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<DIV><FONT face=Arial size=2>I swapped in a 99-01 altima alternator into my NX.
I read on the sr20forum that it outputs 120 amps, although i was unable to
confirm that. However, the installation was straight forward. It was a direct
swap, I didnt even swap the pulley. The altima alternator housing is slightly
larger than an sr20 alternator housing. The pulley on the altima alty is smaller
in diameter than the NX2K alternator, but it falls in line with the sr20 drive
belts. I still have the stock pulley just incase something unfotunate happens
down the line. I have had it on for several months without issue. I picked it up
at a local junkyard for $50.</FONT></DIV>
<DIV><FONT face=Arial size=2>The maxima alternator sounds like alot more work,
since all of the connectors on the altima alty are exactly the same as the sr20
alternator.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Charlie</FONT></DIV>
<DIV><FONT face=Arial size=2>92 NX2K</FONT></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mark@mnautosport.com href="mailto:mark@mnautosport.com">Mark
Holden</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=se-r@lists.deskmedia.com
href="mailto:se-r@lists.deskmedia.com">SE-R List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, April 05, 2008 7:07
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Alternative altermator</DIV>
<DIV><BR></DIV><BR>Some months ago I mentioned that i was looking to adapt a
125A alternator from the 95-97 Maximas to my SR20DE.<BR><BR>Well, it's done,
and here's what I learned.<BR><BR>There are two alternators used on the 95-97
Maximas, a 110A unit and a 125A unit, both I believe are Hitachi made. I
expect that everything I learned about the 125A unit applies to the 110A unit
also, but I can't say for sure.<BR><BR>First, a couple of links to some data
sheets:<BR><BR>The alternator for the 91-94 SE-R/NS2k and 91-93 G20 - <A
href="http://www.vicic.com.tw/alternators/gva8010.htm">http://www.vicic.com.tw/alternators/gva8010.htm</A><BR><BR>The
alternator for the 95-97 Maxima and 96-97 I30 - <A
href="http://www.vicic.com.tw/alternators/gvhn11250101.htm">http://www.vicic.com.tw/alternators/gvhn11250101.htm</A><BR><BR>The
differences are fairly slight:<BR> - 1mm difference in the radius between
the center line of the pulley and the pivot at the block<BR> - 2mm
difference between the center line and where the adjuster bolt attaches.
<BR> - The pulley on the Maxima unit is 63mm in diameter and the SR20
unit is 70mm.<BR> - The connectors are different<BR> - The Maxima
unit lacks a nice threaded hole to attach the ground wire<BR> - The post
of the output on the Maxima unit is larger in diameter.<BR> - The pivot
points at the front of the alternator is 13mm on the Maxima unit rather than
the 25mm of the SR20 unit.<BR><BR>What I did mechanically:<BR> - Swapped
the pulley from the Sentra alternator to the Maxima unit. It's handy to
have a small impact wrench for this because then you don't have to clamp the
pulley to remove the 24mm nut. If you had to clamp it, you'd want to pad
it well to avoid damaging it. My HF 18v unit that doesn't have enough
torque to break loose a lug nut was plenty for this.<BR> - The unit will
slip right on, but because the pivot point at the front is 12mm thinner, there
will be a gap. What you want for this is a 12mm spacer with an inside
diameter of 10.5mm or greater. I still need to find something like this,
I just put a nut in there as a temporary fix. There is a sleeve that
came installed incorrectly on the alternator I bought, that is on the other
pivot point. I had to tap it into place with a small hammer (or whatever
was handy, probably a wrench :) ). Because I used the nut instead of a
spacer, I had to take off the bracket at the front of the block that holds the
front alternator pivot in double shear and then reattach it after the bolt was
through.<BR> - In order to get the adjustment bolt attached to the
alternator I had to loosen the adjustment bracket where it bolts to the block,
get the adjuster attached to the alternator and then re-tighten the bracket
bolts. This is because of the slight difference in the diameters of the
alternators, and is only an issue at the far end of the adjustment range.<BR>-
there is a 0.3mm difference in the location of the pulley with the new
alternator, however, in practice, it doesn't seem to make any
difference.<BR><BR>What I did electrically:<BR> - Because this unit puts
out such a higher amperage (my specific alternator bench tested at 158A peak
output!), I added a 4ga wire that runs from the alternator to the
battery. I left the original wires in place (one runs straight to the
battery, the other to the main fuse/relay panel by the battery), but had to
crimp new rings onto them to fit the larger post on the alternator. I
also ran a 4ga 32" long pre-made negative cable to replace the stock
ground. Because i will be relocating the battery and I have a deep-cycle
Optima bluetop, I just attached it to the extra terminal on the battery for
now. The battery will move, and in it's place will go a 1-into-4
distribution block. If the battery was staying and a normal sort, I'd
look at one of those battery terminals that integrates a distribution
block.<BR>- Because the new alternator lacks the threaded hole for the ground,
I took loose one of the nuts on the alternator housing (probably right where
the regulator is) and attached it there.<BR>- I pulled a spare Maxima
alternator at the junkyard, and took the wiring harness with it. I cut
off the last 6" and made a pigtail with Anderson Powerpole connectors.
You could also splice directly into the Sentra wiring harness, but I wanted to
be able to swap back to a stock unit quickly (this is a race car, so things
like that happen). Each alternator has an S and an L terminal and
there's a diagram right on the alternator showing which is
which.<BR><BR><BR>That's it. Works like a champ!<BR><BR>The specific
alternator I used was a brand-new (not rebuilt) unit made by NSA (ALT3205)
bought through Rock Auto. The build quality seems quite good for a low
cost unit.<BR><BR>-- <BR>Mark Holden<BR><A
href="mailto:meh710@gmail.com">meh710@gmail.com</A>
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