High volume oil pump & oil pressure gauge reading

[65 fastback]

The engine builder put a high volumn oil pump in my new engine. I finally got it running and it pegged (and stuck the needle) on my oil pressure gauge. My old engine used to run at 50 psi. What PSI should I expect from the new high volumn pump?

Tim

 

[D.Hearne]

Depends on how tight the clearances are in the engine. 70-80 psi,(or more) cold at idle with 20W-50. Both my engines (roller 302 and a roller 331) have 40-50 psi cold with std pumps.

 

[rbohm]

ask your engine builder why on earth did he install a high volume pump on a new engine. it will only cause you problems down the road.

 

[spirockp]

A high Volume pump will not cause high pressure. It just flows more oil at the same stock pressure.

 

[D.Hearne]

A high Volume pump will not cause high pressure. It just flows more oil at the same stock pressure.

Does too. This is also dependent on the relief valve setting

 

[Rapid]

My High Volume oil pump on a fresh re-build runs about 50 psi running and 25-30 at idle.

I took out a High Pressure that was 75 psi running and 40 at idle.