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Upgrade electric system, alternator, Fusible Links, remove External Voltage regulator


tamo3

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I'm working on upgrading electrical system.

My car is '75 280z.

My goal is :

  • Replace Alternator to CS144 with removing external voltage regulator.
  • Remove Shunt.
  • Add extra fuse with install Maxi-fuse box. (75 has only 2 fusible link)
  • Add ignition relay (75 does not have it)
  • Swap Ammeter and Voltmeter

My '75 280z has only 5 wire for external voltage regulator.

When I googled, several people encounter issue for the missing #1 wire, which is green/red colored.

Blues web site is always helpful. There is answer for this.

HELP 75 Alternator swap

I just create illustration for this solution.

post-25433-1415083062901_thumb.jpg

I will keep update the progress.

Edited by tamo3
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You can grab CS144 alternator from Cadillac DeVille. Try to find 92-94 in the junkyard.

post-25433-14150830629634_thumb.jpg

The hardest part is to remove pulley. There is taper collar that prevent from removing the pulley.

CS144 pulley removal - tapered collar type - International Full Size Jeep Association

post-25433-14150830630845_thumb.jpg

I could not remove the the taper collar, so I grinded to remove the pulley.

Just follow instruction video to rebuild alternator.

Part 1

Part 2

Paint the cover too.

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completed.

post-25433-14150830631445_thumb.jpg

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post-25433-14150830629917_thumb.jpg

post-25433-14150830630254_thumb.jpg

post-25433-14150830630557_thumb.jpg

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Shunt!

I searched on web, but I could not find any good information about '75 280z shunt.

I learn some earlier model has shunt inside of the car (maybe 240z, 260z?) later model is in the engine bay.

This is the shunt!

post-25433-14150830638581_thumb.jpg

post-25433-14150830636987_thumb.jpg

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post-25433-14150830638318_thumb.jpg

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interesting post - but i'm still a little fuzzy on why the switch to this particular CS144 model.

the "performance curves" graph seems to start at about 1,200 rpm, and i don't know what the pulley ratio is in relation to the crankshaft, so i'm not sure if this alternator kicks in sooner or provides an overall greater output or what...

interested in finding out though!

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Hi Tamo,

 

Do you have any photo's of the pulley? Nice photo's on removing the old one. Just wondering how the 280Z pulley fits or do you use another pulley all together.

 

Great photo's. Makes the modification clear and easy to follow. It will be intersting to see how this unit performs.

Chas

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  • 2 months later...

Working on Voltmeter re-wiring.

 

I follow the direction from zcar.com post.

http://www.zcar.com/forum/10-70-83-tech-discussion-forum/81242-amp-voltmeter-conversion.html#/forumsite/20721/topics/81242

 

No need to modify the big connector 

 

Smaller connecter need to rewire.

- Black with red tag is measuring Voltage.

- Black connect to black wire in the big connector. This is ground earth.

- Green/white is connect to same as Ammeter.

post-24248-0-08755200-1420586763_thumb.j

 

I need to find where I should merge this Voltage line near the fuse box....

post-24248-0-99779900-1420586769_thumb.j

 

post-24248-0-00799100-1420586777_thumb.j

Installed and run the wire.

 

Anyone direct me where should I connect the voltage measurement wire?

 

Thanks,

tamo3

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