load350z Posted July 13, 2015 Report Share Posted July 13, 2015 Hey members, im thinking about upgrading my alternator to the mechman 270a for my altima but was wondering how the drive ability is. I have an excessive amperage installed now but every now and then when i have to accelerate quickly, the alternator seems to cut out and the car goes limp for a sec until the rpm's drops back down, usually does this above 4500rpms. just wondering if anyone experience this with the mechman alts. Thanks in advance! Quote 2002 Nissan Altima v6 3.5 Four Incriminator Audio Death Penalty 15s 5 Pairs DS18 Pro Audio X6.5BM 3 Pairs DS18 Super Tweeters Taramps TS2000x4 (Mids Amp) Incriminator Audio 6.4 (Tweeter Amp) Incriminator Audio 40.1 subs amp Rockford Fosgate 3sixty.3 3 shuriken batteries (BT-80 under the hood) (2 BT-120 in the trunk) with isolator Big 3 zero gauge. Excessive amperage H/O 225a Alpine head unit Lots of stinger deadener Link to comment Share on other sites More sharing options...
audiofanaticz Posted July 13, 2015 Report Share Posted July 13, 2015 This issue can be from a few things. That almost sounds to me like a belt slip issue on your current alternator. The belt could be old, and stretched allowing for belt slip. The Idler pulley could be going weak and not keeping proper tension on the belt. The belt wrap around the pulley may not be sufficient which could also cause belt slip (especially if the alternator has a tiny under drive pulley on it). It could also be due to an insanely small under drive pulley on the alternator if its only happening at higher engine RPMs, which with the under drive pulley its making the alternator spin to fast so its out of its operating range. There shouldn't be this issue with any quality high output alternator in my opinion. Quote Link to comment Share on other sites More sharing options...
load350z Posted July 13, 2015 Author Report Share Posted July 13, 2015 Yea could be old belt... its been on there for about a year now.. i'll try a new belt first then go from there Quote 2002 Nissan Altima v6 3.5 Four Incriminator Audio Death Penalty 15s 5 Pairs DS18 Pro Audio X6.5BM 3 Pairs DS18 Super Tweeters Taramps TS2000x4 (Mids Amp) Incriminator Audio 6.4 (Tweeter Amp) Incriminator Audio 40.1 subs amp Rockford Fosgate 3sixty.3 3 shuriken batteries (BT-80 under the hood) (2 BT-120 in the trunk) with isolator Big 3 zero gauge. Excessive amperage H/O 225a Alpine head unit Lots of stinger deadener Link to comment Share on other sites More sharing options...
Masterbasser Posted July 16, 2015 Report Share Posted July 16, 2015 ya try new belt make sure its tight as fuck,belts lengthen over time, post a pic of the belt going around the pulley on ur alternator so we can see ur belt wrap,the more belt u got on pulley the less it will slip Quote Kenwood excelon ddx795 3 370 amp CES alternators (audio side only) McLaren dome tweeters Crescendo 6.5 ultra neos NVX JAD800.4 4 PA x4 SPL 18's 4 Digital Designs m5's at .7 ohms each 2 K2 80 ah lithiums 3 group 31 agms Ledglow million color (12 piece) 2007 Yukon xl Link to comment Share on other sites More sharing options...
load350z Posted July 16, 2015 Author Report Share Posted July 16, 2015 I will once i get the car back from nissan! Quote 2002 Nissan Altima v6 3.5 Four Incriminator Audio Death Penalty 15s 5 Pairs DS18 Pro Audio X6.5BM 3 Pairs DS18 Super Tweeters Taramps TS2000x4 (Mids Amp) Incriminator Audio 6.4 (Tweeter Amp) Incriminator Audio 40.1 subs amp Rockford Fosgate 3sixty.3 3 shuriken batteries (BT-80 under the hood) (2 BT-120 in the trunk) with isolator Big 3 zero gauge. Excessive amperage H/O 225a Alpine head unit Lots of stinger deadener Link to comment Share on other sites More sharing options...
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