Ls2 408 stroker
Yes a higher volume pump would help - think VVT and DOD engines...highest volume and pressure OEM pump. The cam phasers and DOD lifters are very oil hungry.
But I don’t think you’ll have an issue unless pressure drops very low when the oil gets hot, or is unstable under load. Reliable oil pressure is more important than overall pressure once above ~50psi...anything more isn’t really useful.
But I don’t think you’ll have an issue unless pressure drops very low when the oil gets hot, or is unstable under load. Reliable oil pressure is more important than overall pressure once above ~50psi...anything more isn’t really useful.
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Yes. As I said earlier, I saw a pressure drop with the axle oiling on hydraulic set ups also. Once I hit cruising at 1200 rpm, it was up near 40. Once the pump gets some RPM it's fine. I truly do not think you will have an issue. As they tune it in, keep an eye on the pressure.
I think you are fine.
I think you are fine.
I certainly don't want to have oiling issues and blow the engine.
They would need to put me in the nuthouse if that was to happen.
Just don't go rip a 7500 rpm pull until you know what the pump is doing. At some point, it will stall out. The pump can only pump so much, and the relief spring will open, so you'll be at 70 or so PSI near the top of the RPM range.
Now, if you run 1200-1500 rpm, and it's not coming up, then stop right then and address the pump. But I would be running along cruising with oil pressure in the 38-50 range, and as soon as I came to a stop, it dropped to mid 20's. It ran like that until I pulled it apart for the new motor.
If you're nervous, well a high pressure pump is relatively cheap. Plus the cost of getting the front cover off to install it.
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From: Coast of San Mateo County Between Pacifica & HMB
As stated: as long as you have at least 15, preferably 20 psi @ hot idle, AND 7 PSI per 1000 RPM
rising with wot so 50 PSI @ 7000 AND using a quality synthetic at correct viscosity, & temp,
you are good!
rising with wot so 50 PSI @ 7000 AND using a quality synthetic at correct viscosity, & temp,
you are good!
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From: VA
My car when oil temps reach 235-240 will see around 16-18 at hot idle after 3 passes back to back. Still gets to 65 at close to 8000
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i have no idea a high pressure pump even exists?
There are no results.
Engine was put together and is running fine.
Only the oil pressure is too low and engine needs a tune.
I also have to replace the damn alternator too.
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From: HTown, Texas
The "high volume" pumps will actually do more for idle oil pressure than the "high pressure" pumps will. I've seen guys with less than 20psi oil pressure at hot idle and last for years of abuse. Cut open and inspect the oil filter for the first few oil changes and if it's clean, then you have nothing to worry about.
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The "high volume" pumps will actually do more for idle oil pressure than the "high pressure" pumps will. I've seen guys with less than 20psi oil pressure at hot idle and last for years of abuse. Cut open and inspect the oil filter for the first few oil changes and if it's clean, then you have nothing to worry about.
Is there a reason why the oil pressure would lose that much psi?
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From: HTown, Texas
It's really nothing to worry about because it's not the pressure you see on your gauge that is important, especially with solid lifters. The main and rod bearings are designed to create their own pressure to keep the crank journal separated from the bearing itself aka hydrodynamic wedge. Increasing the pump volume to get the pressure up is probably just going to cause more oil to get tossed around in the bottom end and create more windage.
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I thought that was already answered. The axle oiling in the lifters is going to certainly drop the pressure.
It's really nothing to worry about because it's not the pressure you see on your gauge that is important, especially with solid lifters. The main and rod bearings are designed to create their own pressure to keep the crank journal separated from the bearing itself aka hydrodynamic wedge. Increasing the pump volume to get the pressure up is probably just going to cause more oil to get tossed around in the bottom end and create more windage.
It's really nothing to worry about because it's not the pressure you see on your gauge that is important, especially with solid lifters. The main and rod bearings are designed to create their own pressure to keep the crank journal separated from the bearing itself aka hydrodynamic wedge. Increasing the pump volume to get the pressure up is probably just going to cause more oil to get tossed around in the bottom end and create more windage.
The only person who said something different to everyone in here is Howards cams.
Here is what they said
irect oiling to the axle will have no effect on oil pressure.We have had no oiling issues with those lifters & have verified with Morel incase they had any other customers with an issue.
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I thought that was already answered. The axle oiling in the lifters is going to certainly drop the pressure.
It's really nothing to worry about because it's not the pressure you see on your gauge that is important, especially with solid lifters. The main and rod bearings are designed to create their own pressure to keep the crank journal separated from the bearing itself aka hydrodynamic wedge. Increasing the pump volume to get the pressure up is probably just going to cause more oil to get tossed around in the bottom end and create more windage.
It's really nothing to worry about because it's not the pressure you see on your gauge that is important, especially with solid lifters. The main and rod bearings are designed to create their own pressure to keep the crank journal separated from the bearing itself aka hydrodynamic wedge. Increasing the pump volume to get the pressure up is probably just going to cause more oil to get tossed around in the bottom end and create more windage.
Bortous you said it's down 15psi across the board, not just idle. So it must be sitting around 50psi at 7k rpm? I hope for your sake it's fine as is and the psi loss is of no detriment to the bottom end. The high volume pump you have should help keep bearings alive even though your pressure is now lower.
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