cummins vs. psd - Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 13 Old 06-01-2008, 05:21 PM Thread Starter
Compression Ignition Addict
 
1995psd's Avatar
 
Join Date: Mar 2008
Location: nicholasville ky.
Posts: 2,137
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
cummins vs. psd

well i have heard in the past that on a cummins you can do alot of things to the engine for free and get easly 350 hp. for free. can you do any kind of these things you can do to a obs psd. for free?

something like turn up the fuel pump
1995psd is offline  
post #2 of 13 Old 06-01-2008, 05:29 PM
Compression Ignition Addict
 
BryanH's Avatar
 
Join Date: Nov 2007
Location: San Antonio
Posts: 3,196
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Well does a 95 PSD have an ECM?.

546K 7.3L Hauler>>
Central Texas Hotshots
BryanH is offline  
post #3 of 13 Old 06-01-2008, 05:34 PM Thread Starter
Compression Ignition Addict
 
1995psd's Avatar
 
Join Date: Mar 2008
Location: nicholasville ky.
Posts: 2,137
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
ECM? what exactly is that?
1995psd is offline  
post #4 of 13 Old 06-01-2008, 05:39 PM
Compression Ignition Addict
 
BryanH's Avatar
 
Join Date: Nov 2007
Location: San Antonio
Posts: 3,196
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
It's a small computer that operates everything. Older 12v's did not, That is why you could manually turn up boost and fuel supply. I am in no means a 7.3L expert, But if everything is manual, Then yes it will be cheap to produce a little more power. If anything this will be a BUMP for the guy's who know these trucks.

546K 7.3L Hauler>>
Central Texas Hotshots
BryanH is offline  
post #5 of 13 Old 06-01-2008, 05:41 PM Thread Starter
Compression Ignition Addict
 
1995psd's Avatar
 
Join Date: Mar 2008
Location: nicholasville ky.
Posts: 2,137
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by BryanH View Post
It's a small computer that operates everything. Older 12v's did not, That is why you could manually turn up boost and fuel supply. I am in no means a 7.3L expert, But if everything is manual, Then yes it will be cheap to produce a little more power. If anything this will be a BUMP for the guy's who know these trucks.

bump!!!
1995psd is offline  
post #6 of 13 Old 06-01-2008, 06:05 PM
Compression Ignition Addict
 
French_Toast's Avatar
 
Join Date: Aug 2007
Location: Nova Scotia, Canada
Posts: 182
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Nope, even the OBS Powerstrokes are computer controlled so you cant turn up fuel pump. Only thing i know of thats "free" would be the FPR shim, but that just really smooths out idle and makes sure the engine is getting adequate fuel pressure and as such isn't a "big power" mod.

1996 F250 XLT
Build date 09/95

Regular Cab Automatic 4x4
Fey, Rear 10,000lb Stainless Bumper
S&B Intake
4inch Custom Exhaust with MBRP Downpipe and Muffler.
French_Toast is offline  
post #7 of 13 Old 06-01-2008, 06:07 PM
Compression Ignition Addict
 
BryanH's Avatar
 
Join Date: Nov 2007
Location: San Antonio
Posts: 3,196
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by French_Toast View Post
Nope, even the OBS Powerstrokes are computer controlled so you cant turn up fuel pump. Only thing i know of thats "free" would be the FPR shim, but that just really smooths out idle and makes sure the engine is getting adequate fuel pressure and as such isn't a "big power" mod.
Well here ya go, You found your man.

546K 7.3L Hauler>>
Central Texas Hotshots
BryanH is offline  
post #8 of 13 Old 06-01-2008, 06:17 PM
Compression Ignition Addict
 
Black Pwrstroke's Avatar
 
Join Date: Sep 2007
Location: Kearney Nebraska
Posts: 2,082
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
you can only do free mods to the 12valve not the 24v.

