ryan135 Posted May 12, 2010 Report Share Posted May 12, 2010 ok so heres the low down... i recently bought a 300 amp ho alternator from iraggi and took it to a local shop to get it tested, just to see if they could... they told me it was a 135 amp alternator :s i was like ok w/e there machine cant test this alternator so i just ignored that... so then he goes on to tell me that this alternator housing is off of a lexus (i bought it for a 95 civic) and then proceded to get a lexus alternator off of the shelf at his shop... and compared them both. now i have faith in dom not to rip me off thats not the problem but the looked IDENTICAL (from the outside) the coils looked the same housing mine had very minor machining so that one bolt could wrk with my bracket. now with all thats said how does a ho alternator work cuz i thought the coils made the current and if they look the same how can mine produce 300 amps?? Quote Link to comment Share on other sites More sharing options...
Neo_frog Posted May 12, 2010 Report Share Posted May 12, 2010 Your case has nothing to do with the output. I have a case from a GMC truck in my PT Cruiser. http://www.stevemeadedesigns.com/board/topic/38226-how-an-alternator-works-the-best-vid-ive-seen/ Quote Need an install? Hit me up.[email protected]Got car audio questions? Check here first!Everything you need to know. =]http://www.stevemeadedesigns.com/board/topic/83029-everything-you-need-to-know/ Link to comment Share on other sites More sharing options...
Neo_frog Posted May 12, 2010 Report Share Posted May 12, 2010 The majority of the machining is in the brackets. He doesn't do much with cases if he doesn't have to. Quote Need an install? Hit me up.[email protected]Got car audio questions? Check here first!Everything you need to know. =]http://www.stevemeadedesigns.com/board/topic/83029-everything-you-need-to-know/ Link to comment Share on other sites More sharing options...
HHR Ed Posted May 12, 2010 Report Share Posted May 12, 2010 The case doesnt matter. The internals is what matters. Larger diodes, more windings. If you open it up and compare, you can see. But you will mainly see the difference when you test it. 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...
David78 Posted May 12, 2010 Report Share Posted May 12, 2010 just like how people put gm in ford and vice versa. a guy tried selling me a gm case alt and showed me how it worked, it is real fascinating tbh. Quote ...............................____ ...............__________|___\____ ..;.;;.:;:;.,;.|__(O)____|____/_(O) 1978 F-150 Ranger Lariat 2 Sets of Sound-stream Components Sony Head-unit DDM Tuning 8000k's Euro Headlights (Projectors Soon) Green Led Wheel Wells Dark Red Tails Tint Link to comment Share on other sites More sharing options...
ryan135 Posted May 13, 2010 Author Report Share Posted May 13, 2010 ok thank you guys for giving me insite on the case problem... but both the coils look the same? is there obvious difference between the coils? Quote Link to comment Share on other sites More sharing options...
moredbs Posted May 16, 2010 Report Share Posted May 16, 2010 ok thank you guys for giving me insite on the case problem... but both the coils look the same? is there obvious difference between the coils? im not an expert, but i believe that maybe there is a difference in the way its made to spin. it may spin faster creating more current?also what i have been told buy many manufactures of alts,is you have to look at the output at idle. just like amps, look at rms not max. i have a 275amp alt but it only does 140 at idle.always ask for the idle output before you buy,you may never achieve the 300amps but its possible thats why they advertise it that way. Quote Link to comment Share on other sites More sharing options...
Neo_frog Posted May 16, 2010 Report Share Posted May 16, 2010 The amps at idle are inversely proportional to the max amps. Generally alts are rated by their output at 2000 engine RPMs. The smaller pulleys spin much faster than the engine and spin differently on different vehicles. The link in my first post shows a video of how the alternator works. I suggest everybody watch it. Quote Need an install? Hit me up.[email protected]Got car audio questions? Check here first!Everything you need to know. =]http://www.stevemeadedesigns.com/board/topic/83029-everything-you-need-to-know/ Link to comment Share on other sites More sharing options...
IH8PunkRok Posted May 16, 2010 Report Share Posted May 16, 2010 The amps at idle are inversely proportional to the max amps. Generally alts are rated by their output at 2000 engine RPMs. The smaller pulleys spin much faster than the engine and spin differently on different vehicles. The link in my first post shows a video of how the alternator works. I suggest everybody watch it. so a 300 amp alt will make 1/300th of an amp at idle? haha sorry i think that terminology was a bit off Quote -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
IH8PunkRok Posted May 16, 2010 Report Share Posted May 16, 2010 foot in mouth. i just got it smaller alts will produce more output at idle than larger amps sorry for doubting you Neo haha Quote -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
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