How many amps does 7.3l use? - Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 18 Old 01-14-2013, 03:25 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Dec 2012
Location: some where in the middle?
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
How many amps does 7.3l use?

Hello,

I wanted to know how many amps a 7.3l 2000 ford uses when at idle and at cruising speed. With all lights on i.e. tail lights, headlights, cluster, radio/music and heater/air. I believe a stock alternator at max amps uses 150 amps. I did a Google search and also looked in our forum but mostly it was about glow plugs and if alternator was going bad. Second question is will it be bad or harmful to the truck to install an alternator that goes up to 300 amps i.e. does it over charge the battery cause overheating or any problems to the current wiring setup in the truck. Thanks for reading and your knowledge.

Questions

1: how many amps does a 2000 7.3l use when at idle and at cruising speed 2200 rpms +/- a few hundred rpms.
2: will it be bad or harmful to the truck to install an alternator that goes up to 300 amps.
dingo1990 is offline  
post #2 of 18 Old 01-14-2013, 05:17 AM
Compression Ignition Addict
 
jesilvas's Avatar
 
Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,148
Thanks: 0
Thanked 27 Times in 25 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
If you don't upgrade wiring, 300A would be bad.
But alternators are designed to not overcharge

I made my Samsung SGH-I997 send this.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
jesilvas is offline  
post #3 of 18 Old 01-14-2013, 06:19 AM
Compression Ignition Addict
 
Join Date: Dec 2007
Posts: 6,234
Thanks: 7
Thanked 237 Times in 228 Posts
Mentioned: 6 Post(s)
Quoted: 83 Post(s)
Feedback Score: 3 reviews
Remember though, it doesn't matter what the maximum output the Alt is capable of, it's what the system "needs" that's going to determine how many amps it Alt will be producing.

300A doesn't mean it's putting that out all the time...

With just the engine running the draw from the electrical system is pretty low and, because we have dual batteries to support the Glow Plug system while cranking over the, high compression motor, there's a tremendous reserve available. Charging those batteries back up normally wouldn't require anything like 300Amps.

When the GPs are ON, there's close to a 200A load, add at least that much more for the starter, but the Alternator isn't activated during those periods and those high loads are only temporary.

Lights, amps, and other aftermarket accessories are the biggest reason to upgrade the Alt, but stock I doubt you'd ever ask the new one to put out anywhere near the 300A. I wouldn't worry about it...
NoRalPh is offline  
post #4 of 18 Old 01-14-2013, 06:20 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Dec 2012
Location: some where in the middle?
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Ok I see that a 4 gauge wire is well suited for this. Should I do just alternator wiring or battery as well.

Thank you!
dingo1990 is offline  
post #5 of 18 Old 01-15-2013, 03:04 AM
Compression Ignition Addict
 
jesilvas's Avatar
 
Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,148
Thanks: 0
Thanked 27 Times in 25 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by dingo1990 View Post
Ok I see that a 4 gauge wire is well suited for this. Should I do just alternator wiring or battery as well.

Thank you!
Like denton asked, what are you running for a 300A alt?

I made my Samsung SGH-I997 send this.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
jesilvas is offline  
post #6 of 18 Old 01-15-2013, 09:44 AM
Compression Ignition Addict
 
Join Date: May 2012
Location: Port Coquitlam, BC
Posts: 191
Thanks: 0
Thanked 4 Times in 4 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by jesilvas View Post
Like denton asked, what are you running for a 300A alt?

I made my Samsung SGH-I997 send this.

What he asked. Even with all accessories on, your factory electrical system will not require the maximum amperage the stock alternator can put out.
Greenman01 is offline  
post #7 of 18 Old 01-15-2013, 09:54 AM
Compression Ignition Addict
 
Join Date: Oct 2009
Location: hudson, fl
Posts: 3,179
Thanks: 10
Thanked 17 Times in 14 Posts
Mentioned: 0 Post(s)
Quoted: 3 Post(s)
Feedback Score: 1 reviews
serious audio visual components?


2000 DRW CC 7.3
Exterior: 08 Exterior Clone, 22.5's
Engine Mods: GTP38R WW2, 5 inch exhaust,T500, 6637, TW tunes,DI Up pipes, 6.7 fuel pump fuel system.
Trans Mods: 6.0 trans cooler, JW Valve body,Billet triple disc converter.
Sound Mods: 7" flip out tv, 3-way speakers all around, 12" sub, 500 watt amp.
Misc:dieselsite coolant filter, max ac assist, BRV, IHD,gauges, CCV

Next up power rear window
campbellflage is offline  
post #8 of 18 Old 01-15-2013, 10:18 AM
Powerstroke.org Rookie
 
Join Date: Nov 2012
Location: Virginia Beach
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
im wondering the same thing. im running some cb equipment in my truck. im also looking at a 300 amp alt. the amps that i run for my cb can really draw some amps.

99 7.3
757kevin is offline  
post #9 of 18 Old 01-15-2013, 08:47 PM
Compression Ignition Addict
 
Tj Krawler's Avatar
 
Join Date: May 2010
Location: Western New York
Posts: 958
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I believe the stock alt is around 110-120 amps.


Quote:
Originally Posted by 757kevin View Post
im wondering the same thing. im running some cb equipment in my truck. im also looking at a 300 amp alt. the amps that i run for my cb can really draw some amps.
I highly doubt you need a 300 amp alt. If you do, I would go with a factory dual alt setup. I've heard too many cases of the the high output alts failing. At least dual alts will get you home and you can get replacements at just about any parts store if one does go out when you're on the road.

Alan
2000 F-350 CC LB DRW 4x4 XLT Auto

- Intake
- Exhust
- ScanGauge
Tj Krawler is offline  
post #10 of 18 Old 01-16-2013, 06:24 PM
Serving Our Country!
 
7.3HeavyHauler's Avatar
 
Join Date: Jul 2010
Location: Indiana
Posts: 411
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
^^ i'd agree till i saw the video on youtube with that guy adding the 2nd alt, doesn't look fun at all and he's been having a problem finding the right belt, should the OP get a bigger alternator i would keep the one you have as a spare, should it fail easy to change, also with dual alt's you have to get the ecm reprogrammed for dual alt., pick and choose wisely daniel son

My avatar is my goal for the 7.3
7.3HeavyHauler 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