Any downside to high pressure oil pump.
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Any downside to high pressure oil pump. Hi all,
Ly6 build, Cletus bald eagle cam, long tubes, intake. Goal off 500hp crank +/- and keeping rpm limit at 6500. Street car that won’t see track time but will get driven with gusto quite a bit. I was originally going with a new gm oil pump but have since added a remote oil filter and accusump to the plan increasing oil volume in the system. Possibly an oil cooler in the future.Two questions:
My thoughts are that the flow demands of the oil system will be the same without increasing rpm, but with more oil to move, maintaining pressure might be more of a challenge. In my circumstances I’m assuming a high pressure pump like the melling 10295 would be a better choice than the high volume option. Expert opinions on that?
Second question. Assuming the pump is shimmed properly, is there a downside to running a high pressure pump if it’s not necessary? Is this something where overkill could be detrimental or is it just an extra $60 spent it’s something I don’t really need. Id rather overbuild and be safe than find out the hard way my pressure is inadequate.
thanks for your time
Ly6 build, Cletus bald eagle cam, long tubes, intake. Goal off 500hp crank +/- and keeping rpm limit at 6500. Street car that won’t see track time but will get driven with gusto quite a bit. I was originally going with a new gm oil pump but have since added a remote oil filter and accusump to the plan increasing oil volume in the system. Possibly an oil cooler in the future.Two questions:
My thoughts are that the flow demands of the oil system will be the same without increasing rpm, but with more oil to move, maintaining pressure might be more of a challenge. In my circumstances I’m assuming a high pressure pump like the melling 10295 would be a better choice than the high volume option. Expert opinions on that?
Second question. Assuming the pump is shimmed properly, is there a downside to running a high pressure pump if it’s not necessary? Is this something where overkill could be detrimental or is it just an extra $60 spent it’s something I don’t really need. Id rather overbuild and be safe than find out the hard way my pressure is inadequate.
thanks for your time
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From: Central Cal.
Keep in mind- a high pressure pump only raises the PEAK pressure. Pressure up until then is determined by the engine's resistance to oil flow, like tight or loose clearances.
A high pressure pump's only difference is the higher cracking pressure of the relief valve.
A high pressure pump's only difference is the higher cracking pressure of the relief valve.
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that was a concern of mine with my understanding of the situation. Would a high volume pump be a better solution in this scenario? Am I overthinking this lol? As long as I can maintain pressure with those different add ons to the oil system that’s obviously the goal.
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From: Central Cal.
Unless you have looser than normal clearances and/or lifters with axle oiling, you do not need a higher volume pump.
A remote filter and/or Accusump does not change any volume demands on the oil system. Nor do they bleed off pressure. Even a stock-spec pump would be fine in your situation.
A remote filter and/or Accusump does not change any volume demands on the oil system. Nor do they bleed off pressure. Even a stock-spec pump would be fine in your situation.
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Unless you have looser than normal clearances and/or lifters with axle oiling, you do not need a higher volume pump.
A remote filter and/or Accusump does not change any volume demands on the oil system. Nor do they bleed off pressure. Even a stock-spec pump would be fine in your situation.
A remote filter and/or Accusump does not change any volume demands on the oil system. Nor do they bleed off pressure. Even a stock-spec pump would be fine in your situation.
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The higher the oil pressure, the higher the entrained air capacity. (aeration) This increases exponentially above ~70 psi. There's no benefit to having oil pressure higher than 70 psi in any application.
It's highly unlikely that the addition of the remote oil filter setup and potential oil cooler will have any noticeable effect on oil flow or pressure with an OEM pump. Even if pressure does fall a few psi, it doesn't matter. The OEM pump is already multiple times more than what the engine actually needs.
High pressure pumps are a solution looking for a problem.
It's highly unlikely that the addition of the remote oil filter setup and potential oil cooler will have any noticeable effect on oil flow or pressure with an OEM pump. Even if pressure does fall a few psi, it doesn't matter. The OEM pump is already multiple times more than what the engine actually needs.
High pressure pumps are a solution looking for a problem.
Last edited by Polyalphaolefin; Mar 28, 2022 at 04:47 PM.
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In Pro Mods making 4,000 hp, we're lucky to see double digits at idle. Often times, it's barely bouncing off zero. Even up at 8-9k rpm, they might see 40-50 psi. That's if they even monitor it, which many don't. So long it has at least 6 gpm flow, send it.
How often do those engines get torn down?
LS engines have a direct drive gerotor pump that makes gobs of oil flow at low rpm. The challenge is maintaining oil flow at high rpm. The pump flow rate flatlines and then begins to fall ~6000 rpm. The higher volume pump (Melling 10296) helps with oil flow at higher rpm. Schumann makes modified pumps that behave even better.
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