How To Modify The 7.3 IDI - 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.

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post #1 of 28 Old 12-23-2008, 03:37 PM Thread Starter
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How To Modify The 7.3 IDI

Ok, I know this questions been asked a billion times, but I just bought this truck yesterday. I've got a '93 F-250 XLT 4x4. These are the diesels that got me into diesels all together, but all I've ever done is repair them. I wasn't sure if there's a performance market for these IDIs or just some things I could do to make it run better, get better MPG, etc. Is there a way to tweak the injector pump like you can with the old Cummins VE pump? I know the things I need to look for maintenance stuff, but what can I do to this bad boy & get a little 'umph'?

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.

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post #2 of 28 Old 12-23-2008, 04:01 PM
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Turbo it! lol You can tweak the pump some but mostly all u will get is smoke they dont seem to run to much better. ATS Diesel builds a good turbo kit for that truck.

2001 F-350 Super Duty
S&B Cold Air Intake, MBRP 5" Exhaust 6" Tip
ATS E-Power Tuner Stacked With BANKS 6 Gun
Quad Pillar Mount, Pyro, Boost, Trans Temp, Fuel Pres
ITP Overboost Annihilator, ITP CCV Kit
Zoodad Mod, Foil Delete
Leveling Kit In The Front Add-A-Leaf In The Rear
35" Toyo Mud Terrains on 20" Atlas Wheels
Bradford Built Flatbed
Mama's 2000 PSD Excursion Limited


Coming Soon ATS Ported Compressor Housing. Banks Big Head Wastegate Acuator And Tranny Upgrades.
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post #3 of 28 Old 12-23-2008, 04:13 PM
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post #4 of 28 Old 12-23-2008, 05:08 PM
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Yes, you can advance the pump, but as you mentioned fuel mileage... advancing the pump will not get you that at all. As far as power? Turbo will go a long way on that bad boy. The idi will go a long way just towing, but she isn't much on performance.


unless...


You p-pump her, and run twins. I believe the 7.3 idi was the first in the 10's.

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post #5 of 28 Old 12-23-2008, 05:23 PM
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Quote:
Originally Posted by Dirk View Post
You p-pump her, and run twins. I believe the 7.3 idi was the first in the 10's.
I believe it was a cummins shop and used II pump and sticks.


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post #6 of 28 Old 12-23-2008, 05:35 PM Thread Starter
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Quote:
Originally Posted by SMOKESTROKE View Post
Turbo it! lol You can tweak the pump some but mostly all u will get is smoke they dont seem to run to much better. ATS Diesel builds a good turbo kit for that truck.
There's some cool stuff on most of this site! I didn't know there was so much stuff for the IDI! Thanks, guys.
Quote:
Originally Posted by Dirk View Post
Yes, you can advance the pump, but as you mentioned fuel mileage... advancing the pump will not get you that at all. As far as power? Turbo will go a long way on that bad boy. The idi will go a long way just towing, but she isn't much on performance.


unless...


You p-pump her, and run twins. I believe the 7.3 idi was the first in the 10's.
Looks like I'll have to look into a turbos, eventually. I need to spend the $$$ on Heavy 1st & get 'er running right. Your help was much appreciated, Dirk. I know now I really need that injector, I'm gonna buy NCH's CCV mod, & you already know about the CPS(or you said CMP?) & EBPS. Then before I get into any mods with the IDI(TANK), I've gotta take care of it's driveability problems. It rides like a spring mattress which I love, but the wife won't stifle about it. Powerwise it impressed me. It won't set any speed records, but it climbs hill like a champ!

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.

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post #7 of 28 Old 12-23-2008, 05:40 PM
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Your welcome! Good luck with the truck!

2001 F-350 Super Duty
S&B Cold Air Intake, MBRP 5" Exhaust 6" Tip
ATS E-Power Tuner Stacked With BANKS 6 Gun
Quad Pillar Mount, Pyro, Boost, Trans Temp, Fuel Pres
ITP Overboost Annihilator, ITP CCV Kit
Zoodad Mod, Foil Delete
Leveling Kit In The Front Add-A-Leaf In The Rear
35" Toyo Mud Terrains on 20" Atlas Wheels
Bradford Built Flatbed
Mama's 2000 PSD Excursion Limited


Coming Soon ATS Ported Compressor Housing. Banks Big Head Wastegate Acuator And Tranny Upgrades.
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post #8 of 28 Old 12-23-2008, 07:34 PM
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Quote:
Originally Posted by Dirk View Post
Yes, you can advance the pump, but as you mentioned fuel mileage... advancing the pump will not get you that at all. As far as power? Turbo will go a long way on that bad boy. The idi will go a long way just towing, but she isn't much on performance.


unless...


You p-pump her, and run twins. I believe the 7.3 idi was the first in the 10's.
Whats a P-Pump? and is there any info on this 10 sec. IDI?
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post #9 of 28 Old 12-23-2008, 07:59 PM
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I'm sorry. Not a 10sec idi, apparently it's in the 9's.

All credit goes to Saber123316

Apparently...

according to various sources Max Legold created the first 9 second diesel pickup out of a IDI 7.3 back in the early 90's.

so...

Putting my investigative work to the test I e-mailed Hypermax.

I got this:

Re: indirect injection 9 second diesel from the early 90's‏
From: info@gohypermax.com
Sent: December 5, 2008 4:44:29 PM
To: Jordan

We did build a coupleAll the info was given in the article it was an inline pump with 2 turbos Thanks

------Original Message------From:
Jordan Greenling
To: info@gohypermax.com
Sent: Dec 5, 2008 10:00 AM
Subject: indirect injection 9 second diesel from the early 90's

In a diesel world article it said that Max Legold (sorry if I don't have the correct spelling) built a hotrod Diesel truck that made huge power and did 9 second passes the engine was orginally ment for sled pulling but got banned and then became a drag racing vehicle. I just wanted to know if this was correct and if I could get information on it.

So it was P-pump twin turbo 7.3 IDI.

putting the investigative work a little further... I found pictures.


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post #10 of 28 Old 12-23-2008, 08:07 PM
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i was alos reading up on this truck awhile ago and what they did was took the 7.3l bock and sleeved it to a 6.9l to strengthen it


1999 F250 CC SB 4x4 4r100 ts chip w/ php tunes
1989 F350 CC LB 4X4 N/A 7.3l IDI zf5 swapped and rebuilt engine. sold
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