Oil Pressure?!
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Originally Posted by CALL911
20-25 is normal for a warmed up LT1. I would figure that it also would be for an LS1. Is it not? My newly purchased LS1 idles 20-25 once its warmed up.
i use 10w-30 royal purple
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Originally Posted by CALL911
20-25 is normal for a warmed up LT1. I would figure that it also would be for an LS1. Is it not? My newly purchased LS1 idles 20-25 once its warmed up.
these cars do not function on that redneck bullshit idea of 10psi per 1000 rpms....whoever keeps spreading that on here should be taken out and shot....because im sure theyve ruined alot of guys motors with that talk...
for example in theory......a A4 car idles around 500rpms (mine does)...soo my engine would function at 5psi with no problems?!?!...WTF
what ive learned from experience and two gm techs....at 1000rpms your car should be have a psi around 30....AT LEAST
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ive had 3 ls1 motors....my first with 46k miles on it idle'd at 28 psi...and spun 2 bearings in the process due to lack of lubrication....
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Originally Posted by staringback05
nope pedro....an LT1 will idle with a lower psi but just slightly...and if your idleing in a ls1 with 20-25 constant...youve got a problem....
these cars do not function on that redneck bullshit idea of 10psi per 1000 rpms....whoever keeps spreading that on here should be taken out and shot....because im sure theyve ruined alot of guys motors with that talk...
for example in theory......a A4 car idles around 500rpms (mine does)...soo my engine would function at 5psi with no problems?!?!...WTF
what ive learned from experience and two gm techs....at 1000rpms your car should be have a psi around 30....AT LEAST
ive had 3 ls1 motors....my first with 46k miles on it idle'd at 28 psi...and spun 2 bearings in the process due to lack of lubrication....
these cars do not function on that redneck bullshit idea of 10psi per 1000 rpms....whoever keeps spreading that on here should be taken out and shot....because im sure theyve ruined alot of guys motors with that talk...
for example in theory......a A4 car idles around 500rpms (mine does)...soo my engine would function at 5psi with no problems?!?!...WTF
what ive learned from experience and two gm techs....at 1000rpms your car should be have a psi around 30....AT LEAST
![Chug! Chug! Chug!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_chug.gif)
ive had 3 ls1 motors....my first with 46k miles on it idle'd at 28 psi...and spun 2 bearings in the process due to lack of lubrication....
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Originally Posted by staringback05
my first with 46k miles on it idle'd at 28 psi...and spun 2 bearings in the process due to lack of lubrication....
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28psi at idle isn't going to kill an LS1. Perhaps you were making lower than needed oil pressure at higher rpms. I see 25-30psi in summer weather under certain circumstances at idle (very hot outside temps, or A/C on, or extended idling period, or heavy traffic, or any combo of the former), other times I see 35ish.
But no matter what, oil pressure flies well past 40 as soon as I start to give it a bit of gas. I'm well past 50psi by the time I hit 3,000 rpm, and it just keeps going up from there.
No harm done. No worries here.
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Within the last week or two I've noticed my oil pressure decreasing as well. The temperature has warmed up from around freezing to 70's so I think that's part of why I'm just now noticing it. Cold idle I get about 40, but after it warms up the warm o/p is 22-25 psi. I have an A4 so in gear it idles around 600 rpm. When it's cold the oil pressure goes up to about 60 psi at 4k and warm the o/p at 4k is about 40 - 45 psi
. I know this is lower than I saw last summer so I'm going to start with the sensor. I know it's behind the intake. Any helpful hints on how to change it? I was also planning on using autorx as soon as it arrives.
BTW I changed the oil less than a 1k miles ago w/ mobil 10/30 and mobil filter, and yes it's still full. I also notice something odd. When I'm on the highway and the t/c is locked up, if I give it a little gas the pressure goes down a couple psi and when I let off the throttle it comes back up a couple psi. Kind of weird. Maybe this provides some additions clues?
Oh yeah, 98 t/a with 118k miles.
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BTW I changed the oil less than a 1k miles ago w/ mobil 10/30 and mobil filter, and yes it's still full. I also notice something odd. When I'm on the highway and the t/c is locked up, if I give it a little gas the pressure goes down a couple psi and when I let off the throttle it comes back up a couple psi. Kind of weird. Maybe this provides some additions clues?
Oh yeah, 98 t/a with 118k miles.
Last edited by imflyn; 03-14-2007 at 06:00 PM.
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Originally Posted by staringback05
hmm thats kinda a thin oil....i guess it doesnt get as hot up there as down here....and if your getting that good of pressure...ooo well
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Originally Posted by imflyn
I also notice something odd. When I'm on the highway and the t/c is locked up, if I give it a little gas the pressure goes down a couple psi and when I let off the throttle it comes back up a couple psi. Kind of weird. Maybe this provides some additions clues?
But first, I'd check the sending unit for accuracy.
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Originally Posted by staringback05
^^^ understandable....but i think you'd also agree that 20-25 is unhealthy
My only point on this (as always when we have this debate
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Originally Posted by RPM WS6
That is not good. Pressure drop as throttle is applied can = worn bearings.
But first, I'd check the sending unit for accuracy.
But first, I'd check the sending unit for accuracy.
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Originally Posted by imflyn
DOH! That's not what I wanted to hear. I'm going to call around tomorrow and try to find a place to put a mechanical gauge on there and check it out.
HOWEVER, I wouldn't get too concerned until you've ruled out a bad sending unit.
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Link to article, no BS about "my friend knew this guy who heard". Otherwise, STFU.
And your 'buddy' had a hell of a lot more wrong if "metal shavings" got anywhere.
And your 'buddy' had a hell of a lot more wrong if "metal shavings" got anywhere.
Originally Posted by XofXtimeX
I don't mean to scare you by any means. But my friend read a article where they tested multiple brands of oil filters and K&N was actually rated one of the worst ones. Not to mention I know a guy that had a K&N oil filter in his car and it collapsed on the inside and unfiltered oil ran through his car and metal shavings got inside his engine and he developed a tick. He then replaced it with another K&N and it also collapsed...
Mobile 1 and I believe AC delco rated 2 of the top brands.
Mobile 1 and I believe AC delco rated 2 of the top brands.
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Originally Posted by Boodyrider
Link to article, no BS about "my friend knew this guy who heard". Otherwise, STFU.
And your 'buddy' had a hell of a lot more wrong if "metal shavings" got anywhere.
And your 'buddy' had a hell of a lot more wrong if "metal shavings" got anywhere.
I've read that K&N is one of the best. Also top ranked are the M1 filters, and the old AC Delco Ultraguard Gold (discontinued).
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Originally Posted by RPM WS6
It's never a good thing when you see a pressure drop as throttle is applied.
HOWEVER, I wouldn't get too concerned until you've ruled out a bad sending unit.
HOWEVER, I wouldn't get too concerned until you've ruled out a bad sending unit.