Go Back   Ford Truck Enthusiasts Forums > Diesel > Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
Sign in using an external account
Register Forgot Password?


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

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 08-12-2009, 01:25 PM
84 f250 6.9's Avatar
84 f250 6.9 84 f250 6.9 is offline
Posting Guru
 
Join Date: Nov 2008
Posts: 1,190
84 f250 6.9 is starting off with a positive reputation.
how can you guys turn the fuel up so much?

ok I have heard of some guys cranking there fuel way up like 4.5 flats or as high as they will go without catastrophic results but then some of you say no absolutely not that it will burn it up if you turn it up that much.. what is a safe zone for doing this to a bone stock straight piped soup bowl deleted 6.9 ? I would like to stay aound my 20 mpg zone to
__________________
1984 f250 6.9 idi diesel 4x4 with a borg warner t19 4 speed manual with a granny gear, 7.5" western unimount plow... ROLLIN' COAL!
'96 F350 crew cab XLT dually 2wd alcoa wheels 7.3 PSD E4OD ,300,000 miles+

64,999,987 firearms owners killed noone yesterday. protect our second amendment
Reply With Quote
  #2  
Old 08-12-2009, 01:43 PM
David85's Avatar
David85 David85 is offline
Post Fiend
 
Join Date: Nov 2003
Location: Campbell River, B.C.
Posts: 6,900
David85 has a good reputation on FTE.David85 has a good reputation on FTE.
Bottoming out the fuel screw can damage the injector pump, but some like me are able to get away with it. I know mine is pretty worn out, so maybe thats why I can do that.

For the sake of the engine, its not a good idea to over fuel like that. "Rolling coal" will actually make it possible for raw fuel to reach the cylinder walls and rings. More carbon soot will also contaminate the engine oil.

If you keep your foot out of it, then I guess you should be safe and get similar fuel economy, but at the end of the day, you are still dumping the same amount of fuel into the engine.
__________________
1986 F250HD Ex cab Fresh built up 6.9L diesel, Lariat AC leather seats power everything w/full cluster, sterling rear 3.08LS gears, E4OD trans, ram intake ATS 088 turbo


1986 F150 Ex cab Lariat rollercam 5.0L on LPG AOD trans 3.55 gears 390 000Ks
Reply With Quote
  #3  
Old 08-12-2009, 02:31 PM
84 f250 6.9's Avatar
84 f250 6.9 84 f250 6.9 is offline
Posting Guru
 
Join Date: Nov 2008
Posts: 1,190
84 f250 6.9 is starting off with a positive reputation.
all good points .. will I get a lil more get up and go if I turn it up .5 -1 flats?
__________________
1984 f250 6.9 idi diesel 4x4 with a borg warner t19 4 speed manual with a granny gear, 7.5" western unimount plow... ROLLIN' COAL!
'96 F350 crew cab XLT dually 2wd alcoa wheels 7.3 PSD E4OD ,300,000 miles+

64,999,987 firearms owners killed noone yesterday. protect our second amendment
Reply With Quote
  #4  
Old 08-12-2009, 02:40 PM
joe f350 joe f350 is offline
Post Fiend
 
Join Date: Oct 2008
Location: concord ca
Posts: 8,514
joe f350 has a good reputation on FTE.joe f350 has a good reputation on FTE.joe f350 has a good reputation on FTE.
maybe do u have a ram air if u dont that might still be to much fuel
Reply With Quote
  #5  
Old 08-12-2009, 03:33 PM
David85's Avatar
David85 David85 is offline
Post Fiend
 
Join Date: Nov 2003
Location: Campbell River, B.C.
Posts: 6,900
David85 has a good reputation on FTE.David85 has a good reputation on FTE.
Quote:
Originally Posted by 84 f250 6.9 View Post
all good points .. will I get a lil more get up and go if I turn it up .5 -1 flats?
Generally diesels will make more power the more fuel you dump into them even if much of it is turning to black smoke (enough fuel will stall them, but these fuel systems can't pump that much).

In terms of power, yes, you will get more power the more you turn up the fuel. But after you pass the black smoke thresh hold, the gains in power drop off and EGTs become an increasing problem.

Best you could hope for is to roll the coal as a brief boost of power when ever you needed it, but you couldn't use it to climb long hills because of rapid EGT rise.

