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Author Topic:   460 oil pressure concerns

Posts: 471
From: Clarion PA
Registered: Nov 2000

posted 11-16-2002 05:39 PM     Click Here to See the Profile for Rustang   Click Here to Email Rustang     Edit/Delete Message   Reply w/Quote
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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Posts: 1289
From: Athens,GA
Registered: Jul 2001

posted 11-16-2002 09:38 PM     Click Here to See the Profile for bluestreek   Click Here to Email bluestreek     Edit/Delete Message   Reply w/Quote
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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Posts: 61
From: Charlottetown, PEI, Canada
Registered: Nov 2001

posted 11-17-2002 08:35 AM     Click Here to See the Profile for Mario428   Click Here to Email Mario428     Edit/Delete Message   Reply w/Quote
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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