torque screw questions.. - Ford Truck Enthusiasts Forums



Pre-Power Stroke Diesel (7.3L IDI & 6.9L) Diesel Topics Only

torque screw questions..

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 02-09-2014, 04:50 PM
d-day's Avatar
d-day d-day is offline
Elder User
Thread Starter
 
Join Date: Nov 2013
Location: Manteca
Posts: 630
d-day is starting off with a positive reputation.
torque screw questions..

I know this has been brought up a number of times.. I am just looking for a little more bottom end, I have a 6.9 that is naturally aspirated. The pump and injectors came out of a 7.3, that were rebuilt. Any help would be appreciated on this torque screw meaning which way in or out lol, & I do have a pyro, like I said I'm just looking for a little more bottom and and not really looking for a smokeshow. Here are some pictures just to make sure this is the screw





And I also used the lines of of the 7.3
Reply With Quote
  #2  
Old 02-09-2014, 05:21 PM
hairyboxnoogle's Avatar
hairyboxnoogle hairyboxnoogle is offline
Post Fiend
 
Join Date: Apr 2008
Location: Jordan Valley, OR
Posts: 5,984
hairyboxnoogle is gaining momentum as a positive member of FTE.hairyboxnoogle is gaining momentum as a positive member of FTE.
I dont think thats the screw... at least it doesnt look like mine.
Reply With Quote
  #3  
Old 02-09-2014, 06:32 PM
ifrythings's Avatar
ifrythings ifrythings is offline
Senior User
 
Join Date: Aug 2011
Posts: 476
ifrythings is gaining momentum as a positive member of FTE.
The top hex bolt would be for the top cover, the bottom stud with nut is the "Min/Max rod" (don't adjust that one) and the torx screw with no paint on it would be the torque screw. It looks like who ever rebuilt that pump just removed the torque screw all together (it should be a stud with a nut on it)



All the screw does it limit max fuel at LOW rpm so you don't get black smoke, at high rpm max fuel is limited by the internal leaf spring and the torque screw doesn't do anything.

Adjusting the screw out will give more fuel at lower rpm but if it's set correctly to begin with it won't help much if at all and all you'll get is more black smoke (and this is assuming the screw that's in there right now is even doing anything at the moment or if the pump builder just calibrated it like a pump with out the screw).

Take a look at this thread:old db2 tricks has lots of good info.
Reply With Quote
  #4  
Old 02-09-2014, 07:03 PM
FORDF250HDXLT's Avatar
FORDF250HDXLT FORDF250HDXLT is offline
Post Fiend
 
Join Date: Jul 2006
Location: Maine/Oklahoma
Posts: 15,157
FORDF250HDXLT has a brilliant futureFORDF250HDXLT has a brilliant futureFORDF250HDXLT has a brilliant futureFORDF250HDXLT has a brilliant futureFORDF250HDXLT has a brilliant futureFORDF250HDXLT has a brilliant futureFORDF250HDXLT has a brilliant futureFORDF250HDXLT has a brilliant futureFORDF250HDXLT has a brilliant futureFORDF250HDXLT has a brilliant futureFORDF250HDXLT has a brilliant future
only the 92.5 - 1994 n/a and turbo ip's have a torque screw.
Reply With Quote
  #5  
Old 02-09-2014, 07:11 PM
d-day's Avatar
d-day d-day is offline
Elder User
Thread Starter
 
Join Date: Nov 2013
Location: Manteca
Posts: 630
d-day is starting off with a positive reputation.
I'm kind of curious because my old 6.9 pump looks like this

On the back

And the 7.3 has this allen bolt?


Says: DB2-5028 on the pump tag
Reply With Quote
  #6  
Old 02-09-2014, 07:31 PM
hairyboxnoogle's Avatar
hairyboxnoogle hairyboxnoogle is offline
Post Fiend
 
Join Date: Apr 2008
Location: Jordan Valley, OR
Posts: 5,984
hairyboxnoogle is gaining momentum as a positive member of FTE.hairyboxnoogle is gaining momentum as a positive member of FTE.
yea thats what i was thinking, that torx screw is in the right spot, but doesnt look like mine. Pull it out and see what it looks like, how long is it for example? I can go out to my other pump and see how much its sticking into the pump if you like. I set it so that it would haze pretty good but not roll coal, granted i have a turbo too, but it doesnt spool that fast anyway. I had to back mine off pretty good after i turned up the fuel.
Reply With Quote
  #7  
Old 02-09-2014, 08:09 PM
d-day's Avatar
d-day d-day is offline
Elder User
Thread Starter
 
Join Date: Nov 2013
Location: Manteca
Posts: 630
d-day is starting off with a positive reputation.
I'll pull out the screw tomorrow I don't have a Torx bit or a allen wrench that will fit right now.
Reply With Quote
  #8  
Old 02-10-2014, 02:44 PM
RacinNdrummin's Avatar
RacinNdrummin RacinNdrummin is offline
Postmaster
 
Join Date: Dec 2004
Location: Maple Valley, WA
Posts: 2,943
RacinNdrummin is gaining momentum as a positive member of FTE.RacinNdrummin is gaining momentum as a positive member of FTE.
That's just a plug.

The Torque screw is just for emissions, its a metering valve limiter for snap tests and whatnot. It basically (Governor influence aside) does the same thing as putting a block of wood under your accelerator pedal.

All my pumps get a plug in place of the torque screw.
Reply With Quote
  #9  
Old 02-10-2014, 04:57 PM
d-day's Avatar
d-day d-day is offline
Elder User
Thread Starter
 
Join Date: Nov 2013
Location: Manteca
Posts: 630
d-day is starting off with a positive reputation.
Quote:
Originally Posted by RacinNdrummin View Post
That's just a plug.

The Torque screw is just for emissions, its a metering valve limiter for snap tests and whatnot. It basically (Governor influence aside) does the same thing as putting a block of wood under your accelerator pedal.

All my pumps get a plug in place of the torque screw.
So what your saying is don't F with it? Lol. I'm just curious I'll have to pull it tonight. Just looking for a little more bottom end
Reply With Quote
  #10  
Old 02-10-2014, 06:44 PM
RacinNdrummin's Avatar
RacinNdrummin RacinNdrummin is offline
Postmaster
 
Join Date: Dec 2004
Location: Maple Valley, WA
Posts: 2,943
RacinNdrummin is gaining momentum as a positive member of FTE.RacinNdrummin is gaining momentum as a positive member of FTE.
Adding a torque screw to that pump won't do anything.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Is this tint installation any good? F150Love Appearance & Dress-Up 4 07-14-2015 10:27 PM
FINALLY... Pulled my new to me 1963 F100 Out of My Neighbors Garage 1972Herbie 1961 - 1966 F-100 & Larger F-Series Trucks 19 04-06-2015 12:44 PM
Bought my neighbor's 1963 F100! 1972Herbie 1961 - 1966 F-100 & Larger F-Series Trucks 11 12-17-2014 08:25 PM
Something cool that I picked up d-day Pre-Power Stroke Diesel (7.3L IDI & 6.9L) 23 06-02-2014 10:46 PM
glow plug install 6.9 d-day Pre-Power Stroke Diesel (7.3L IDI & 6.9L) 69 12-27-2013 09:31 PM


Go Back   Ford Truck Enthusiasts Forums >

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -5. The time now is 03:27 PM.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.