I don't think it's so much of an issue with the relief valve.

More so the material the gears are made out of.

When bouncing off the rev limiter the gears are being loaded and unloaded so quickly they shatter.

Atomic say they "revise the relief circuitry".......bigger relief valve?

Yes, the relief is larger in the Atomic pumps, this is to cope with rpm north of 6000 and also higher pressure created by cold oil.

Atomic say they "revise the relief circuitry".......bigger relief valve?

To me the problems I have seen with pump failures are when the throttle limiter is removed and the fuel cut is used only to control the revs. But these where massively abused cars.

The reason for the reileif valve mod from what I've heard is due to "The cam phasors not working properly over 6250rpm due to oil control". Now I'm not sure where this came from but I know for a fact that the cams will turn off electrically above this rpm meaning the cams will go from 20degrees retard to -10degree advance.