should not matter too much for a street motor, but if you're going for big power and or spin over stock redline, this miniscule fact might come into play.

Glad to hear the seller is willing to take care of the problem without much fuss...


-Ted

Thanks Ted, I did not know the bearings were different between the rotors. Though it won't be used for a high HP or RPM engine.

I'm curious on how that damage and gap will effect the actual apex seal. I hadn't considered that it would create compression issues. I had assumed it would effect the apex seals longevity/lifespan. My assumption was that the gap would cause the seal to bend and break...essentially cracking the new seal where the old one detonated. I'd have to think it would be more prone to breaking under detonation on that same spot?