Is there only a rebuild kit available or is there a pump to just bolt on with a new front cover. Looking for a high volume.
Good points here in the thread.
I steer away from HV pumps and dont feel they are needed as well. In a nutshell the cam sensor turns the oil pump and the cam sensor is driven by the cam shaft.
What happens with a HV pump is the gears are longer and are going to take more to turn....that extra umpf needed to rotate the pump gears gets transferred up to the cam shaft and causes it to ride harder against the front cam bearing and is unneeded wear.
I will say that if you order a oil pump kit to check the gears close because the Melling kits dont have any packing to protect the gears hitting each other and one will typically be knicked up. In my current engine I couldnt get a clean set in one kit so I ordered a few before I could piece together a clean set.
IMO dont get wrapped in high oil psi at idle especially when its hot. As mentioned you have a regulator spring that you can put in and that changes MAX oil psi.
Changing the regulator spring has NOTHING to do with idle psi.
Very normal to have around 15ish psi on a fully heat soaked engine idling in gear with 10w40 and I have seen it there with 20w50. Now these numbers are with it HOT like after a beating, extended pull, idling in summer traffic, etc.
The norm "range" is 12-25 in gear heat soaked idling in gear IMO.
The oil psi should come up instantly as you break idle and as rpm increases. I like to see more than 10 psi per 1k rpm increase.