SleeperZ31 Posted June 18, 2008 Share Posted June 18, 2008 Im looking to upgrade my '87 N/A z31 to a 90amp maxima alternator and from looking at some other z sites im a bit lost , some say it needs a entirely different pulley and spacers, one site says all i have to do is grind some of the bracket and find a belt that'll fit without too much slack, so i just need to figure out what all i need to do and whether or not theres just a better Z alternator out there, thx, PS i mostly need the extra amperage to run a better ignition system( MSD 6al in the future) and to keep my electric fan from killing my charging system, it kicks on alot with the humid weather around here, so yeah..thanks again all... Quote Link to comment Share on other sites More sharing options...
Careless Posted June 18, 2008 Share Posted June 18, 2008 i'm not sure if you've seen this link, but AZ-BUM illustrated it quite well on his very good informational database: http://www.az-zbum.com/modification.maxima.alternator.shtml Quote Link to comment Share on other sites More sharing options...
SleeperZ31 Posted June 19, 2008 Author Share Posted June 19, 2008 yeah, i found that a long time ago before i joined hybridz, thanks for the link, so pretty much all id have to do is swap pulleys from my old Z alternator to the maxima alt. to retain stock belt function, right? wouldnt the size difference in pulleys make the alternator produce less amperage at idle and defeat the purpose of it in the first place though? My cars been having rough starts and idles poorly for about 5 mins till its warmed up, and it never did this until the new radio and e-fan install so im guessing the charging systems to blame, right? Quote Link to comment Share on other sites More sharing options...
SleeperZ31 Posted June 20, 2008 Author Share Posted June 20, 2008 okay, the new alt. is installed, on 87' up z31s its pretty easy, just a 405k4 belt and a little grinding on the adjuster bracket and its in, runs a bit stronger than the old 70 amp did with the fan and lights on, definently worth the work. Quote Link to comment Share on other sites More sharing options...
Careless Posted June 20, 2008 Share Posted June 20, 2008 really? hmmmm.. i notice when i turn my lights on in my 87z31t it drops rpm's by about 100 :-/ Quote Link to comment Share on other sites More sharing options...
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