oil pressure? - Pirate4x4.Com : 4x4 and Off-Road Forum

TxCruzr · 07-11-2006, 06:06 PM

I'm probably being paranoid but I don't want to replace another motor so its ok this time

Newly rebuilt 383, has about 600 miles give or take.
When the motor is warmed up to about 180*, the oil pressure when stoped at a stop light is at 13-15, which is about at 600-700rpms. At 2000rpms the oil pressure is at 40 and at 2500rpms it is at 45. That seems right, but I just don't remember it getting down to 12 or 13 when ideling before?
What generally is acceptable and if 12-15 is fine, than what is low oil pressure, 0?
Thanks

fatexassk5 · 07-11-2006, 06:11 PM

Quote:

Originally Posted by TxCruzr

I'm probably being paranoid but I don't want to replace another motor so its ok this time

Newly rebuilt 383, has about 600 miles give or take.
When the motor is warmed up to about 180*, the oil pressure when stoped at a stop light is at 13-15, which is about at 600-700rpms. At 2000rpms the oil pressure is at 40 and at 2500rpms it is at 45. That seems right, but I just don't remember it getting down to 12 or 13 when ideling before?
What generally is acceptable and if 12-15 is fine, than what is low oil pressure, 0?
Thanks

i would imagine bad oil pressure would be when you cruising at like 2700 rpms doin about 60 and your o/p is 10. I had the same problem when i built my last 383, i just put a super high volume oil pump back in it, it was running with the stock one for a while and would do the same thing. At crawling speed i beleive i even had it ass low as 5 psi one time.

redtruck · 07-11-2006, 07:09 PM

I always heard 10 lbs per 1000 RPM's so 10 at 1000, 20 at 2000 and so on.

GMCTruxrule · 07-11-2006, 08:09 PM

Oil pressure with a stock pump should run somewhere in the range you are having.
What you are describing above is normal.
A lot of people will tell you to run a high volume oil pump, but on a stock engine that doesn't see redline duty on a regular basis, a stock oil pump is adequate to keep your motor oiled.

TxCruzr · 07-11-2006, 08:25 PM

I thought it was ok, but I didn't want to burn this motor up. I like it too much

I've always read that the high volume oil pumps could run dry when crawling at the steep angles and low rpms that we do.
Thanks for the info.

4doorchevy · 07-11-2006, 08:36 PM

Quote:

Originally Posted by redtruck

I always heard 10 lbs per 1000 RPM's so 10 at 1000, 20 at 2000 and so on.

X2

Tim84K10 · 07-11-2006, 11:53 PM

Quote:

Originally Posted by TxCruzr

I've always read that the high volume oil pumps could run dry when crawling at the steep angles and low rpms that we do.

That's a myth.

florida4x4 · 07-12-2006, 12:42 AM

the story I heard is the HV oil pumps will suck the pan dry going through the quarter...

07-11-2006, 06:06 PM	#1 (permalink)
TxCruzr Wait this ain't Tx.. Join Date: Jan 2002 Member # 9380 Location: Del Boca Vista, AZ Posts: 2,191	oil pressure? I'm probably being paranoid but I don't want to replace another motor so its ok this time Newly rebuilt 383, has about 600 miles give or take. When the motor is warmed up to about 180, the oil pressure when stoped at a stop light is at 13-15, which is about at 600-700rpms. At 2000rpms the oil pressure is at 40 and at 2500rpms it is at 45. That seems right, but I just don't remember it getting down to 12 or 13 when ideling before? What generally is acceptable and if 12-15 is fine, than what is low oil pressure, 0? Thanks __________________ "There is no hunting like the hunting of man, and those who have hunted armed men long enough and liked it, never care for anything else thereafter." -Ernest Hemingway* '69 FJ-40 - under construction

07-11-2006, 07:09 PM	#3 (permalink)
redtruck Granite Guru Join Date: Jul 2003 Member # 21493 Location: DBQ Posts: 750	I always heard 10 lbs per 1000 RPM's so 10 at 1000, 20 at 2000 and so on. __________________ 92 chevy sfa 89 S-10 sfa

07-11-2006, 08:09 PM	#4 (permalink)
GMCTruxrule Registered User Join Date: Aug 2005 Member # 51243 Location: Tropical Paradise Posts: 3,408	Oil pressure with a stock pump should run somewhere in the range you are having. What you are describing above is normal. A lot of people will tell you to run a high volume oil pump, but on a stock engine that doesn't see redline duty on a regular basis, a stock oil pump is adequate to keep your motor oiled. __________________ [COLOR="Lime"][B]1999 Chevy K3500, 5.7/4L80E/14FF/stock/stock/stock[/B][/COLOR]

07-11-2006, 08:25 PM	#5 (permalink)
TxCruzr Wait this ain't Tx.. Join Date: Jan 2002 Member # 9380 Location: Del Boca Vista, AZ Posts: 2,191	I thought it was ok, but I didn't want to burn this motor up. I like it too much I've always read that the high volume oil pumps could run dry when crawling at the steep angles and low rpms that we do. Thanks for the info. __________________ "There is no hunting like the hunting of man, and those who have hunted armed men long enough and liked it, never care for anything else thereafter." -Ernest Hemingway '69 FJ-40 - under construction

07-12-2006, 12:42 AM	#8 (permalink)
florida4x4 Beaver Pleaser Join Date: Sep 2002 Member # 13645 Location: home of the wayward dirt bike Posts: 1,437 Blog Entries: 1	the story I heard is the HV oil pumps will suck the pan dry going through the quarter... __________________ 1972 GMC Submarine 383 / TH350 / 203D-NP205 / D60 / 14FF / 42's on Stazworks / heavy foote / four eyez Inclined to brute force attack a 70* incline with a Quadrajet 1997 GMC K3500 Suburban TC76 L33 / 4L80E / HP60 SAS / PROJECT TOWHOE

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