[davepl]

A high volume pump shouldn't cause problems, though a high-psi pump can. A high volume pump just has larger rotors that have the ABILITY to push more oil but since the relief valve and spring are the same, it will NOT flood the upper engine as a result.

If you have a high PSI pump though it can, at least that's been my experience.

Some people restrict oil flow to the upper gallery, though that's almost always on roller cams and I wouldn't monkey with it on a flat tappet motor.

My bet is you've actually got a higher PSI spring in that oil pump and the high volume part is unrelated.