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Old 02-08-2007, 02:53 PM   #1
STI@LI
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Default normal sti oil pressure?

What is the normal pressure range in a sti when idle and when at wot?
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Old 02-08-2007, 03:06 PM   #2
Okeyd57
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Mine runs 70 lbs. cold. Hot, it idles between 10-15 lbs., and about 60 lbs. wot
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Old 02-08-2007, 03:21 PM   #3
STI@LI
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Mine seems to run about 100psi, I was wondering if it could be the way my gauge is hooked up or if the sender is broke? I used a greddy oil sandwich adaptor. My idle pressure is about 15lbs also.
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Old 02-10-2007, 07:04 AM   #4
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Im in the same boat as you are. Get anywhere with it?
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Old 03-18-2007, 12:26 PM   #5
STI@LI
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No, but I think its the sender.
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Old 03-18-2007, 02:43 PM   #6
cbourbs
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at warm idle it's about 2 bar. and when at WOT it's about 6 bar.
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Old 03-18-2007, 03:15 PM   #7
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Quote:
Originally Posted by STI@LI View Post
Mine seems to run about 100psi, I was wondering if it could be the way my gauge is hooked up or if the sender is broke? I used a greddy oil sandwich adaptor. My idle pressure is about 15lbs also.
Is this when it is warm, or cold. Cold oil psi is 100.
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Old 03-18-2007, 07:53 PM   #8
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on my autometer gauge it is at 100 psi when cold, 20 psi at warm idle and 75 psi at warm WOT
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Old 03-18-2007, 07:56 PM   #9
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i see about 30-35psi when warm. ( idles at 1100) and about 75-80psi when cruising ~3k and at WOT i see 80psi.. 85-95 when idling cold.
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Old 03-19-2007, 01:20 AM   #10
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Oil pressure doesn't change if you are WOT or NOT. Only RPM.
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Old 03-19-2007, 07:10 PM   #11
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^ I figured as much.

bump for a good thread.
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Old 03-19-2007, 11:57 PM   #12
kevinh211
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this is mine
cold about 100psi give or take
warm idle 30-40psi
warm in gear 80psi
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Old 03-20-2007, 12:43 PM   #13
adesso
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Doesn't it really depend on how and where you have your pressure sensor hooked up, as well as what weight oil you are using? I'm using the oil galley plug on the top back portion of the block, running Amsoil 0w-30 Series 2000. I typically see cold oil pressure at 87PSI, warm idle is 29PSI.
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Old 03-20-2007, 02:38 PM   #14
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Cold Idle ~100
At Temp Idle ~20
At Temp in Gear ~80
WOT ~85
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Old 03-21-2007, 02:53 AM   #15
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Quote:
Originally Posted by drees View Post
Oil pressure doesn't change if you are WOT or NOT. Only RPM.
I'll say it again.
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Old 03-21-2007, 08:48 AM   #16
Mykl
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Unless our Subarus are unique in some way, the general rule is that you want roughly 10 psi of pressure for every 1000 RPMs. If you're way over that, you may want to consider using a lighter weight oil.
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Old 03-21-2007, 10:01 AM   #17
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Quote:
Originally Posted by Mykl View Post
Unless our Subarus are unique in some way, the general rule is that you want roughly 10 psi of pressure for every 1000 RPMs. If you're way over that, you may want to consider using a lighter weight oil.
That does not hold true with the subaru's.
My hot idle is ~20psi. I have 75psi at 2000rpm. This is on 10-40 dino.

TMS
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Old 03-21-2007, 10:04 AM   #18
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Quote:
Originally Posted by TheMadScientist View Post
That does not hold true with the subaru's.
My hot idle is ~20psi. I have 75psi at 2000rpm. This is on 10-40 dino.

TMS
75 psi at 2000 RPM's??? There has to be something wrong with the pressure sender or gauge. That can't be right.
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Old 03-21-2007, 10:51 AM   #19
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It is.
I have seen the same on many other subarus. They run stupid oil pressures.

TMS
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Old 03-21-2007, 12:46 PM   #20
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Man, that's just wierd... is this a boxer engine thing or just a Subaru thing?
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Old 03-21-2007, 12:50 PM   #21
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Quote:
Originally Posted by Mykl View Post
Man, that's just wierd... is this a boxer engine thing or just a Subaru thing?
My years hotroding SB chevy's your rule of thumb aplies. When I got my first subaru and put an oil pressure gauge on it I went WTF. Every subaru I have seen runs stupid amounts of oil pressure compared to the old V8's.

TMS
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Old 03-21-2007, 01:22 PM   #22
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I'll say this about Subaru oil pressure...if you want to run a b.b. turbo on a Subaru you better put a resrictor in the oil line like Garrett recomends. I know there are some turbo manufaturers that sell b.b. turbos w/o oil line resrictors for Subaru applications. IMO this is........wrong.

I think Garrett says like 40psi max with their b.b. center cartridge.
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