Oil PSI
Thread Starter
Melting Slicks
Joined: Jul 2014
Posts: 2,195
Likes: 479
From: Bonita Springs Florida
Oil PSI
Curious what you guys are showing for oil pressure at idle and then at cruising.
My buddy is worried that his is too low at 30-32 PSI at Idle and 36-38 at cruising speed.
That's about what mine shows so I assume that's the normal. He was thinking around 50 PSI when cruising.
Never gave it a second thought. So I'm asking to put his mind at ease.
My buddy is worried that his is too low at 30-32 PSI at Idle and 36-38 at cruising speed.
That's about what mine shows so I assume that's the normal. He was thinking around 50 PSI when cruising.
Never gave it a second thought. So I'm asking to put his mind at ease.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,010
Likes: 12,396
From: NE South Carolina
Curious what you guys are showing for oil pressure at idle and then at cruising.
My buddy is worried that his is too low at 30-32 PSI at Idle and 36-38 at cruising speed.
That's about what mine shows so I assume that's the normal. He was thinking around 50 PSI when cruising.
Never gave it a second thought. So I'm asking to put his mind at ease.
My buddy is worried that his is too low at 30-32 PSI at Idle and 36-38 at cruising speed.
That's about what mine shows so I assume that's the normal. He was thinking around 50 PSI when cruising.
Never gave it a second thought. So I'm asking to put his mind at ease.
"The crank-driven, variable-displacement oil pump can vary the oil pressure depending on demand. Oil pressure is measured at the last bearing surface in the oiling circuit, where pressure is typically lowest, to ensure that oil pressure is sufficient, even at the last bearing in the line."
Last edited by JerryU; Dec 6, 2014 at 02:01 PM.
Thread Starter
Melting Slicks
Joined: Jul 2014
Posts: 2,195
Likes: 479
From: Bonita Springs Florida
That is about where mine is. GM states the LT1 has an energy saving feature that varies oil pressure at lower rpm. It is more than the standard spring limiting max pressure. In addition it measures pressure where it is the lowest. Quoting GM:
"The crank-driven, variable-displacement oil pump can vary the oil pressure
depending on demand. Oil pressure is measured at the last bearing surface in the oiling circuit, where pressure is typically lowest, to ensure that oil pressure is sufficient, even at the last bearing in the line."
"The crank-driven, variable-displacement oil pump can vary the oil pressure
depending on demand. Oil pressure is measured at the last bearing surface in the oiling circuit, where pressure is typically lowest, to ensure that oil pressure is sufficient, even at the last bearing in the line."
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,010
Likes: 12,396
From: NE South Carolina
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St. Jude Donor '12 thru '17
That is about where mine is. GM states the LT1 has an energy saving feature that varies oil pressure at lower rpm. It is more than the standard spring limiting max pressure. In addition it measures pressure where it is the lowest. Quoting GM:
"The crank-driven, variable-displacement oil pump can vary the oil pressure depending on demand. Oil pressure is measured at the last bearing surface in the oiling circuit, where pressure is typically lowest, to ensure that oil pressure is sufficient, even at the last bearing in the line."
"The crank-driven, variable-displacement oil pump can vary the oil pressure depending on demand. Oil pressure is measured at the last bearing surface in the oiling circuit, where pressure is typically lowest, to ensure that oil pressure is sufficient, even at the last bearing in the line."
Instructor
Joined: Feb 2014
Posts: 180
Likes: 0
From: FL
Curious what you guys are showing for oil pressure at idle and then at cruising.
My buddy is worried that his is too low at 30-32 PSI at Idle and 36-38 at cruising speed.
That's about what mine shows so I assume that's the normal. He was thinking around 50 PSI when cruising.
Never gave it a second thought. So I'm asking to put his mind at ease.
My buddy is worried that his is too low at 30-32 PSI at Idle and 36-38 at cruising speed.
That's about what mine shows so I assume that's the normal. He was thinking around 50 PSI when cruising.
Never gave it a second thought. So I'm asking to put his mind at ease.
Melting Slicks
Joined: Nov 2013
Posts: 2,016
Likes: 73
From: Texas
In the “old” days, the standard used to be 10psi/1000 rpm so the 35 psi I get at 1500rpm when hot is fine, particularly if measured at the last bearing.
Add to that, if it is a “happy” engine and by that I mean where the mating surfaces are consistent, hopefully these engines should last a very long time, particularly when using synthetics. Don
Racer
Joined: Mar 2014
Posts: 465
Likes: 29
From: Las Vegas NV
Curious what you guys are showing for oil pressure at idle and then at cruising.
My buddy is worried that his is too low at 30-32 PSI at Idle and 36-38 at cruising speed.
That's about what mine shows so I assume that's the normal. He was thinking around 50 PSI when cruising.
Never gave it a second thought. So I'm asking to put his mind at ease.
My buddy is worried that his is too low at 30-32 PSI at Idle and 36-38 at cruising speed.
That's about what mine shows so I assume that's the normal. He was thinking around 50 PSI when cruising.
Never gave it a second thought. So I'm asking to put his mind at ease.
Race Director
Joined: Jan 2014
Posts: 10,709
Likes: 7,102
From: Fulshear, TX
These days MPG is measured down to the decimals so every little bit helps. My 2nd car has a similar, variable displacement, feature for the A/C compressor so it drags as little on the engine as possible.
Team Owner
Joined: Aug 2014
Posts: 26,302
Likes: 60
From: Monaco
If you really want to get your head to spin like Regan Theresa MacNeil's in the Exorcist, go talk to a guy who builds top fuel eliminator drag motors about oil pressure vs flow and they'll give you a lecture that will make you wish you'd gone hunting or fishing instead... it seems to be a science in and of it self dependent on what the motor use will be. Or at least according to the last guy I asked, and got lost in the thought in about 3 minutes!
Curious what you guys are showing for oil pressure at idle and then at cruising.
My buddy is worried that his is too low at 30-32 PSI at Idle and 36-38 at cruising speed.
That's about what mine shows so I assume that's the normal. He was thinking around 50 PSI when cruising.
Never gave it a second thought. So I'm asking to put his mind at ease.
My buddy is worried that his is too low at 30-32 PSI at Idle and 36-38 at cruising speed.
That's about what mine shows so I assume that's the normal. He was thinking around 50 PSI when cruising.
Never gave it a second thought. So I'm asking to put his mind at ease.