found this Alt in my parts box for the stroker. Hitachi alt apparently 60 amp but the part number says rxa039 is a 50 amp alt.
Either way how do I tell if It's internally or externally regulated?
My existing 35 amp bosch one is external but easy to tell with It's match box thing on back.

The number of external terminals gives it away.
From what I can see in the pic. there are the S, L spade terminals and the A and E post.
That implies it is internally regulated.
The terms "Internal" or "External" refer to whether the alternator has it's own Voltage Regulator, located somewhere in/on the alternator, or whether an additional VR is necessary to control the charging circuit.
By definition, an Externally Regulated Alternator will have more wires between the two devices.
Relevant connections for that example.

High output alternators are only required for high loads.
If the car doesn't have a sound system that destroys bowels at 50 paces, 50A will be more than adequate
Even the Bosch 35A is more than adequate.
My favourite soapbox rant is about "fitting a nuclear rated alternator" to a standard car.
For a start, the need is largely not there.
Then you must consider the engine wiring loom current rating.
Nissan would have dimensioned the wiring to safely handle the alternator maximum output e.g. 35A.
Connecting in an alternator that is CAPABLE of producing 50 or 60 amps, well, you can see where this is going
So, do your sums and be honest with yourself.
If a higher output is electrically necessary, for whatever reason, then the associated wiring will need to be, protected, upgraded, and/or supplemented with another power distribution system.
None of these requirements are difficult to achieve but unless you enjoy engine bay fires, they are absolutely necessary

_________________
Regards, Graeme
Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net

Thanks. I have considered that. My h4 lights like a bit of power. It's all relayed etc so not to stress the stock wiring.

Just realized my stock alt is external regulator. How do I by pass the external reg? Just unplug it?
I remember in the 1200 I had to loop 1 wire from one connection to another.

Yes just unplug it and remove it.
You'll need to use one of the wires between the plug and the alternator to feed 12V to the S terminal and another for the L terminal.
Depends on the original wiring but the schematic I posted above is what will be required for it to function correctly.

_________________
Regards, Graeme
Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net

So can't just loop a wire connection at the plug to the external reg to do the same thing?

http://www.z-car.com/blog/cars/converti ... alternator

Yes, just loop what you need to achieve the Sense and Lamp functions.

_________________
Regards, Graeme
Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net

Ok so at the voltage reg plug after i disconnect it,
do I plug yellow to w and wr to wb ?
Do I need to change wiring at plug to the alt then?
As I don't have auto choke carbs I don't need that function.

Cheers

Anyone?

white with blk stripe short to white with red stripe

yellow short to white

one can use the old volt reg side connector and solder the wire to gether and heat shreink it down then plug back in. But most use old burnt up volt regs not to have a spare volt reg not being used.

Just make sure the color are correct if you use this method as I seen the correct coclor put went to the wrong spot in connector(aftermarket volt regs)


as stated above if you have a autochoke relay your battery will drain and needs to be disconnected

save this photo and use it