rocking.that.eclipse Posted December 8, 2012 Report Share Posted December 8, 2012 I was sitting in class the other day looking at specs of my car and I was wondering what the hp loss was from having a Mechman alt? I was wondering if there is some formula or a good way to estimate this. I have a 220 amp alt BTW Quote Link to comment Share on other sites More sharing options...
Sanitarium Posted December 8, 2012 Report Share Posted December 8, 2012 how much drag does wind have on a tree? how much power does a computer draw? how bright is a camp fire? too many variables to answer or even efficiently calculate. Quote Link to comment Share on other sites More sharing options...
rocking.that.eclipse Posted December 8, 2012 Author Report Share Posted December 8, 2012 Is there a way to ball park it? It's just something I am curious about. Quote Link to comment Share on other sites More sharing options...
Sanitarium Posted December 8, 2012 Report Share Posted December 8, 2012 ball park my questions... Quote Link to comment Share on other sites More sharing options...
rocking.that.eclipse Posted December 8, 2012 Author Report Share Posted December 8, 2012 ball park my questions... Touche Quote Link to comment Share on other sites More sharing options...
poorfish88 Posted December 8, 2012 Report Share Posted December 8, 2012 Amps x Volts = Watts Watts / 745.7 (one HP) = Electrical HP Produced by the Alternator HP x 15% Efficiency Loss = HP Loss HP + HP Loss = Total HP Used Example: 57A x 14.9V = 849.3 Watts 849.3 Watts / 745.7 = 1.14 HP 1.14 HP x 15% = 0.17 HP 1.14 + 0.17 = 1.31 HP Total I found this on the net. I have no idea how accuate it is. Quote Link to comment Share on other sites More sharing options...
EdgarG0721 Posted December 8, 2012 Report Share Posted December 8, 2012 If your worried about loosing h.p. the weight of the system will affect more then ur alt. Quote Link to comment Share on other sites More sharing options...
MECHMAN Posted December 8, 2012 Report Share Posted December 8, 2012 It actually depends on the electrical load on the alternator. When the vehicle is running with no additonal electrical load against the alternator, it will consume the same amount of HP as your stock alternator. The more amperage you draw from the charging system, the more HP is required to turn the alternator. When putting out Max 220 amps, it will require about 5 hp to turn. The less amperage you use, the easier it is to turn. Quote 1-888-MECHMAN www.Mechman.com [email protected] Link to comment Share on other sites More sharing options...
01VWGREENMACHINE Posted December 8, 2012 Report Share Posted December 8, 2012 (edited) Thanks Mechman i was wondering that my self. *sorry to thread jack* so a ballpark would be somewhere around 40 to 44 amps per hp?? Edited December 8, 2012 by 01VWGREENMACHINE Quote http://www.stevemead...f-system-build/ 2001 VW GTI with a 1.8T motor BIG 3 Pioneer AVH-4200DVD DOUBLE DIN HEAD UNIT 6 - 4 VOLT PREOUTS RF T1500-BDCP (running at 2 ohm) RF T400.4 RF T1 D212 x2 (in ported box) RF 1/0 TO 4 GAUGE distribution block x 2 all stinger wires 200a alternator (SINGER ALT) RF T2652-S (6.5 MID BASS AND 1" TWEETS in front and rear) KINETIC HC 800 BATTERY (Front) KINETIC HC 1200 BATTERY (BACK) 120ft of 1/0 stinger blue and clear matt 20ft of 4 gauge stinger blue and clear matt 30ft of 8 gauge stinger blue and clear matt 100ft of 12 gauge stinger speaker wire black Link to comment Share on other sites More sharing options...
Blackedout Posted December 9, 2012 Report Share Posted December 9, 2012 220a x 14.6v = 3,212 watts 3212 watts / 745.7 watts per hp ~ 4.3 hp Tack on the efficiency. Puts you somewhere close to 5hp Quote Trunk Build Log Link to comment Share on other sites More sharing options...
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