7.3 IDI vs. Power Stroke
Thread Starter
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Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
7.3 IDI vs. Power Stroke
Hi All,
New to the 6.9/7.3IDI and am wondering what the differences between the IDI and Power Stroke are?.
I recently picked up a 86 F250 SuperCab Dually Longbed 4WD 6.9 4spd with 3.55's that is Rust/Rot Free and we are going to resto-mod it to pull our toys... Race cars in the summer and Snow toys in the winter.
I've have a 91 F250 7.3IDI 5spd with 4.10's as well but DOT refuses to sticker it do to excessive chassis rust/rot not to mention the cab and bed. (It is REAL BAD!)
I've been thinking on putting the 7.3 and 5spd in the 86 and adding a Banks Sidewinder, Should I, Or should I find a Power Stoke instead.
The 7.3 has in excess of 300,000 Miles with a KNOWN HISTORY and is SOLID!, the 6.9 is a Jasper Reman that I know nadda about. I plan on contacting Jasper and finding out when it was remaned.
Thanks All
-Enjoy
fh : )_~
New to the 6.9/7.3IDI and am wondering what the differences between the IDI and Power Stroke are?.
I recently picked up a 86 F250 SuperCab Dually Longbed 4WD 6.9 4spd with 3.55's that is Rust/Rot Free and we are going to resto-mod it to pull our toys... Race cars in the summer and Snow toys in the winter.
I've have a 91 F250 7.3IDI 5spd with 4.10's as well but DOT refuses to sticker it do to excessive chassis rust/rot not to mention the cab and bed. (It is REAL BAD!)
I've been thinking on putting the 7.3 and 5spd in the 86 and adding a Banks Sidewinder, Should I, Or should I find a Power Stoke instead.
The 7.3 has in excess of 300,000 Miles with a KNOWN HISTORY and is SOLID!, the 6.9 is a Jasper Reman that I know nadda about. I plan on contacting Jasper and finding out when it was remaned.
Thanks All
-Enjoy
fh : )_~
Cargo Master
Joined: Mar 2006
Posts: 2,789
Likes: 5
From: Sand GAp, KY
SAme here on the jasper thing. But in MHO the IDI's are the better motors. They are alot simpilar to wotk on (no electronics). If you want alot more detailed info on the IDI's go to the 6.9 7.3 IDI forum, there are a lot of very knowledgeable people there that can give much more info.
Cargo Master
Joined: Nov 2003
Posts: 2,585
Likes: 1
From: Duluth, Mn.
It depends on what kind of truck Your looking to build. IDI's are dependable and inexpensive to repair and maintain. But are not Power Houses. The PSD will make a bunch more power, but will be more expensive to repair/maintain.
Thread Starter
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Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
It'll pretty much be a road truck pulling a 38' goose neck.
I do want to build the motor, Not sure of the HP/TQ goal yet, I suspect ~400hp/1000FtLbs if it can take it. (I'll ask the IDI forum for these Q's)
I really don't want the electronics either, but I need more power, both the 87 (6.9) and the 91 (7.3) Choke on molehill's with two stock cars, tools and spares.
We are a bit off topic though ... My OPQ was "What are the differences between the IDI and Power Stroke"
For example: are the 7.3IDI and the 7.3PSD blocks/cranks/heads/valve train ... etc. the same. I know the PSD is electronic and turbo'd, but what other differences are there.
Thanks everyone.
-Enjoy
fh : )_~
Senior User
Joined: Apr 2005
Posts: 466
Likes: 0
The basic difference is the IDI is indirect injected (injector behind intake valve). The powerstroke is direct injected (injection direct into the combustion chamber). The IDI has small cheap reliable mechanical injectors. The powerstroke has larger, expensive, oil fired injectors. The IDI is all mechanical, while the powerstoke is computer controlled.
I used to own a '93 factory turbo'd 7.3 IDI w/5speed, 4.10 gears (now owned by my son). The factory turbo system was a detuned ATS system. I changed the waste gate and exhaust. Bumper the mechanical pump timing up a few degrees, made a huge difference in power.
With the mods, it pulled a 14k fifthwheel quite well. I just hoped the trailer brakes never failed, as the truck braking with the trailer was marginal.