I tired this when my truck was N/A and even bottomed out the screw once. The truck had much more sensitive power responce off idle, but I found myself afraid to go all the way to the floor because of all the smoke it would throw. Eventually turned it back down close to stock settings untill I found a turbo. Yes, it did hurt fuel economy, by about 2 MPG on average. Driving style might be able to compensate for that.
__________________
1986 F250HD Ex cab Fresh built up 6.9L diesel, Lariat AC leather seats power everything w/full cluster, sterling rear 3.08LS gears, E4OD trans, ram intake ATS 088 turbo


1986 F150 Ex cab Lariat rollercam 5.0L on LPG AOD trans 3.55 gears 390 000Ks
Reply With Quote
  #6  
Old 08-12-2009, 03:39 PM
84 f250 6.9's Avatar
84 f250 6.9 84 f250 6.9 is offline
Posting Guru
 
Join Date: Nov 2008
Posts: 1,190
84 f250 6.9 is starting off with a positive reputation.
alright i think im def gonna mess around with it
__________________
1984 f250 6.9 idi diesel 4x4 with a borg warner t19 4 speed manual with a granny gear, 7.5" western unimount plow... ROLLIN' COAL!
'96 F350 crew cab XLT dually 2wd alcoa wheels 7.3 PSD E4OD ,300,000 miles+

64,999,987 firearms owners killed noone yesterday. protect our second amendment
Reply With Quote
  #7  
Old 08-12-2009, 03:43 PM
joe f350 joe f350 is offline
Post Fiend
 
Join Date: Oct 2008
Location: concord ca
Posts: 8,514
joe f350 has a good reputation on FTE.joe f350 has a good reputation on FTE.joe f350 has a good reputation on FTE.
be carefully and get a pryometer cause i dont want to here u melt ur piston in that perdy truck
Reply With Quote
  #8  
Old 08-12-2009, 05:51 PM
84 f250 6.9's Avatar
84 f250 6.9 84 f250 6.9 is offline
Posting Guru
 
Join Date: Nov 2008
Posts: 1,190
84 f250 6.9 is starting off with a positive reputation.
alright so i took the triangle cover off i have my handy mirror and a light should this hex screw be visible like dead center of the opening? cuz so far i cant see it how do i get this screw visible?
__________________
1984 f250 6.9 idi diesel 4x4 with a borg warner t19 4 speed manual with a granny gear, 7.5" western unimount plow... ROLLIN' COAL!
'96 F350 crew cab XLT dually 2wd alcoa wheels 7.3 PSD E4OD ,300,000 miles+

64,999,987 firearms owners killed noone yesterday. protect our second amendment
Reply With Quote
  #9  
Old 08-12-2009, 06:08 PM
Mat J Mat J is offline
Senior User
 
Join Date: Mar 2008
Location: Jupiter
Posts: 368
Mat J is starting off with a positive reputation.
bump the engine over or turn it with a breaker bar, I THINK it needs to be around tdc but I cant remember.

If you invest in a good pyro it would be alot safer to drive. These pumps can put out enough fuel to melt pistons before turned up or so iv heard on here. Really you should atleast set up a ram air it is really cheap to do.
__________________
00 F-350 7.3 SRW CC LB 4x4 BTS, 10" fabtech lift 41"super swamper iroks, superchipped, 6637, Mbrp 4" dual stainless
Reply With Quote
  #10  
Old 08-12-2009, 06:20 PM
84 f250 6.9's Avatar
84 f250 6.9 84 f250 6.9 is offline
Posting Guru
 
Join Date: Nov 2008
Posts: 1,190
84 f250 6.9 is starting off with a positive reputation.
ill be doing the ram air thing .. i dont wanna get crazy with this fuel thing just a lil more
__________________
1984 f250 6.9 idi diesel 4x4 with a borg warner t19 4 speed manual with a granny gear, 7.5" western unimount plow... ROLLIN' COAL!
'96 F350 crew cab XLT dually 2wd alcoa wheels 7.3 PSD E4OD ,300,000 miles+

64,999,987 firearms owners killed noone yesterday. protect our second amendment
Reply With Quote
  #11  
Old 08-12-2009, 06:39 PM
joe f350 joe f350 is offline
Post Fiend
 
Join Date: Oct 2008
Location: concord ca
Posts: 8,514
joe f350 has a good reputation on FTE.joe f350 has a good reputation on FTE.joe f350 has a good reputation on FTE.
that good u dont want a big bowl of hot pistion soup
Reply With Quote
  #12  
Old 08-13-2009, 11:15 AM
jedstamm jedstamm is offline
Junior User
 
