bamaman Posted July 7, 2015 Report Share Posted July 7, 2015 Mine came with a smaller pull and was advised to get a belt 1/2in - 1in smaller. Quote Link to comment Share on other sites More sharing options...
Jhunt94 Posted July 7, 2015 Report Share Posted July 7, 2015 I have an 07 F-150 with the 5.4 with a 250a Mechman and mine charges at 14.3 on start up. Throughout the day it will drop to around 13.7 but I've heard that it's normal because of something to do with the PCM. I've never experienced what you're talking about with the voltage going down while revving it. If anything, on really cold mornings, I've seen my voltage go up from 14.3 to 14.6 while driving. Quote 2007 Ford F-150 Reg. Cab. Flareside250 Mechman AlternatorSky High Car Audio Big 3 XS Power D3400Rockford Fosgate 1/0 amp kitRockford Fosgate T1500-1bdcpRockford Fosgate T400-4DC Audio Lvl 4 12"Rockford Fosgate Punch 6.5" componentRockford Fosgate Punch 6x8Pioneer AVH-P2300DVDSMD Volt Meter Link to comment Share on other sites More sharing options...
SJonus Posted July 7, 2015 Author Report Share Posted July 7, 2015 what size pulley is on yours JHunt?.... Quote 2004 F-150 Lariat 2 PGold 800 rms amps to subs 1 Hifonics 640.4 brutus to m/h 4 a2-65 6" percisionpower-mids 4 PT.2 tweets percisionpower-hi's 2 12" PA mofo's/box by "dave the box guy" big 4 0/1 g front to back / 2 optima yellow tops nutin special.... Link to comment Share on other sites More sharing options...
everybodyknowme Posted July 7, 2015 Report Share Posted July 7, 2015 I have a smaller pulley on mine but I installed new 1 inch shorter belt, new tensioner, new pulleys, etc still only 14.2 maybe in the early mornings. No belt slip or black residue. After that 14.0 all day even with system not playing and drops to 13.9 when pressing on the gas. Mechman has not got back to me yet left a message. Also mine is not PCM controlled so I should be seeing benefits with this alt. Tested voltage directly from the alt again this morning upon first crank of the day and 14.2. Car has been sitting overnight 10+ hrs and only 14.2.WTF. When I first installed 3 months ago it was 14.4 at start up. Losing volts on a new alt has me confused. Nothing has changed in my system but the lower voltage. Quote Link to comment Share on other sites More sharing options...
tyma1026 Posted July 7, 2015 Report Share Posted July 7, 2015 I would recheck the battery to alt connection. Make sure it is all the way tightened. Quote Link to comment Share on other sites More sharing options...
tyma1026 Posted July 7, 2015 Report Share Posted July 7, 2015 Just speaking from personal experience. I made the mistake of tightening the bolt but due to a bad angle it was not snug against the alt. the bolt slowly came loose and my voltage died. After I noticed it, I bought a couple of 12 in extensions and tightened the bolt correctly. Lesson learned. I will never rush to install an alt again and definitely not after midnight again. If this is not your case then carry on Quote Link to comment Share on other sites More sharing options...
SJonus Posted July 7, 2015 Author Report Share Posted July 7, 2015 my whole point about this is..my amps and everyone else's say they need 14.2 or 14.4 volts to run optimum ..and i dont have that...am i wrong.?.do i not need 14.4 volts for the amps????? ..or is it all about the alternator amperage?..someone school me plz..heh Quote 2004 F-150 Lariat 2 PGold 800 rms amps to subs 1 Hifonics 640.4 brutus to m/h 4 a2-65 6" percisionpower-mids 4 PT.2 tweets percisionpower-hi's 2 12" PA mofo's/box by "dave the box guy" big 4 0/1 g front to back / 2 optima yellow tops nutin special.... Link to comment Share on other sites More sharing options...
n8ball2013 Posted July 7, 2015 Report Share Posted July 7, 2015 Well since you ignored it. What do your batts float at? Individually and after 24 hours not charged Quote THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
Miguels Posted July 7, 2015 Report Share Posted July 7, 2015 my whole point about this is..my amps and everyone else's say they need 14.2 or 14.4 volts to run optimum ..and i dont have that...am i wrong.?.do i not need 14.4 volts for the amps????? ..or is it all about the alternator amperage?..someone school me plz..heh That's why you buy amps rated at 12v.. Yes 14.4 gives you more amp power but with a legit amp you can dip in the 12v range and still get rated power Quote my logshttp://www.stevemead...-my-new-set-up/my blow through loghttp://www.stevemead...future-updates/ 96 ss http://www.stevemeadedesigns.com/board/topic/164094-96-impala-ss-build/ Link to comment Share on other sites More sharing options...
Kyblack76 Posted July 7, 2015 Report Share Posted July 7, 2015 (edited) a lot of vehicles dont even charge over 14v.... EDIT - hell even AT 14v for that matter your over thinking this..... Edited July 7, 2015 by Kyblack76 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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