Good luck
I used to own a '93 factory turbo'd 7.3 IDI w/5speed, 4.10 gears (now owned by my son). The factory turbo system was a detuned ATS system. I changed the waste gate and exhaust. Bumper the mechanical pump timing up a few degrees, made a huge difference in power.
With the mods, it pulled a 14k fifthwheel quite well. I just hoped the trailer brakes never failed, as the truck braking with the trailer was marginal.
Good luck
Cargo Master
Joined: Nov 2003
Posts: 2,585
Likes: 1
From: Duluth, Mn.
C.F. nailed it.
Also, the IDI/PSD are completely different motors, and nothing exchanges between them.
If Your truly looking for 1000 Ft Lb's, Your going to have to mod up a PSD. $$$
Also, the IDI/PSD are completely different motors, and nothing exchanges between them.
If Your truly looking for 1000 Ft Lb's, Your going to have to mod up a PSD. $$$
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Postmaster
Joined: Jun 2007
Posts: 2,621
Likes: 1
From: Sweetwater Texas
Yupp as everyone else has mentioned, nothing is the same in a Powerstroke or an IDI, well except they have the same bellhousing pattern.
A cool factor of the IDI is you can completely rebuild it for cheaper than what it costs to replace all 8 of the injectors on a Powerstroke.
If your serious about the IDI, then visit our forum and ask about our Mod's amazing 6.9 that could do what you are needing twice over.
A cool factor of the IDI is you can completely rebuild it for cheaper than what it costs to replace all 8 of the injectors on a Powerstroke.
If your serious about the IDI, then visit our forum and ask about our Mod's amazing 6.9 that could do what you are needing twice over.
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Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
Yupp as everyone else has mentioned, nothing is the same in a Powerstroke or an IDI, well except they have the same bellhousing pattern.
A cool factor of the IDI is you can completely rebuild it for cheaper than what it costs to replace all 8 of the injectors on a Powerstroke.
If your serious about the IDI, then visit our forum and ask about our Mod's amazing 6.9 that could do what you are needing twice over.
A cool factor of the IDI is you can completely rebuild it for cheaper than what it costs to replace all 8 of the injectors on a Powerstroke.
If your serious about the IDI, then visit our forum and ask about our Mod's amazing 6.9 that could do what you are needing twice over.
Enter DIY-Injectors.com
Sorry I couldn't resist.
The PSD is electronic but don't let that scare you. With a $250 Aeroforce Scangauge or Auto enginuity for a computer you can pull codes and do a Buzz test and contribution test as well as monitor live data from the PCM. With that info at your hands and the help of the OBS PSD forum you can fix anything you have the tools to do. Pretty much if you feel comfortable doing any work on an IDI you can do it on a PSD.
The PSD is really quite simple once you understand the system. And the power potential is pretty darn good too. The 7.3 is an old engine but there are still new parts and mods coming out for it all the time and many people pushing its limits and rebuilding to keep making more power. More than you ever need in a daily driver.
BTW 400hp is not a cheap endeaver no matter which engine you choose and it is way more than enough to pull your trailer!
To swap in a PSD you will pretty much need a donor truck with all the wiring, dash, transmission (unless you are using a ZF) and the PCM and IDM.
Thread Starter
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Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Originally Posted by fonefiddy
If Your truly looking for 1000 Ft Lb's, Your going to have to mod up a PSD. $$$
Originally Posted by tjbeggs
The PSD is electronic but don't let that scare you.
Originally Posted by fonefiddy
An IDI NEEDs a Turbo for real power. New kits are in the $2K range.
Thanks folks for the input.
-Enjoy
fh : )_~
Thread Starter
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Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
If he wants to help me out, I would not refuse, But I am not going to search him out just to _use_ him for a discounted purchase! Not my style!
-Enjoy
fh : )_~
Postmaster
Joined: Jun 2007
Posts: 2,621
Likes: 1
From: Sweetwater Texas
No its his job, he's a marketing guy or something, he's really helpful in tracking down parts, especially because Banks doesn't offer just a turbo kit, but instead a kit that has everything, so he can break down the kit and get prices.
His last name is Barker I think.
His last name is Barker I think.
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
Why not sell the trucks you have, take that money and the 2K a IDI turbo setup will cost (if thats the going rate) and buy a PSD. Shoot with the money from both trucks and 2K on top you could get your hands on a Super Duty. I am all about the OBS but you have less upgrades needed on a SD to get the power. They have larger injectors and an intercooler.