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Author
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Topic: 460 oil pressure concerns
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Rustang
Gearhead Posts: 471
From: Clarion PA
Registered: Nov 2000
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posted 11-16-2002 05:39 PM
   
I've been running my new 460 in my '78 F150 for 4 months now, and I'm real impressed with it. However I'm a little worried about the way the oil pressure is acting. With the engine at operating temp, at 70mph (3.55 gears and 26" tall tires= approx 3400rpm  ) oil pressure sits at about 42 psi. When I run it up to around 100 or so the oil pressure progressively drops to around 35psi. This don't seem right to me! (I'm running a hi-volume melling pump and stock unbaffled oil pan and stock valvetrain.) I'm not familiar with 460's so I don't know if they're known for funky oil pressure or not?!?!  ------------------
'68 mustang 351 clevor- 10.92@124
'67 Stang, 351W -11.18@118
'69 351C Torino-14.90@100
'78 Pickup 351W-15.56@88
'79 Pickup 460 ET=??
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bluestreek
Gearhead Posts: 1289
From: Athens,GA
Registered: Jul 2001
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posted 11-16-2002 09:38 PM
It's possible that the HV pump and stock pan could be causing the oil to get mixed with a little air at high rpms. I would never run a HV pump at high rpms without a good pan to match. ------------------
1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, ported TFS alum. heads, ported Stealth 8020 intake, CompCams Xtreme Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi, BFG Drag radials..
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Mario428
Journeyman Posts: 61
From: Charlottetown, PEI, Canada
Registered: Nov 2001
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posted 11-17-2002 08:35 AM
That HV pump is drying up the pan. So much oil spinning around with the crank and staying in the lifter valley there is not enough at the pickup. Try just throwing an extra quart in the engine and see what happens.
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