Alternator SWAP: Dual vs Single S(top units) - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by bushpilot, this thread has received 15 replies and been viewed 12575 times.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 16 (permalink) Old 11-23-2010, 06:00 PM Thread Starter
Senior Member
 
bushpilot's Avatar
 
Join Date: Aug 2005
Location: Tomball
Posts: 5,365
Points: 18,713
Thanks: 312
Thanked 717 Times in 530 Posts
Alternator SWAP: Dual vs Single S(top units)

Doing some investegation here -

Dual Alternator Trucks use a 135A alternator mounted in the TOP position
Single Alternator Trucks use a 120A alternator mounted in the TOP Postion

Anyone ever look at installing the 135A on a Single Alternator truck ?

I have compared the two units and the 135A is a larger case, same pulley
size, the cast mounting bracket is slightly shorter on the 135a vs the 120a
which im HOPEFUL will compensate for the larger case.

Electrical connections are all the same.

Has anyone tried to swap the larger 135a in place of the 120a ?

Don R.

'04 350 4WD Lariat Crew Longbed (built 05.04)
-------------------

-------------------

Gear Vendors Dbl Overdrive Install w/ Pics.
135 Amp Alternator Upgrade/Replacement
50 Gal. Aux Tank; Pump, Filter, Wiring
Truck Audio,
CUSTOM Valentine One Install - LINK
$10 Grill Mod. (protects the coolers) !

Block Heater Cord (Rear Mounted w/ Timer) - LINK

REALTIME -CURRENT DIESEL Pricing <HERE>
bushpilot is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Old 11-23-2010, 06:18 PM Thread Starter
Senior Member
Threadstarter
 
bushpilot's Avatar
 
Join Date: Aug 2005
Location: Tomball
Posts: 5,365
Points: 18,713
Thanks: 312
Thanked 717 Times in 530 Posts
FYI -

The alternators are the same DEPTH so clearance shouldnt be an issue.
Attached Thumbnails
Click image for larger version

Name:	ALTERNATORS.jpg
Views:	432
Size:	47.5 KB
ID:	27479  

Don R.

'04 350 4WD Lariat Crew Longbed (built 05.04)
-------------------

-------------------

Gear Vendors Dbl Overdrive Install w/ Pics.
135 Amp Alternator Upgrade/Replacement
50 Gal. Aux Tank; Pump, Filter, Wiring
Truck Audio,
CUSTOM Valentine One Install - LINK
$10 Grill Mod. (protects the coolers) !

Block Heater Cord (Rear Mounted w/ Timer) - LINK

REALTIME -CURRENT DIESEL Pricing <HERE>

Last edited by bushpilot; 11-23-2010 at 06:20 PM.
bushpilot is offline  
post #3 of 16 (permalink) Old 11-23-2010, 07:40 PM
Senior Member
 
allstarsixo's Avatar
 
Join Date: Nov 2007
Location: Friendswood Texas
Posts: 2,951
Points: 43,627
Thanks: 94
Thanked 68 Times in 57 Posts
The singles are 110. well at least it was on my Excursion.

Lonnie
allstarsixo is offline  
post #4 of 16 (permalink) Old 11-23-2010, 08:20 PM Thread Starter
Senior Member
Threadstarter
 
bushpilot's Avatar
 
Join Date: Aug 2005
Location: Tomball
Posts: 5,365
Points: 18,713
Thanks: 312
Thanked 717 Times in 530 Posts
ok so its a bit confusing - i always was told the OE single was a 110a, but autozone
shows a replacement 120a - either way the dual alternator trucks are 135/large
case (up top) & a 110a/small case down the bottom.

Im happy to report that i just finished removing my OE 110a (single/top) alternator
and i installed the larger case 135a (dual/top) alternator - fits fine, no modification necessary.

nice to know, if youre 1) looking for an upgrade 2) need some more amps or 3) your in
a pinch and can only get the top 135a unit.

20 bucks for 25 amps more - cheap (when replacing a failing alternator).

Don R.

'04 350 4WD Lariat Crew Longbed (built 05.04)
-------------------

-------------------

Gear Vendors Dbl Overdrive Install w/ Pics.
135 Amp Alternator Upgrade/Replacement
50 Gal. Aux Tank; Pump, Filter, Wiring
Truck Audio,
CUSTOM Valentine One Install - LINK
$10 Grill Mod. (protects the coolers) !

Block Heater Cord (Rear Mounted w/ Timer) - LINK

REALTIME -CURRENT DIESEL Pricing <HERE>
bushpilot is offline  
The Following 2 Users Say Thank You to bushpilot For this addition to TDG:
bootcamp (07-20-2011), harry6.0 (11-24-2010)
post #5 of 16 (permalink) Old 11-23-2010, 08:44 PM
Banned
 
Join Date: Apr 2005
Posts: 6,478
Thanks: 377
Thanked 623 Times in 364 Posts
Thanks Don for the info..
wastedwagesracing is offline  
post #6 of 16 (permalink) Old 11-23-2010, 11:43 PM
Senior Member
 
Join Date: Dec 2008
Posts: 1,171
Points: 21,328
Thanks: 25
Thanked 56 Times in 24 Posts
Then I guess the same logic would apply to put a 135 amp alternator in the bottom position on a truck with dual alternators. so you could have 2 135 amp units. Keith

U. S. Navy Seabee Veteran.

We build, we fight , we drink more beer.

When you are up to your butt in alligators it is heard to remember the reason you are here is to drain the darn swamp.
ktpauley is offline  
post #7 of 16 (permalink) Old 11-24-2010, 03:21 AM Thread Starter
Senior Member
Threadstarter
 
bushpilot's Avatar
 
Join Date: Aug 2005
Location: Tomball
Posts: 5,365
Points: 18,713
Thanks: 312
Thanked 717 Times in 530 Posts
i should have said you walk away w/ 25 amps more over stock for 225 after core/return.

im NOW showing higher charge voltages than i ever have (in the 13.4-13.7 range, even
at idle) and ive never done that even since NEW, last night on the interstate i was only
showing 12v <charging> at night w/ only my factory headlights on - so i knew there was
something wrong & that i would likely end up stranded if i didnt replace the alternator soon.

The OE alternator lasted 105k miles and nearly 7 years (2004), a year ago i replaced
the OE batteries for the 1st (and only time) & about 4 or 6 months ago i added a
third battery (on the frame) - so as much as i know i tax the electrical system on MY
truck - it has also served me well w/ not even a HINT of a problem.

I would have liked the chance to upgrade to a 200a alternator but really that takes
more planning and at the end of the day, you cant beat autozone for their lifetime
warranty and their proliferation of stores (one or more in EVERY town).

Don R.

'04 350 4WD Lariat Crew Longbed (built 05.04)
-------------------

-------------------

Gear Vendors Dbl Overdrive Install w/ Pics.
135 Amp Alternator Upgrade/Replacement
50 Gal. Aux Tank; Pump, Filter, Wiring
Truck Audio,
CUSTOM Valentine One Install - LINK
$10 Grill Mod. (protects the coolers) !

Block Heater Cord (Rear Mounted w/ Timer) - LINK

REALTIME -CURRENT DIESEL Pricing <HERE>

Last edited by bushpilot; 11-24-2010 at 03:30 AM.
bushpilot is offline  
post #8 of 16 (permalink) Old 11-24-2010, 06:55 PM
SLAPS President
 
teamroper60's Avatar
 
Join Date: Dec 2008
Location: Troy, MO
Posts: 3,027
Points: 36,738
Thanks: 163
Thanked 404 Times in 332 Posts
Images: 9
Garage
Good info Don!! Keep us posted on how it works. That may be a good option for those who are seeking a slightly bigger alternator...

Speaking of which................. A while back, I bought a 160a from Alternator parts and the voltage regulator went bad in it. I talked to them and sent it back. They replaced the regulator and returned it. It lasted a couple of weeks and the regulator went bad again.... I have tried calling them several times but they won't return my calls, so now I am having to look at other options..

I have checked my grounds and everything looks good. I have checked the batteries and they are testing good. Running the stock alternator, I have not experienced the same problems, so that leaves me wondering what the deal is.... Since I have not seen anyone else post about having problems with their stuff and most of those are even higher amp alts than mine, I am wondering if there is a heavier duty regulator out there that perhaps they don't put into an alt of my size.......

Any suggestions??

2003 Toreador Red/Arizona Beige CC, DRW, Lariat, FX4, 6.0 PSD, Torqshift, born early Feb. 03; Silverline turbo-back dual exhaust; 155's from Full Force Diesel (Casserly); Di-Pricol gauges; ARP studs; Dfuser regulated return; AFE PG7;Tunes by Tony Wildman & IDP; B&W hitch; DIESELSITE Coolant filter; a whole bunch of "bling"; Connex 4300hp; Pioneer DEH6100BT radio; JL Audio 275w amp w/ 12" sub; Alpine door and rear seat speakers. pics
#43
Dually club member #76

SLAPS President and Webmaster

If you love wealth more than liberty, the tranquility of servitude better than the animating contest of freedom, depart from us in peace. We ask not your counsel nor your arms. Crouch down and lick the hand that feeds you. May your chains rest lightly upon you and may posterity forget that you were our countrymen. - quote by Samuel Adams

Political correctness is a doctrine fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end
teamroper60 is offline  
post #9 of 16 (permalink) Old 11-25-2010, 02:24 AM Thread Starter
Senior Member
Threadstarter
 
bushpilot's Avatar
 
Join Date: Aug 2005
Location: Tomball
Posts: 5,365
Points: 18,713
Thanks: 312
Thanked 717 Times in 530 Posts
2nd day running it and its proving out well.....idling w/ a FULL LOAD (thats ALL of my
lights, an 1100w inverter and AMPS galore) and i was NOT able to bring it under 13 volts !

Don R.

'04 350 4WD Lariat Crew Longbed (built 05.04)
-------------------

-------------------

Gear Vendors Dbl Overdrive Install w/ Pics.
135 Amp Alternator Upgrade/Replacement
50 Gal. Aux Tank; Pump, Filter, Wiring
Truck Audio,
CUSTOM Valentine One Install - LINK
$10 Grill Mod. (protects the coolers) !

Block Heater Cord (Rear Mounted w/ Timer) - LINK

REALTIME -CURRENT DIESEL Pricing <HERE>
bushpilot is offline  
post #10 of 16 (permalink) Old 11-26-2010, 12:16 PM
Senior Member
 
UpstateDieselGuy's Avatar
 
Join Date: Dec 2008
Posts: 2,821
Points: 59,721
Thanks: 55
Thanked 120 Times in 116 Posts
Very Interesting. How much larger of a case does it have? I know that the limiting factor for the stock alternator is its case size as it limits the amount of windings and cooling issues. If this is larger physically it may also allow for further bumps if necessary. Chris

I'm a little more country than that...

2011 F-350 Extended Cab Short Box Lariat

SOLD
2004 F350 Regular Cab Long Box XLT; FX4, 6.0L and TorqShift; Manual Transfer Case and Hubs; Dark Shadow Grey Metallic; Keyless Entry; Factory Idle Control; 8 1/2' Fisher MMII; Factory 18" Wheels painted black with 305/70R18 Mickey Thompson ATZ's in the summer and XL Steel Wheels painted Black with 285/75R16 ProComp A/T's in the Winter; Rough Country 2.5" Leveling Kit; Isspro Pyrometer, Boost, and Transmission Temperature Gauges in an Overhead Pod; SCT by Innovative Diesel; Innovative Moderate FICM Tune; ARP Head Studs; '03 Turbo screaming through a 4" Turbo Back 409 MBRP System with both Deletes and 6" Tip.
UpstateDieselGuy is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com 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










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



Similar Threads
Thread Thread Starter Forum Replies Last Post
Dual alternator, testing? lilpooh 2003-2007 6.0L Power Stroke 26 10-22-2010 02:39 PM
Motorcraft Belt - 6.0L Single Alternator cartmanea Ford Parts 1 02-10-2010 02:15 AM
7.3 dual alternator bracket chris hernandez Ford Parts wanted 0 11-19-2009 12:34 PM
Deleting one alternator from a dual alt setup? SteveIn29 General Ford Truck and Excursion 5 02-27-2007 12:15 PM
Dual Alternator Setup M.R.C. F-250 2003-2007 6.0L Power Stroke 5 09-22-2005 04:01 AM

Posting Rules  
You may not post new threads
You may not 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