Another Oil pressure question
Thread Starter
Burning Brakes
Joined: Apr 2006
Posts: 976
Likes: 1
From: Lincoln NE
Another Oil pressure question
about 5 months back i did a cam swap... when i got everything mechancially working i noticed my oil pressure wasn't what i was expecting... I had also replaced the oil pump to a ported LS6 pump... I was expecting high pressure... well i didn't i actually got some really low pressure during the dead of summer (23#s) as the temps have cooled off my oil pressure remains at about 35psi.. after a cold start around 40-45. I changed my oil yesterday with some lucas syn. and 10W30 mobil one... oil pressure readings get up to 75... i haven't rowed through the gears up to redline to see how high it will go...
is this normal for going to a heavier oil? I think previous i had 5w30 with 1qt 0w40
is this normal for going to a heavier oil? I think previous i had 5w30 with 1qt 0w40
Racer
Joined: Oct 2006
Posts: 445
Likes: 0
From: State of Perplexity California
Originally Posted by Evil-Twin
Lucas oil products do NOT meet the very specific requirements of an LS1/6. I would never use this oil in a C5.
Do you know if Valvoline Synthetic meets these requirements? The Valvoline web site states it meets the requirements for BMW, Lexus, Corvette, etc., but it does not state WHICH corvette. I don't see the GM spec on the Valvoline website either. I ask because that's what I put in when I got the car about 3k miles ago. The requirements sound very specific from what you are saying, and I don't want to screw this up. Thanks.
Edit- sorry all, not trying to hijack the thread. Carry on all, I'll contact Valvoline about this. -toxdoc
Last edited by toxdoc; Oct 28, 2006 at 08:19 PM.
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Originally Posted by toxdoc
ET,
Do you know if Valvoline Synthetic meets these requirements? The Valvoline web site states it meets the requirements for BMW, Lexus, Corvette, etc., but it does not state WHICH corvette. I don't see the GM spec on the Valvoline website either. I ask because that's what I put in when I got the car about 3k miles ago. The requirements sound very specific from what you are saying, and I don't want to screw this up. Thanks.
Edit- sorry all, not trying to hijack the thread. Carry on all, I'll contact Valvoline about this. -toxdoc
Do you know if Valvoline Synthetic meets these requirements? The Valvoline web site states it meets the requirements for BMW, Lexus, Corvette, etc., but it does not state WHICH corvette. I don't see the GM spec on the Valvoline website either. I ask because that's what I put in when I got the car about 3k miles ago. The requirements sound very specific from what you are saying, and I don't want to screw this up. Thanks.
Edit- sorry all, not trying to hijack the thread. Carry on all, I'll contact Valvoline about this. -toxdoc
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Originally Posted by patton
ITS A HIGH VOLUME NOT HIGH PSI unreal
The pressure will go up until the pressure relief valve opens to prevent over pressure to the system.
Last edited by ZeeOSix; Oct 29, 2006 at 01:38 AM.
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Thread Starter
Burning Brakes
Joined: Apr 2006
Posts: 976
Likes: 1
From: Lincoln NE
i'm not worried about the lucas oil... i've enjoyed it for years and won't stop now because it's missing a lable..
but back on topic... i'm ideling at 45psi and can get up to 75psi... before that 40-45 was my highest... I understand the ported pump does is to flow more volume and not increase pressure.. Actually to me it would make more sense for pressure to drop with a ported pump but TSP told me to expect 5-10psi increase...
Will low oil levels reduce pressure?
but back on topic... i'm ideling at 45psi and can get up to 75psi... before that 40-45 was my highest... I understand the ported pump does is to flow more volume and not increase pressure.. Actually to me it would make more sense for pressure to drop with a ported pump but TSP told me to expect 5-10psi increase...
Will low oil levels reduce pressure?
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Originally Posted by N0TDADYS_98
I changed my oil yesterday with some lucas syn. and 10W30 mobil one... oil pressure readings get up to 75...
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Originally Posted by N0TDADYS_98
I understand the ported pump does is to flow more volume and not increase pressure.. Actually to me it would make more sense for pressure to drop with a ported pump but TSP told me to expect 5-10psi increase...
The only way you could get more flow while keeping the pressure the same, is by reducing the resistance of the system. The resistance of the system in an engine is defined by the mechanical design of the oiling system and the clearances of all the bearings, etc that the oil flow travels through. That's why oil pressure goes down when the main bearings get destroyed ... because the clearances have become huge which makes the resistance to oil flow a lot less. I would believe TPS, and it makes sense and jives with what I've said above.
Thread Starter
Burning Brakes
Joined: Apr 2006
Posts: 976
Likes: 1
From: Lincoln NE
Originally Posted by ZeeOSix
Well, I don't see how any oil pump could actually increase the oil flow through an engine without increasing the oil pressure. You can't change the laws of fluid dynamics. It takes more pressure to move more volume through a fixed path of resistance. It's no different than getting more flow out a garden hose with more pressure.
The only way you could get more flow while keeping the pressure the same, is by reducing the resistance of the system. The resistance of the system in an engine is defined by the mechanical design of the oiling system and the clearances of all the bearings, etc that the oil flow travels through. That's why oil pressure goes down when the main bearings get destroyed ... because the clearances have become huge which makes the resistance to oil flow a lot less. I would believe TPS, and it makes sense and jives with what I've said above.
The only way you could get more flow while keeping the pressure the same, is by reducing the resistance of the system. The resistance of the system in an engine is defined by the mechanical design of the oiling system and the clearances of all the bearings, etc that the oil flow travels through. That's why oil pressure goes down when the main bearings get destroyed ... because the clearances have become huge which makes the resistance to oil flow a lot less. I would believe TPS, and it makes sense and jives with what I've said above.
Thread Starter
Burning Brakes
Joined: Apr 2006
Posts: 976
Likes: 1
From: Lincoln NE
Originally Posted by ZeeOSix
But at what RPM? I see 65 psi with a bone stock Z06 at 4000 RPMs with 210 deg F oil.
Melting Slicks
Joined: Jun 2004
Posts: 3,439
Likes: 6
From: Newark, DE
St. Jude Donor '06
Originally Posted by N0TDADYS_98
I changed my oil yesterday with some lucas syn. and 10W30 mobil one...
Ref: http://www.bobistheoilguy.com/images/lucas/lucas.htm
