In this pic you can see the depth issue I refered to where the shaft of the alt goes through the pulley. They are different diameter holes, and the I30 shaft does not have the length to allow the nut to be secured if you did manage tpo machine the hole to fit.
The Z alt bracket must be modified to accept the I30 adjustment location. This was very easy and simply require the use of a cut-off wheel and a sharpie. Since the I30 adjustment tang is clocked at 4:00 it moves the bracket attachment point further down the arm. First I drilled the threads from the hole with a slightly oversized bit. Then installed the Z bracket. I noticed it was necessary to remove a little of the case around the hole as it was interfering with the bracket. After that I simply mounted the alt and installed the belt. Then centered the adjustment on the alt and pulled the alt tight against the belt. This gave me the approximate location of the hole further down the bracket. That's where the sharpie came in. Then I drilled the hole and cut the bracket. A little trim work and made to fit. I left myself a little extra just in case.
The following are pics of the install. I installed this about 6 weeks ago. Initially I was riding around on the larger pulley and it worked well with the occasional belt screech. A week after I installed this my wife went into premature labor and my daughter was born 1 month early. Needless to say I had to put the Z on the backburner for a bit. In that week I before my daughter arrived I put about 700 miles on the car. In the summer heat with everything on, (electric fan, a/c, stereo w/ amp, headlights, etc) the volts never went below 13 at idle and during cruise they never went below 13.5. without the headlights the volts were pegged at 14. Before that my 90 amp Z alt was struggling at idle dipping below 12 and never saw 14 with a full load. It was getting old and that may have contributed but it performed well until it was loaded up.
That being said I've been driving my wifes hyundai for the last month giving the Z a break, as it's my commuter, and the new pulley has yet to be installed. The Z is all tucked away in the garage and I miss driving it but it deserves a break. Sometime this week I'll install the pulley. It should make no difference other than stopping the occasional belt screech as it will support the belt properly.
Here's what the alt looks like in place.
Prior to the bracket being fitted.
One more item. I trimmed the bracket back a tad where the belt passed next to it. It wasn't really necessary as it had about 2mm clearance but it made me feel better that the belt wouldn't rub for whatever reason. It only took a few minutes with a grinder to releive that area.
Although I had the Maxima main supply harness I opted to extend and reterminate the supply wires to my liking. The Maxima uses a single battery cable gauge wire (8 gauge). Adapting this to 2 12 gauge wired wasn't to my liking so I spliced in 2 10gauge wires and installed terminal ends to fit. Also the Maxima terminal end has a 90 degree bend to it which placed the harness at an angle I didn't like. With straight terminal ends it allowed for a more relaxed approach to the alt from the harness. By the way I also picked up a replacement dust boot to cover the connections and I'll install that when I do the pulley.
The voltage reg/sense wire is pretty straight forward. I found a Maxima wiring diagram online and they use the same color code for the one of the wires. The white wire with the red stripe is the same and the remaining wire gets the other. It's been 6 weeks but I believe the white/red is the 12v sense, but that available in the Z FSM if I'm mistaken.
OK, fire away, I'll field all the questions I can before the next feeding.
Alternator upgrade for the Z to 140amp Infinity I30 - 