Join Date: Aug 2009
Posts: 60
jedstamm is starting off with a positive reputation.
From my experience, turning up the pump does very little because you don't have a turbo. In the old mechanicals on truck engines, it was easy to get extra hp by turning up the mechanical pump and putting larger injectors and turbos on the engine. With no turbo, it makes it pretty hard to bump the hp on a diesel engine much. Most people that left their IDI's stock but wanted more power just decreased their tire size.
Reply With Quote
  #13  
Old 08-13-2009, 11:37 AM
84 f250 6.9's Avatar
84 f250 6.9 84 f250 6.9 is offline
Posting Guru
 
Join Date: Nov 2008
Posts: 1,190
84 f250 6.9 is starting off with a positive reputation.
yeah i already gave up on it lol couldnt figure out how to get my tdc
__________________
1984 f250 6.9 idi diesel 4x4 with a borg warner t19 4 speed manual with a granny gear, 7.5" western unimount plow... ROLLIN' COAL!
'96 F350 crew cab XLT dually 2wd alcoa wheels 7.3 PSD E4OD ,300,000 miles+

64,999,987 firearms owners killed noone yesterday. protect our second amendment
Reply With Quote
  #14  
Old 08-13-2009, 12:03 PM
Sycostang67's Avatar
Sycostang67 Sycostang67 is offline
Post Fiend
 
Join Date: Dec 2002
Location: Kuna ID
Posts: 5,430
Sycostang67 has a very good reputation on FTE.Sycostang67 has a very good reputation on FTE.Sycostang67 has a very good reputation on FTE.
I had to rotate my engine with a breaker bar until the timing mark on the dampener was at the one o' clock postion(facing the front of the truck). You may have to do it twice. The screw is really hard to see, I actually turned my motor over 3 times before I realized it was further back in the pump than I thought. I used a small mirror and a single LED flashlight to see the dang thing. I turned my truck up 2 flats, it has a little more kick, EGT's were hardly affected(normal driving anyhow), and I only blow a little smoke under heavy acceleration. I blow a little more when pulling a load.
__________________
http://www.ford-trucks.com/user_gallery/tmp/159/159207.520.390
1993 F-250 HD XLT Lariat SC 4X4 7.3/5spd ATS WG turbo @ 12psi, 3" DP 4" straight exhaust, 5" stacks, Hypermax cowl induction with inline filter, IP up 3 flats, DPS stage 1 injectors, GPR LED mod, SMF conversion, coolant filter, catch can, Pyro/Boost gauges.
1986 F-250HD XLT Lariat 4X4 6.9/T19, soup bowl mod, straight pipe.
Reply With Quote
  #15  
Old 08-13-2009, 12:48 PM
jedstamm jedstamm is offline
Junior User
 
Join Date: Aug 2009
Posts: 60
jedstamm is starting off with a positive reputation.
Quote:
Originally Posted by 84 f250 6.9 View Post
yeah i already gave up on it lol couldnt figure out how to get my tdc
Here's the shade tree way to get to tdc. Take the glow plug out of cylinder 1. Put a piece of light weight plastic or something in it or on top of it. With a breaker bar, rotate the engine until the plastic gets blown off. Once the plastic blows off, line up the timing marks with the dampner pulley.

For finding the allen head on the screw, the easiest way is to find someone to rotate the engine with a breaker bar while you get up top with a flashlight and mirror. Once the allen head shows itself, have your buddy stop rotating the engine.
Reply With Quote
Old 08-13-2009, 12:48 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
5'' Rough Country vs. 6" Zone lift kit Broncofever89 Excursion - King of SUVs 12 03-22-2013 08:20 PM
Turnin the fuel up 6.9 diesel nut Pre-Power Stroke Diesel (7.3L IDI & 6.9L) 17 09-07-2012 02:11 PM
6.9 needs to rings but I dont know what all i need to buy seancrawford14 Pre-Power Stroke Diesel (7.3L IDI & 6.9L) 26 03-13-2012 09:16 AM
ford 6.9 performance 401477534 Pre-Power Stroke Diesel (7.3L IDI & 6.9L) 1 02-08-2011 09:32 AM
6.9l farmstud Pre-Power Stroke Diesel (7.3L IDI & 6.9L) 2 12-07-2005 08:49 PM


Go Back   Ford Truck Enthusiasts Forums > Diesel > Pre-Power Stroke Diesel (7.3L IDI & 6.9L)

Tags
69l, 73, 88, big, borg, diesel, ford, fuel, idi, screws, t19, trucks, turn, turnin, warner

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 01:08 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
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. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup