D24T.com  

Go Back   D24T.com > Technical Discussion Area > Body and Interior

Reply
 
Thread Tools Display Modes
  #1  
Old 11-16-2021, 08:11 PM
DieselScout DieselScout is offline
Senior Member
 
Join Date: Aug 2014
Location: Upstate, NY
Vehicle: 1982 245-GL D6, 1982 244-GL D6
Posts: 176
Default 240 D24 Alternator Options

Can any of the below alternators work in a 240 D24 NA without any modifications (plug-n-play, maybe except for swapping the pulley)?

Also need it to be compatible with the tachometer.

80A Bosch
https://www.fcpeuro.com/products/vol...-dl-745-al157x

100A Bosch
https://www.fcpeuro.com/products/vol...780-940-al155x
Same as this on Ebay, I believe: https://www.ebay.com/itm/25482654086...gAAOSw8-Rf9MBu

100A Nippon-Denso
https://forums.turbobricks.com/showthread.php?t=282770

140A Bosch
https://www.ebay.com/itm/140-Amp-Vol...-127632-2357-0
Reply With Quote
  #2  
Old 11-18-2021, 04:52 PM
ngoma ngoma is offline
Supporting Member
 
Join Date: Nov 2009
Posts: 1,382
Default

The tach wants the "W" terminal on the alternator. Do any of those have a W terminal?

Otherwise, you could add the W terminal with a little surgery:
Gas Tacho / Revcounter Conversion to Diesel W terminal

And there are YT videos showing how.

I ended up having my bad alternator rebuilt at a local starter/alternator (in-house) rebuild shop. PIA to deal with the know-it-all grumpy guy but he did a good job.
__________________
1985 744 gle d24t
1985 745 gle d24t
Reply With Quote
  #3  
Old 11-19-2021, 08:11 AM
v8volvo v8volvo is offline
Supporting Member
 
Join Date: Jun 2009
Location: Montana, USA
Vehicle: '86 745, '83 764
Posts: 1,655
Default

The design of the alternator case might also be a factor (whether it is able to bolt in to the factory bracket). I don't think any of those that you linked to are the same size/design as the factory 55A alt.

If the goal is adding higher output, I wonder if a clever enough rebuilder would be somehow able to upgrade or hot-rod the factory style alternator? Maybe use the back half of some other alternator built into the front bolt-on case from the factory style?

Or if you are going to go to the effort of reengineering the system to add output, another option rather than trying to swap a different alternator in place of the factory one would be to add a second alternator somewhere instead. Maybe right above the factory alt since on a nonturbo D24 that doesn't have the turbo inlet in the way, I think there is some extra space available there. Some heavy duty pickups (Ford Powerstroke, GM, etc) offer dual alternators as an option for applications that have heavy electrical demand like emergency vehicles so it is a concept that is known to work well. As a side benefit the second alternator gives some redundancy.

You would of course need to fabricate a custom bracket for that and need to think about how it would work in terms of running the belts. But it might be an interesting alternative, and it would also save you from having to worry about the W terminal or pulley diameter for the tach since you would still have the stock diesel alternator in place to handle those tasks, and could use any other alternator as your secondary regardless of it having a W output.
__________________
86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
Reply With Quote
  #4  
Old 11-19-2021, 09:18 AM
ngoma ngoma is offline
Supporting Member
 
Join Date: Nov 2009
Posts: 1,382
Default

Quote:
Originally Posted by v8volvo View Post
The design of the alternator case might also be a factor (whether it is able to bolt in to the factory bracket). I don't think any of those that you linked to are the same size/design as the factory 55A alt.
That was the main reason I had mine rebuilt. Too hard to figure out if the mounting ears (on the candidate alternators) were the correct dimensions and locations.

To really make use of a higher amp output alternator will require rewiring the stock Volvo accessory wiring with heavier gauge.
__________________
1985 744 gle d24t
1985 745 gle d24t
Reply With Quote
Reply

Tags
alternator, amperage, d24t, electrical

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -8. The time now is 04:46 AM.


Powered by vBulletin® Version 3.8.10
Copyright ©2000 - 2024, vBulletin Solutions, Inc.