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01-25-2004, 01:42 PM
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#1 |
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Registered User
Join Date: Jan 2000
Location: Bothell, WA
Posts: 548
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BB Oil pressure
I have a fresh 402 (less than a 1,000mi) pushing over 400HP. All parts are new or professionally rebuilt. Runs awesome but my oil pressure is a small concern. When cold the guage jumps up to 60lb and holds at any RPM. When warm (180 degrees) it is pushing 40lbs at 2500RPM and drops to between 15-20lbs when idleing. My friend has a fresh 396 in a Chevelle that produces similar pressure numbers. I am interested in how other BB motors in our trucks do in this area. Thanks for any help.
Larry |
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01-25-2004, 01:49 PM
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#2 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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If you used stock pump figures are fine.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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01-25-2004, 01:59 PM
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#3 |
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Registered User
 
Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,425
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 A GOOD RULE OF THUMB IS ---- YOU NEED 10 LBS OF OIL PRESSURE FPR EVERY 10,000 RPMS.  JOHN
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE.  THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES//LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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01-25-2004, 02:03 PM
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#4 |
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Registered User
Join Date: Nov 2003
Location: st. louis area
Posts: 1,551
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I think junkyardjon ment 10PSI for every 1,000 RPMS. I wouldnt let it bother me at all.
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75 GMC C-15 short/step factory 454, lowered |
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01-25-2004, 02:18 PM
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#5 |
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Registered User
Join Date: Jan 2000
Location: Bothell, WA
Posts: 548
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Thanks for the replies guys. Looks like I am within the normal curve.
Larry |
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01-25-2004, 03:03 PM
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#6 |
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Registered User
Join Date: Jan 2003
Location: Seattle WA
Posts: 1,466
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Larry,
That is in the ballpark and looks fine from my experience.
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FocuzTech Performance Evergreen Protective Coatings Gatorhyde...the best kept secret in spray in bed lining & protection |
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01-25-2004, 04:24 PM
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#7 |
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Recovering 67-72 Addict
Join Date: Oct 2000
Location: North Bend, WA
Posts: 1,788
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Yep, that is what I am running too....
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68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women" |
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01-25-2004, 10:23 PM
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#8 |
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Registered User
Join Date: Jan 2000
Location: Bothell, WA
Posts: 548
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Thanks again guys for the quick responses. I'll move along to the next concern now.
Larry |
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