View Full Version : advantages of high amp alternators

02-19-2007, 08:20 AM
hey guys. I will be changing my alternator in another month. I was thinking about getting a high amp (170 amp) alternator for it. What are the advantages of having one of these other than more juice for my sound system? Thanks in advance.

02-19-2007, 02:10 PM
Well, that's really the only advantage.
More juice...

I believe more drap on the belt too, but I could be wrong.

02-19-2007, 02:35 PM
i would think the stock one is good enough.

02-19-2007, 02:47 PM
I'm not sure about the earlier gen's but my model has a stock alternator rating of 80 watts... That's normally fine but when you put a large load on it consisting of multiple amps, it's generally a good idea to upgrade. I personally have mine rated @ 200 watts due to my 4-amp setup however 150-180 is fine for typical setups. I know of no other benefits of a HO alternator than the one I mentioned with the exception of reducing load on other electrical devices when one is cranking a heavy system


02-19-2007, 05:18 PM
Its primarily used in conjunction with meaner sound systems.

I want one for my Celica.

02-19-2007, 07:20 PM
well, my setup will end up being (1) 400W, 4channel amp for inside speakers ( 1 channel per speaker) and (1) 400W, 2 channel amp for my 12" sub. that's still only 800W. should i go w/ HO or stock? (looks like if i go HO, for 6th gen it's 170W)

02-19-2007, 08:33 PM
do you have a cap? if not i would recommend getting a 1.0 farad capacitor. you can find them ranging from about $80.00 up to about $200.00 depending if you want a digital read out display or not and go from there. i have a 5th gen celica and i am running a 1000w RMS alpine amp on two 12's and a 400w RMS 4 channel rocksford amp with a 1.0 farad cap.

02-20-2007, 12:28 AM
no i don't have a cap. I sold my old one. it was 1.0 farad digital. when i'm having them installing my second amp, i'll see what kind of deal they can hook it up w/ on the cap.

02-20-2007, 12:46 AM
Caps are worthless and nothing more then a bandaid...once it discharges it's nothing more then another load on the electrical system.

I may get in touch with powermaster and see how expensive it would be to get a high output alt wound.

02-20-2007, 01:16 AM
you also could look into a batt cap. i am not sure if that is the correct name but it works way better then a cap. and caps work because i have one of the louder systems in my town and i didnt have a cap in the beginning. i didnt say it would solve the problem but it will help. if you are going to purchase a HO alternator dont go with a cheap one because i did that and they dont hold up. i am on my 3rd one and none of them will cahrge at idle

02-20-2007, 01:28 AM
where are you guys finding your high output alternators....and what kind of price range are we talkin here

02-20-2007, 01:33 AM
I've ran powermaster alts for years, not sure if they can do one for our cars or not. I'll post some info and let yall know.

Their website is www.powermastermotorsports.com

02-20-2007, 02:50 AM
idk what alternator i am running in my celica now. i bought it off ebay and it is considerably bigger than the stock one. i have had it rebuilt again and no one can tell me what type it is. there guys is like gmc or something but all of the plugs are the same as ours. i bought a HO alternator from an alternator shop in yakima for $360.00 and it didnt work for crap. didnt charge at idle and didnt put out the amps it said it did. the oversized one i have now puts out about 150 amps running but it wont charge at idle either. westbay said they can get one that charges 70 amp idle and 170 running but it is $650.00 and i have justified spending that yet.

02-20-2007, 02:53 AM
the case is considerably bigger