oil pumps,,high pressure,high volume,both?

1wild, I'm pretty sure oil pump output has a range... With the right spring, or shim, or **** in the bypass valve, a stock pump will reach 65psi in a otherwise healthy engine. I've never seen one go higher hot, but I certainly don't build thousands of them. I'm also curious why if you modify the passages that you'd need a bigger volume pump?

Pro - the HV pump already has the higher pressure spring. You can also by the stock volume pump with the spring in it... Look for the "HP" suffix instead of the "HV". It's good practice to disassemble any new oil pump before you use it to make sure it's free of debris so I just use the MP kit and a stock pump and replace it myself. Price wise it's close to the same $$. You could pull the cap and shim any pump to get a higher bypass pressure but that won't really help with the HV unit until you change the pickup design to allow more oil to the suction side of the pump.