Diesel Newb Questions
#1
Registered User
Thread Starter
Join Date: Feb 2007
Location: Lake Havasu City, AZ
Posts: 72
Likes: 0
Received 0 Likes
on
0 Posts
Diesel Newb Questions
First off I would like to say that this is a very informative site and I'm glad that I found it. Here's the deal, I just bought a '91 W250 CTD 5-Speed and I'm lookin to fix it up to tow with. It's going to be transporting atleast a couple of trucks, some quads, and a camper most of the time, I want to know what I can do to improve power so that I can tow all this and still do the speed limit (60-70mph) and possibly make the guys in the newer trucks look bad. I've been looking at alot of posts on here and have been getting alot of good ideas, but I still don't have a very clear picture. I have advanced the pump timing and installed a later waste-gated turbine housing, but neither of these has given it much more power. I already know that it needs the governor increased, as it stops revving almost instantly as soon as you shift and I got to put a brake on it to help slow it down. I got the money to spend just need to know what to do with it, thanks in advance.
#2
Registered User
Welcome To The Site
Your truck should jerk the tongue plumb out of the wagon with no more load than you described.
Fresh fuel filters and air-filters will make a world of difference.
Those much smarter than me will be along to relieve you of some of your financial burden.
Fresh fuel filters and air-filters will make a world of difference.
Those much smarter than me will be along to relieve you of some of your financial burden.
#4
Registered User
Join Date: May 2006
Location: Joplin MO
Posts: 181
Likes: 0
Received 0 Likes
on
0 Posts
First off Welcome aboard, your financial situation will decrease dramatically the more you read!
Next, just a few questions.
1. By how much did you advance the pump timing?
2. What size turbo housing did you switch to?
3. I doubt its a problem, but do you know at what PSI your waste gate is set?
4. Is your truck intercooled or not? If I remember right it was mid year 91 they made the switch.
And from what I understand I think you're on the right path with the Governor spring idea. Once that and a couple more free mods are done, embarrassing the newer trucks shouldn't be a problem!
Good luck man!
#5
Registered User
Thread Starter
Join Date: Feb 2007
Location: Lake Havasu City, AZ
Posts: 72
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the welcome, to answer your questions
1. I advanced the pump timing until the pump hit the intake (I was told that that is about .5 to 1 degree).
2. I don't know the exact size of the turbo housing, I was told by my uncle (who gave it to me) that it is from a later, 2nd gen. truck.
3. I have no idea what the waste gate is set at, I assume that it is whatever stock was for the 2nd gen. trucks.
4. The truck is not intercooled, I read on here though that the intercooler from a 7.3 Ford Powerstroke will fit nicely, so I might try that at some point.
I have changed the fuel and air filters and I'm in the process of adding boost and egt gauges. One more thing that I wanted to ask about is how do you disable the clutch switch on the pedel?, that thing is driving me crazy. Thanks for all the help.
1. I advanced the pump timing until the pump hit the intake (I was told that that is about .5 to 1 degree).
2. I don't know the exact size of the turbo housing, I was told by my uncle (who gave it to me) that it is from a later, 2nd gen. truck.
3. I have no idea what the waste gate is set at, I assume that it is whatever stock was for the 2nd gen. trucks.
4. The truck is not intercooled, I read on here though that the intercooler from a 7.3 Ford Powerstroke will fit nicely, so I might try that at some point.
I have changed the fuel and air filters and I'm in the process of adding boost and egt gauges. One more thing that I wanted to ask about is how do you disable the clutch switch on the pedel?, that thing is driving me crazy. Thanks for all the help.
#6
Adminstrator-ess
Check the throttle linkage for full travel, this is the cause of a lot of low power complaints.
Unplug the clutch switch and make a jumper wire for the plug - but for God's sake be careful!
Unplug the clutch switch and make a jumper wire for the plug - but for God's sake be careful!
#7
Registered User
Join Date: Oct 2006
Location: Indianapolis, Indianna
Posts: 701
Likes: 0
Received 0 Likes
on
0 Posts
Back your timing down to stock (should be marked) then advance till it rattles loud (about 1/16 - 1/8) till it hits the head is way to much!!
1/16 worked great on my 91.5.
1/16 worked great on my 91.5.
Trending Topics
#8
Registered User
Thread Starter
Join Date: Feb 2007
Location: Lake Havasu City, AZ
Posts: 72
Likes: 0
Received 0 Likes
on
0 Posts
I did only move it about an 1/8", it wouldn't move anymore than that because the boost line would hit the intake and I didn't want that. It seemed like it gave it alittle more power but not much. I will check the throttle linkage to see if it's getting full throttle. Thanks again for the input.
#9
Banned
Join Date: Jan 2004
Location: Cape Girardeau MO
Posts: 1,205
Likes: 0
Received 0 Likes
on
0 Posts
Timing alone will give you a little shot in the rear, but not much more than that. It may have already been advanced, it's hard to tell on a 16year old truck.
Read the stickies, and play with your AFc settings, then maybe a turn or two of your power screw. Since you're non intercooled, gauges are a must. You DID get a 40psi or higher gauge, didnt you? If not, swap it out for one. I pegged the 40psi gauge in my early 91 quite regularly with pump tweaks (stock internals, even), and PDR HX35-18. The 12cm housing may or may not be too restrictive. It was on mine for my use and liking. Keep an eye on temps and pressures.
An intercooler is a good idea. I think your stock injectors will flow adequately for your needs.
Daniel
Read the stickies, and play with your AFc settings, then maybe a turn or two of your power screw. Since you're non intercooled, gauges are a must. You DID get a 40psi or higher gauge, didnt you? If not, swap it out for one. I pegged the 40psi gauge in my early 91 quite regularly with pump tweaks (stock internals, even), and PDR HX35-18. The 12cm housing may or may not be too restrictive. It was on mine for my use and liking. Keep an eye on temps and pressures.
An intercooler is a good idea. I think your stock injectors will flow adequately for your needs.
Daniel
#10
Registered User
Change your intake and exhaust. Lots of guys here don't like the K&N but I do. I think that people just clean them too often and over oil them and that's what lets particles through and gums up the turbo. I cut the top off my air box because the little opening in the front is a joke and it made a big difference. A 4" turbo back exhaust will wake it right up. You can try to buy one or do what I did and build it. As already stated, follow the instructions for pump adjustments and you won't be disappointed. I don't have a 5 speed so I don't know what the clutch will hold but be careful and plan on upgrading.
Thread
Thread Starter
Forum
Replies
Last Post