24v that drinks like a 12v
Black Pwrstroke is offline  
post #9 of 13 Old 06-01-2008, 07:52 PM
Electrical Ogre
 
alberta 7.3's Avatar
 
Join Date: Aug 2007
Location: Calgary, Alberta
Posts: 12,116
Thanks: 30
Thanked 79 Times in 76 Posts
Mentioned: 1 Post(s)
Quoted: 97 Post(s)
Feedback Score: 1 reviews
Even with the 12 valve cummins, you can't hit 350 HP by just "turning up the screws"
Turbine housing, injectors, fuel pin, pump adjustments, exhaust and a high-flow air filter will get the old cummins to around 300 HP. Diesel Power magazine "Project Rustbucket" for reference.

As far as the 7.3, the 10K (or 18K?) resistor mod for the IPR, FPR shim (as previously mentioned,) IDM resistor mod, and DIY air intake. These will make only slight improvements to power output. To really get increased power, you will need a tuner, or chip. If you get a tuner/chip, BUY GAUGES!!! since you will need to monitor EGT and prevent cooking your engine, especially when hauling heavy loads.

Bill

1996 F250 SC/SB 4X4 XLT
1997 F250 RC/SB 2WD project
2008 F350 CC/LB 4X4 DRW Lariat, 3" cow catcher mod
2008 Ranger SC FX4
Quote:
Originally Posted by weareweird69 View Post
If your posting pictures bill, everyone dim their screens, that CAT YELLOW is bright
Quote:
Originally Posted by Fordman247365 View Post
Is there anything you DONT take apart and **** with?
Quote:
Originally Posted by JJFLASH View Post
I still say that those Dodge mirrors have as much business on a OBS Ford as yoga pants have on a fat chick...my .02
alberta 7.3 is offline  
post #10 of 13 Old 06-01-2008, 08:21 PM
Compression Ignition Addict
 
Join Date: Jan 2008
Posts: 951
Thanks: 1
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by alberta 7.3 View Post
Even with the 12 valve cummins, you can't hit 350 HP by just "turning up the screws"
Turbine housing, injectors, fuel pin, pump adjustments, exhaust and a high-flow air filter will get the old cummins to around 300 HP. Diesel Power magazine "Project Rustbucket" for reference.

As far as the 7.3, the 10K (or 18K?) resistor mod for the IPR, FPR shim (as previously mentioned,) IDM resistor mod, and DIY air intake. These will make only slight improvements to power output. To really get increased power, you will need a tuner, or chip. If you get a tuner/chip, BUY GAUGES!!! since you will need to monitor EGT and prevent cooking your engine, especially when hauling heavy loads.
I'd have to go back and look at that article but it sounds like it is in reference to a 1st gen Cummins which had the VE pump. The 2nd gen Cummins was still a 12 valve and still machanical but it has a P pump. You can get a lot more with them without spending much money than you can with the VE pump and most likely can get the 350hp or close to it. The fuel plate in itself is quite an improvment and if you know what you are doing you can grind the stock one in such a way that you can get quite a bit more fuel out of the pump.

However as stated the only mods you can really do on the PSDs are the 10K mod which increases the injection control pressure and helps inject more fuel. On the '94-'97 trucks it really doesn't do much. Or the fuel pressure regulator which really doesn't do much. From my experience more fuel pressure makes for a worse idle and many have complained of worse fuel economy from it as well if you shim it up to much.

To really get gains you need more fuel in the way of a programmer. The intake and exhaust mods won't give you any more power either but will help keep your exhaust gas temps down and help the air flow through the engine. Once you get a programmer the bottle neck is the injectors. The 90cc stock injectors just don't flow enough fuel to really make a lot of power but with a chip will be significanly better than stock. The Superdutys have 135cc or 140cc injectors depending on what year. So a chip makes a lot bigger difference and they make stock about what a '94-'97 makes with a chip.
gtspowerstroke is offline  
Reply

Quick Reply
Message:
Options

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

Password:


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

Email Address:
OR

Log-in









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