Reed Farrar Posted November 19, 2013 Report Share Posted November 19, 2013 I just got a 320 amp alt for my 2.4L Oldsmobile Alero and when im at idle it sits at the 12s but when i give it any gas they go up to 14.8 every time. If anybody can help me i would appreciate any advice. I have no subs or amps hooked up, I have 0 gauge CCA from the alt to the battery, 300 amp fuse, And ground from battery to mount on alt. Got a new belt also since the pulley is smaller on this alt. Quote Link to comment Share on other sites More sharing options...
HHR Ed Posted November 19, 2013 Report Share Posted November 19, 2013 Alternator is probably tuned for slightly higher RPM. Quote Ed Lester ShowtimeSPL Host Showtime Electronics Video MarketingMy old Build Loghttp://www.stevemead...08/#entry511451http://www.youtube.com/showtimespl 5 time dB Drag Finalist Last ride 2007 HHR, current dB 153.5 and bass race 149.4 dB. 153.0 dB on music New Ride, 2008 HHR SS. Build under way. Loudest score ever = 171dB 2009 dB Drag Racing, North American Points Champion Link to comment Share on other sites More sharing options...
Lbox88 Posted November 19, 2013 Report Share Posted November 19, 2013 (edited) What do you idle at? I have a 320 also and it works fine, but I idle at about 7-800RPM, I think that's right at the line for the turn on speed. EDIT: Edited November 19, 2013 by Lbox88 Quote UBL | Build Log Link to comment Share on other sites More sharing options...
SnowDrifter Posted November 19, 2013 Report Share Posted November 19, 2013 Not charging at idle. What RPM do you idle at? Alts are typically rated at an 800rpm idle. If yours is lower, you'll see a drop in performance Quote ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
LoudBimmer Posted November 19, 2013 Report Share Posted November 19, 2013 My car idles at 600rmp, but alternators turns on at ~700rpm. So at idle, my voltages goes down to low 13's. Quote Link to comment Share on other sites More sharing options...
Reed Farrar Posted November 19, 2013 Author Report Share Posted November 19, 2013 my car idles like 600 700 so im guessing thats why. does anybody know what to do about this kinda situation? or is there nothing i can do? Quote Link to comment Share on other sites More sharing options...
hdorre Posted November 19, 2013 Report Share Posted November 19, 2013 Give Mechman a call. Quote On 5/8/2011 at 7:38 PM, Kranny said: On 5/8/2011 at 7:35 PM, 'Maxim' said: It hurts me inside when I read stuff like this and remember you're 15 LMFAO so true Mitsubishi 3000GT (Old Build) Headunit: Pioneer 80PRS Frontstage: (2) McLaren Audio MLT-2 Tweeters & (4) PRV Audio MR Series Neo 6.5" Mids Substage: 4 15" Hybrid Subs - Tantric Motors & Sundown Softies Amps: Banda 2.4D Amp (Tweets), American Bass VFL 350.4 (Mids), and (2) Ampere 3800s Electrical :Singer 260A Alt & JY Power Lithium 2005 Chevy Colorado Ext Cab Headunit: Pioneer 80PRS Frontstage: 4 PRV 700Ti Tweets & 6 10" Delta Mids on 3000wrms Substage: 6 Fi BTL 18s in a 4th Order Walkthrough on 3 Wolfram 4500s Electrical: Singer "390" and JY Power My Official Feedback Thread Link to comment Share on other sites More sharing options...
truthsayer Posted November 19, 2013 Report Share Posted November 19, 2013 Does your Alt have a large or small pulley. If it's large change to a smaller pulley. Quote truthsayer Link to comment Share on other sites More sharing options...
hdorre Posted November 19, 2013 Report Share Posted November 19, 2013 Does your Alt have a large or small pulley. If it's large change to a smaller pulley. "Got a new belt also since the pulley is smaller on this alt." -Copied from OP Quote On 5/8/2011 at 7:38 PM, Kranny said: On 5/8/2011 at 7:35 PM, 'Maxim' said: It hurts me inside when I read stuff like this and remember you're 15 LMFAO so true Mitsubishi 3000GT (Old Build) Headunit: Pioneer 80PRS Frontstage: (2) McLaren Audio MLT-2 Tweeters & (4) PRV Audio MR Series Neo 6.5" Mids Substage: 4 15" Hybrid Subs - Tantric Motors & Sundown Softies Amps: Banda 2.4D Amp (Tweets), American Bass VFL 350.4 (Mids), and (2) Ampere 3800s Electrical :Singer 260A Alt & JY Power Lithium 2005 Chevy Colorado Ext Cab Headunit: Pioneer 80PRS Frontstage: 4 PRV 700Ti Tweets & 6 10" Delta Mids on 3000wrms Substage: 6 Fi BTL 18s in a 4th Order Walkthrough on 3 Wolfram 4500s Electrical: Singer "390" and JY Power My Official Feedback Thread Link to comment Share on other sites More sharing options...
Kyblack76 Posted November 19, 2013 Report Share Posted November 19, 2013 Once again, the biggest isnt always the "best" Quote SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold Link to comment Share on other sites More sharing options...
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