Cj Kumz Posted May 25, 2014 Report Posted May 25, 2014 Hey guys. I hear alternators do not produce there rated amps unless your rpm is on the high. Is this true?? And is there a way to know or calculate the amps an alternator produces at idle. Say for a 120A alternator?? Vw Polo Pioneer Deh-6050UB Sundown Saz-3500d DD Audio 9500 15'' 5.5 cubic feet box with 10 inch port @ 38hz I live to hear the Bass drop!!!
jdshott Posted May 25, 2014 Report Posted May 25, 2014 Yes most alts have to be running between 1200 RPM and 2000 RPM depending on manufacture , to reach full output . the manufacture could have a 120 amp alt putting out 60 Amps @ idle . there is a way to load test and alt with the right tools . you need to research this a lil more . to many variable factors to just guess. No 1 But me paid for this stuff and NO FREEBIES so no brand names (No Free Advertisement ) A SQ head unit 6 5.25 2 X 6x9s 7804 P400.4 4001D 1 34s (Maybe time to change brand) 4 X 15" s !/0 @ 2/0 OFC Wiring :morepower1: :morepower1: ill say it like i always say it. F##K the DD-1. I don't care if you or anyone buys one. (well i do, but that isn't my point) Get an O-scope in the very minimum and learn how to use it or you are just guessing your settings like every other noob. once you master the O-scope then step up to a DD-1 or even better a DD-1 Plus.
Kyblack76 Posted May 25, 2014 Report Posted May 25, 2014 All would depend on the alt turn on set rpm wise. That would involve crank and alt pulley diameter. That changes with vehicle, and alts SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold
Cj Kumz Posted May 25, 2014 Author Report Posted May 25, 2014 Thanks guys. So on average it is about half the alt amp rating when on idle. And yah those testing methods sound so complicated. Lol. Anyway just wanted to know the idle so I can approximate what size battery I might need in the back. Thanks again. Vw Polo Pioneer Deh-6050UB Sundown Saz-3500d DD Audio 9500 15'' 5.5 cubic feet box with 10 inch port @ 38hz I live to hear the Bass drop!!!
Kyblack76 Posted May 25, 2014 Report Posted May 25, 2014 Put a clean, safe full tilt burp on, and clamp the alt. Do it at idle, and again at rev. SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold
hdorre Posted May 25, 2014 Report Posted May 25, 2014 So on average it is about half the alt amp rating when on idle.Psh, I WISH this was true haha.. Id have a 340A alt if it was But yea.. The way I would do it is with an ammeter/DC clamp meter.. Like how Kyle mentioned. 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
Kyblack76 Posted May 25, 2014 Report Posted May 25, 2014 So on average it is about half the alt amp rating when on idle.Psh, I WISH this was true haha.. Id have a 340A alt if it was But yea.. The way I would do it is with an ammeter/DC clamp meter.. Like how Kyle mentioned. Right. And the reverse of that, is, my new hair pin, is rated at 270 at full rev, but, at 240 at IDLE. You want idle, you sacrafice top end, and it works the other way. Ya cant have your beer and cake it to........ or whatever. Shitty video. We were drunk. But, i have a clamp on my alt, pretty much 85% of the time. Not to bad for a 3 phase. And HOT AS BALLS. Dont look at the TL, look at the FLUKE (yellow box) on the dash, right side. SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold
hdorre Posted May 25, 2014 Report Posted May 25, 2014 Ya cant have your beer and cake it to........ or whatever. 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
Cj Kumz Posted May 26, 2014 Author Report Posted May 26, 2014 Any idea if a 120A alternator and 2 70AH batteries would push a 2000rms amp?? Big 3 already done with 0 gauge Vw Polo Pioneer Deh-6050UB Sundown Saz-3500d DD Audio 9500 15'' 5.5 cubic feet box with 10 inch port @ 38hz I live to hear the Bass drop!!!
hdorre Posted May 26, 2014 Report Posted May 26, 2014 My stock 110A alt and 2 G24s (75aH each) were just fine for my 2000watts. 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
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