clouduz

well, rpm's don't jump at all if it's sitting at idle 600 engine rpm it doesn't move at all, just voltage starts to go down needle doesn't move. let me go back and look at the service manual to make sure i read the min alt current needed

well, the whining is brief about 30 secs to a min and only when i haven't started it in a while. As for pulling current at idle, shouldn't when i'm NOT running anything like I said in a previous post, stock gave better voltage at idle. that's with or without running anything. With my mechman voltage slowly drops and drops until i revv it some not fun when it's hot and I want to run the a/c I have to keep it revved to about 800 to keep it at 14.2 volts, stock stayed at 14.3 without revving. and i'm almost sure it's not slipping, i have no problem putting on a shorter belt if it'll defintely help i'm just worried if it will be too tight and eventually pop b/c the pulley on stock and mechman are same size. Stock pulley was small to begin with

i'll call but i'm sure i asked them about a smaller pulley before and i believe i have the smallest available

hey hey come on now guys, trying to get some help.

crap i knew i should have gave more information. Okay, Big 3 done in 1/0. Have 2 1/0 going from alt to battery and 1 1/0 ground alt to ground battery. Yes voltage drops when I roll down the windows. Pulley on mechman alt is the same as stock, mine was small to begin with. I understand about the rpm thing I did the conversion you know 1800/3 = 600 engine rpm. It's 07 Hyundai Santa Fe SE. looked at the service manual and it says 65a min, it does meet the cars requirement but voltage sucks at idle And no, at idle have nothing running ex. no lights, door open, radio. etc sometimes i hear the alt making this whine? until it warms up then the noise is gone. so even if the pulleys are the same size would a smaller belt help any? No belt is not even close to being worn and battery is almost 2 years old and other battery about 1 year. Have 1/0, 4g, and 8g going to back battery lol don't ask had it laying around so figured couldn't hurt. and back battery grounded to front battery.

wow nothing?

Okay, I got a 250A rhino at idle voltage is about 14.5 until it warms and if i just let it sit there it drops gradually to about 13.2-12.8 depending on how fast i notice it and how long its been idleing. Like I can't let it idle with the A/C on without voltage dropping into the low 13s Now if i revv it to about 750-800 it'll go to about 14.3-14.4. My car idles about 600, is the voltage low because it doesn't idle at 800 like some cars? Stock alt would stay at about 14.2-14.4 SAME conditions. Would a shorter belt help any? And no the belt doesn't feel any looser than the stock one. Trying to give as much info as possible, according to the dyno sheet stock alt at idle speed gives 83.4 amps and mechman gives 68.4 I think I don't get enough idle amps b/c revving voltage goes higher. I read a topic in DC Power guy having a similar but not the same issue and suggested he get a new belt b/c of slippage. My belt isn't old or worn though but if spending $30 on a gatorback will help let me know. If so, how much shorter? I just want to have voltage idle at 14.2+. YES I have 2 batteries and they were fully charged. It's been like this since i had it.

any word on estimated speed to get that high?