loudernu Posted September 20, 2010 Report Share Posted September 20, 2010 I installed my DC 260sp alt along with my stock alt the other day, and checked voltages. Prior to install, stock alternator only- 14.1 at battery car idling with no stereo, no A/C 13.8-13.9 at voltmeter in cab of truck with no stereo, no A/C After install, stock alt and DC Power alt- 14.1 at battery car idling with no stereo, no A/C 13.7-13.9 at voltmeter in cab of truck with no stereo, no A/C I checked the voltage coming out of each alternator, and the stock one is charging at 14.20 volts, the DC Power is charging at 14.07 volts. I am not bashing DC, I am just making sure that everything is kosher. The harness was pretty simple with the instructions from Kyle, the plug, a wire for ground, and a wire for switched power. I just wanted some help from you all, as most of you guys who have used DC alts, always talk about having voltages up to almost 15+, I kind of expected this as well. It does help some with a load on, but kind of expected to see a bigger difference. Maybe the relay could be bad or something? Quote Link to comment Share on other sites More sharing options...
n8ball2013 Posted September 20, 2010 Report Share Posted September 20, 2010 Have you upgraded your big three yet? 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...
Guest DC Power Kyle Posted September 20, 2010 Report Share Posted September 20, 2010 Also have you checked for belt slip? All of our Alts are set at 14.7 so either it's wiring, belt slip or a very discharged/dead battery. Quote Link to comment Share on other sites More sharing options...
loudernu Posted September 20, 2010 Author Report Share Posted September 20, 2010 It isn't belt slip, but it could be my yellow top battery. I have new batteries being delivered tomorrow, so I will update this after I install them, but thanks Kyle for replying so quickly. I will also double check my connections on the big three tomorrow as well. Quote Link to comment Share on other sites More sharing options...
UnderLoK Posted September 20, 2010 Report Share Posted September 20, 2010 always talk about having voltages up to almost 15+, I kind of expected this as well. It does help some with a load on, but kind of expected to see a bigger difference. Maybe the relay could be bad or something? For 15+ you have to run a VCM or MLA. Quote If at first you do not succeed, you are doing it wrong! -ARSCheck out my walled TBSS build over here4 Fi Team 18s on 2 Cactus K9 DS18 doors on 2 MBQ 1Ks, Vifa pillars on a STL4.500 Pioneer X8500 6 XS Power D7500, 1 3400S Second Skin 2 270a Mechman Alts Link to comment Share on other sites More sharing options...
treossi Posted September 20, 2010 Report Share Posted September 20, 2010 that's bullshit... ^^^^ my dc 270xp runs 15.6 volts and i have NO mla module or any other after market add on crap just alt and big three Quote Team sundownWESTCOASTSPL.COM we're throwing dbdrag events very soon visit the website for details Link to comment Share on other sites More sharing options...
Guest DC Power Kyle Posted September 20, 2010 Report Share Posted September 20, 2010 Our XP series GM regulators are set at 15.1 out of the box. SP GM regulators are set at 14.7~ Only way the voltage is that low is due to one of those. Keep me updated and if you have any problems feel free to call us at 888-441-0144. Quote Link to comment Share on other sites More sharing options...
UnderLoK Posted September 20, 2010 Report Share Posted September 20, 2010 (edited) that's bullshit... ^^^^ my dc 270xp runs 15.6 volts and i have NO mla module or any other after market add on crap That's great, but this guy doesn't have an XP and runs his w/ a stock alt. Edited September 20, 2010 by UnderLoK Quote If at first you do not succeed, you are doing it wrong! -ARSCheck out my walled TBSS build over here4 Fi Team 18s on 2 Cactus K9 DS18 doors on 2 MBQ 1Ks, Vifa pillars on a STL4.500 Pioneer X8500 6 XS Power D7500, 1 3400S Second Skin 2 270a Mechman Alts Link to comment Share on other sites More sharing options...
Socky Posted September 20, 2010 Report Share Posted September 20, 2010 Could be the battery, or his voltage regulator keeping him from charging that. Idk i will let the experts do there judgment here Quote Jeep Cherokee 4dr -4.75 in front, new rusty's 4.5 in rear leafs -micky thompson 35x14.50x15 -locker rear -Rusty's offroad Engine/transmission/transfer case/crossmember/gas tank skid plates -Warn front bumper with 8000lb winch -Custom rear bumper -Warrior product tube doors (summertime) -Optima redtop (starter) -26XK miles and still runs like a bat out of hell Kenwood H/U 1/0 wire, 136 amp alt 200 ah batteries 12.7 daily 2 Apsm 1500 @ 2 ohm strapped on zv3 d1 with ns softparts Mb quart 125.4 wired to 4 aura 6's 3.6 cube box tuned to 36 plays down to 23hz Link to comment Share on other sites More sharing options...
MECHMAN Posted September 21, 2010 Report Share Posted September 21, 2010 Or the engine could just be really hot... The higher the temperature of the regulator, the lower the voltage set point will go. Almost all regulators have a thermistor built in to them to lower charging voltage as temp increases to prevent overheating. Quote 1-888-MECHMAN www.Mechman.com [email protected] Link to comment Share on other sites More sharing options...
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