more power out of a 90 7.3 - Ford Powerstroke Diesel Forum
7.3L IDI (Non-Powerstroke) Diesels Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

LinkBack Thread Tools Display Modes
post #1 of 5 Old 04-29-2010, 06:02 PM Thread Starter Rookie
Join Date: Apr 2010
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
more power out of a 90 7.3

ive got a 90 7.3 f450 and would love to feel some power, it runs great but it cant get out of its own way. is there anything i can do besides putting a turbo on it?
vtxman is offline  
post #2 of 5 Old 05-04-2010, 08:49 PM
Compression Ignition Addict
tjmp111's Avatar
Join Date: Aug 2007
Location: Ellensburg WA
Posts: 162
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
have the pump checked, and if its good turn it up and advance the timing. But the best power is the turbo. My old 86 had a 6.9 in it with a banks kit on it and it would throw down 205 on the dyno.

tjmp111 is offline  
post #3 of 5 Old 05-07-2010, 01:51 PM
Compression Ignition Addict
zpd307's Avatar
Join Date: Mar 2010
Location: zumbrota, mn
Posts: 650
Thanks: 0
Thanked 3 Times in 3 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 2 reviews
turbo and fresh fuel injection system- pump and injectors. the guy that bought my 90 said his brothers factory turbo 94 was slower. and these arent powerhouses. btw, my 90 had a factory 94 turbo on it.

hello, my name is gary
new: 2008 f250 lariat 4x4 ccsb 6.4.....
sold,2011 f250 xlt 4x4 crewcab 6.2 shortbox 5 star tuned
sold,early, 09/98, 1999 f350 lariat 4x4 crewcab 7.3 dually
sold, 1990 f350 lariat 4x4 crewcab 7.3 longbox.
sold, 2003 f350 lariat 4x4 crewcab 6.0 longbox.
1987 we4 turbo buick
2008 taurus limited
zpd307 is offline  
post #4 of 5 Old 05-12-2010, 10:04 AM
Compression Ignition Addict
FordGuy100's Avatar
Join Date: Jun 2008
Location: Silverton, OR
Posts: 2,492
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
The factory turbo trucks werent made to put out much power, look at the downpipe, plus the fuel settings werent really messed with (when you add air, you need more fuel to go with it for more power).

If you dont want to turbo then do this. Fresh fuel system, new IP and injectors and return lines. Instal a pyrometer into the exhaust manifold to watch EGT's. Turn up the pump until you are satified with power, though watch that pyro or you will melt it down. Get the timing set properly. Do you own intake and take out the restrictive exhaust and either buy one or custom make one. 3-4" exhaust work good on a N/A motor. You can also mess with propane injection.

1985 Ford F-250 with a 6.9 IDI/T-19 4speed 4x4
Paint, Eagle Alloys, Kelly Safari TSR's, ATS turbo, gauges

2004 Jetta TDI 5 speed
2004 2wd Excursion Limited 6.0. Testing how loyal I am to Ford
1997 Passat B4V TDI. 1 of 80 imported in 97. 50 MPG and a factory 25 gallon fuel tank!
FordGuy100 is offline  
post #5 of 5 Old 05-15-2010, 01:59 PM
Compression Ignition Addict
dakotajeep's Avatar
Join Date: May 2010
Location: Bismarck, ND/Ft Riley, KS
Posts: 248
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
The answer for more seat of the pants power for an IDI without turbo is: Get a turbo. Other gains are going to be minimal for the price. There are a few out there that have gotten significant power gains from many mods but they may have just gone with a turbo for the amount of time and energy spent on other mods.

my .02


2003 F350 6.0 4x4 Crewcab Longbed SRW w/X Code Front Springs- 265/75R16's on it now. Still got the 285 retreads in the shed though.
Future modifications: Edge Insight CS, SCT X3 with Custom Tunes

1994 F350 7.3 Banks Turbo IDI 4x4 Crewcab Longbed-Miss you old girl
dakotajeep is offline  

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may 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

For the best viewing experience please update your browser to Google Chrome