oil pressure
Mar 16, 2009 | 06:48 PM
Thread Starter
Pro
Joined: Feb 2006
Posts: 501
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From: Vancouver WA
oil pressure
10-15 psi ok at idle? sounds like it might be a little low but? what cause low oil pressure? bad pump? the motor doesnt knock at all, its an lt4
Mar 16, 2009 | 07:36 PM
Melting Slicks
Joined: May 2007
Posts: 2,171
Likes: 1
From: Warwick RI
I wouldn't sweat that at hot idle.
I have seen older motors(like mine) that are loose and that is about right for hot idle. Let's wait for some LT4 gurus to chime in to be safe but as i wrote it wouldn't alarm me.
Mar 16, 2009 | 08:08 PM
Safety Car
Joined: Sep 2002
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From: The reason time exists is so everything doesn't happen at once
Doesn't appear to be too low. Does the pressure increase as soon as the revs increase?
Mar 16, 2009 | 08:11 PM
Team Owner
Joined: Aug 2005
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
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St. Jude Donor '09 thru '20
I notice my LT4 doing that, it gets up to 40+ once I rev it. I can't wait to put this animal on the road
Mar 16, 2009 | 10:06 PM
Le Mans Master
Joined: Aug 2007
Posts: 8,735
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From: WV
Thats about what my L98 has at hot idle an I haven't had any problems...WW
Mar 17, 2009 | 02:53 PM
Melting Slicks
Joined: May 2007
Posts: 2,075
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From: Longmont Co
Ten sounds a little low to me. On an LT1 you want to see a floor of about 15-20 at hot idle.
Mar 17, 2009 | 03:21 PM
Joined: Feb 2006
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From: Downtown Annapolis, MD. The Future is where we all have to live. Let's not screw it up.
St. Jude Donor '08-'09-'10-'11
I've never seen my stock '88 (131k) L98 pressure below 22 on the hottest of summer days.
Mar 17, 2009 | 08:51 PM
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Quote:
Originally Posted by
Camaro350z28
10-15 psi ok at idle? sounds like it might be a little low but? what cause low oil pressure?
How many miles?
On higher mileage engines indicative of increased clearances on the crank journals bleeding off pressure.
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Mar 17, 2009 | 08:59 PM
Thread Starter
Pro
Joined: Feb 2006
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From: Vancouver WA
Mar 17, 2009 | 09:28 PM
Race Director
Joined: Jun 1999
Posts: 14,924
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From: Merritt Ils Fl
Old time rule of thumb: 10 PSI for each 1000 RPM.
Mar 18, 2009 | 04:09 PM
Melting Slicks
Joined: May 2007
Posts: 2,075
Likes: 109
From: Longmont Co
Quote:
Originally Posted by
Muffin
Old time rule of thumb: 10 PSI for each 1000 RPM.
If I was only getting 20psi at 65 mph I would be worried as he**
Mar 18, 2009 | 05:52 PM
Melting Slicks
Joined: May 2007
Posts: 2,171
Likes: 1
From: Warwick RI
Quote:
Originally Posted by
markKlein
If I was only getting 20psi at 65 mph I would be worried as he**
Why?