Notices
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Oil pressure?

Thread Tools
 
Search this Thread
 
Old Nov 16, 2006 | 11:03 PM
  #1  
oxfordgt's Avatar
oxfordgt
Thread Starter
|
New User
Joined: Sep 2006
Posts: 11
Likes: 0
Oil pressure?

I have an 85 F250 with a 351w. I bought it for $500 and am restoring it. I fixed just about everything wrong with the engine so far but I need to know what the oil pressure is supposed to be at idle. Also it has an aftermarket oil pressure gauge cause the stock no longer works. Im not sure if the gauge reads correctly so how can I find out. Right now it reads 20psi at idle (950 rpms).
 
Reply
Old Nov 16, 2006 | 11:10 PM
  #2  
85e150's Avatar
85e150
Super Moderator
20 Year Member
Community Builder
Liked
Community Favorite
Joined: Apr 2004
Posts: 34,475
Likes: 2,800
Club FTE Gold Member
20 at idle is plenty. Not sure what the new engine factory spec would be, but you need surprisingly little op at idle, and 20 is fine.
 
Reply
Old Nov 17, 2006 | 01:10 AM
  #3  
Piffery1's Avatar
Piffery1
Posting Guru
Joined: Jun 2004
Posts: 1,635
Likes: 0
From: Niceville, FL.
Factory spec for '83 351W is 40-60 psi at 2000 rpm (hot).
 
Reply
Old Nov 17, 2006 | 08:41 AM
  #4  
oxfordgt's Avatar
oxfordgt
Thread Starter
|
New User
Joined: Sep 2006
Posts: 11
Likes: 0
Thanks alot guys. I think it is working ok but it doesnt always go to 40psi at 2000rpms (hot). What can I do to get the pressure up?
 
Reply
Old Nov 17, 2006 | 10:28 AM
  #5  
Piffery1's Avatar
Piffery1
Posting Guru
Joined: Jun 2004
Posts: 1,635
Likes: 0
From: Niceville, FL.
A "rule of thumb" is 10 psi per 1000 rpm is adequate.
 
Reply
Old Nov 17, 2006 | 11:18 AM
  #6  
Sycostang67's Avatar
Sycostang67
Lead Driver
20 Year Member
Liked
Loved
Joined: Dec 2002
Posts: 5,491
Likes: 16
From: Kuna ID
You can try using a heavier oil to get the pressure up.
 
Reply
Old Nov 17, 2006 | 06:53 PM
  #7  
Piffery1's Avatar
Piffery1
Posting Guru
Joined: Jun 2004
Posts: 1,635
Likes: 0
From: Niceville, FL.
Also, be wary of "El Cheapo" aftermarket gauges; they may be very inaccurate. I've got one that takes 14 psi to move off of zero but, it's pretty good from 30 psi up. The better gauges use copper tubes, cheapies use plastic (in general).
 
Reply
Old Nov 23, 2006 | 12:47 AM
  #8  
clunker86's Avatar
clunker86
Senior User
Joined: Jul 2006
Posts: 462
Likes: 0
i just put a new rebuilt engine in my 86 f250 from adavance. i have around 1300 miles on my 400 and when first started (cold) it set right at 60psi and after hot (190deg) it sets right above 20 psi at 6-900rpm. and regluar interstate speeds holds at 40psi
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-1

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-2

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-3

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-4

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-5

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
story-6

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

 Michael S. Palmer
story-7

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
story-8

Top 10 Ford Trucks Coming to Mecum Indy 2026

 Brett Foote
story-9

5 Best / 5 Worst Ford Truck Wheels of All Time

 Joe Kucinski




All times are GMT -5. The time now is 07:49 PM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE