What options are there for increased flow oil pumps?
The setup:
-turbo
-machined crank (10 over on all)
-balance shaft rear oil feed is plugged and drive gear removed for the double roller, balance shaft/bearings left in the block
-oil restricted push rods
-LS lifters
-cam bearings replaced with new, machine shop matched to the cam
-clevite 77 main and rod bearings
-oil filter relocation kit, using an oversized oil filter
-10w30 synthetic oil
-oil volume kit already installed
-oil pressure is being measured at the block main feed (so after all the extra plumbing for the oil filter relocation)
I have a unique oil system setup, I added an electric oil pump because I didn't like the oil pressure I was getting at idle fully heat soaked. This is on a secondary circuit. It has a low pressure check valve that feeds into the primary circuit if the primary circuit pressure falls below the secondary. That valve is before the oil filter so no un-filtered oil gets sent to the block. The secondary circuit currently has a 5 micron bypass filter and a pressure regulator to limit it to 40psi, excess bleeds off back to the oil pan. The secondary system adds 2 quarts to the system capacity between the filter and hoses
The primary circuit drops off to about 10psi at idle. I've seen this on a few other rebuilt 3800's, I'm guessing that's the reason why people don't like rebuilding them. When I plasti-gauged the bearings at rebuild they were within spec. With the secondary circuit on I get 20-30psi at idle, but there's no good reason that the oil pump in the engine can't keep up with idle pressure. But short of getting some sort of video camera inside the engine I have no way of knowing if one of the mains is just gushing out oil or what.
Thoughts? Add a large oil cooler between the filter and the block? Is there an increased capacity pump anywhere? Use 10w40 turbo diesel oil?
The setup:
-turbo
-machined crank (10 over on all)
-balance shaft rear oil feed is plugged and drive gear removed for the double roller, balance shaft/bearings left in the block
-oil restricted push rods
-LS lifters
-cam bearings replaced with new, machine shop matched to the cam
-clevite 77 main and rod bearings
-oil filter relocation kit, using an oversized oil filter
-10w30 synthetic oil
-oil volume kit already installed
-oil pressure is being measured at the block main feed (so after all the extra plumbing for the oil filter relocation)
I have a unique oil system setup, I added an electric oil pump because I didn't like the oil pressure I was getting at idle fully heat soaked. This is on a secondary circuit. It has a low pressure check valve that feeds into the primary circuit if the primary circuit pressure falls below the secondary. That valve is before the oil filter so no un-filtered oil gets sent to the block. The secondary circuit currently has a 5 micron bypass filter and a pressure regulator to limit it to 40psi, excess bleeds off back to the oil pan. The secondary system adds 2 quarts to the system capacity between the filter and hoses
The primary circuit drops off to about 10psi at idle. I've seen this on a few other rebuilt 3800's, I'm guessing that's the reason why people don't like rebuilding them. When I plasti-gauged the bearings at rebuild they were within spec. With the secondary circuit on I get 20-30psi at idle, but there's no good reason that the oil pump in the engine can't keep up with idle pressure. But short of getting some sort of video camera inside the engine I have no way of knowing if one of the mains is just gushing out oil or what.
Thoughts? Add a large oil cooler between the filter and the block? Is there an increased capacity pump anywhere? Use 10w40 turbo diesel oil?