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hey guys, i have been eyeing my oil pressure guage at wot and it seems to dip down a ways ... goes from ~60 to just below the 40 mark then comes back. I did some reading and it seems that this is a pretty common thing in lt1's. Is this a real issue that needs addressed or what? If it's something that needs fixed what are your recommendations?
I'm running a stock pan with stock replacement melling oil pump.
Pickup didn't fall off did it?
its the only pressure issue I have, besides the pickup was tacked on iircQuote:
Originally Posted by Fastbird
Pretty common problem. Someone on another forum figured out why i think but i forgot what it was.
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If its common then I wouldn't worry about it, But Ive seen gummed up engines from lack of oil change lose pressure at higher rpms because the pickup screen will gunk up when it tries to suck a bunch of oil up and the pump is trying to pull more oil that the pickup will let it.
You have the windage tray installed right? I don't get any change in pressure during WOT runs but I have Moroso pan and Melling select pump.
Most likely a windage issue.
there was a thread on ls1tech in the lt1 section were a few guys were seeing this issue I remember a thread with a lot of guys talking about it . It was about 1-2 years ago. I thought I rember seeing ur name in.Quote:
Originally Posted by Mystery Bird
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Stock pan, blueprinted stock pump with high pressure spring, stock windage tray, 7,200RPM redline. No drop in pressure.
The only time I lost pressure a couple of years ago was when I over revved stock bottom end and spun rod bearings.Quote:
Originally Posted by AdamG
might be a dumb question but you have enough oil in there right?
also could it be just a cheap filter, and the bypass valve is making it drop pressure?
maybe I should invest in the white pressure spring? Yes its full of oil lol, and i'm running a wix filter. Engine isn't really very old it shouldn't be having trouble with the screen plugging up...
This has been posted many times over the years. The overwhelming consensus is there are times the stock windage tray allows for agitation of the oil. What you can do is run the engine a quart low, do some hard acceleration runs and see what happens. If the pressure is stable then it is indeed a windage issue.
I will give this a try next time i change oil which will happen when i do my ac delete/alt relocationQuote:
Originally Posted by SS RRR
I had the same issue years ago. Turned out that for some folks the factory dipstick is not labled correctly. You end up putting too much oil in the pan and the crank aerates it which causes a loss in pressure. Change your oil, put only 5 quarts in total and you should be alright. That worked for me.