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05-24-2011, 08:15 PM | #1 |
advocatus diaboli
Drives: 07 Yaris hatch Join Date: Mar 2011
Location: San Jacinto California
Posts: 1,126
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Increase alternator output or adjust idle?
I bought a Rockford Fosgate T1 10" and tossed it in the Yaris with an Alpine PDX1.600. @ idle I'm losing a good amount of RPM's with each drop. I know it's normal for the Yaris to find the lowest idle possible for fuel consumption, and I also know the 80 amp alternator is so so(although I thought it would be enough for such a small car to add the stereo). I'm worried I will stall one day when the A/C is running, the cooling fan kicks on and the bass drops at a stop light or in LA traffic.
My question is, if I have my alternator re-wound to 160amp (or so) will I run into trouble with the excess juice...I mean how much more could the 600W class D mono amp need? I'm on the fence between the alternator, and messing with the idle. The battery is random auto parts store(without looking) it's probably 500 CCa or something similar. Eventually I'll swap the battery with something proper, the one in there is only about 8 months old and shows correct volts. Each of my other cars has a red top in it so I can pull one and see if it'll help, but I doubt it will. The other cars I did alternator work to had substantial systems so I knew the high output would be used up, the Yaris I'm not so sure about. Thanks.
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05-24-2011, 11:33 PM | #2 |
What about a "BIG 3"
I'm running 3 amps at the same time and I have no problems. D.
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05-25-2011, 01:59 AM | #3 |
Roadrunner Jr.
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We have drop in units at DC Power and a universal unit from powerbastards available.
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“To argue with a person who has renounced the use of reason is like administering medicine to the dead.” ― Thomas Paine |
05-25-2011, 02:44 AM | #4 | |
advocatus diaboli
Drives: 07 Yaris hatch Join Date: Mar 2011
Location: San Jacinto California
Posts: 1,126
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Quote:
Also, I upgraded my 10 to a Fosgate T1 this evening...sooo much better.
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05-26-2011, 11:43 PM | #5 |
Drives: 2009 Yaris Hatchback Join Date: Feb 2009
Location: NJ
Posts: 792
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If you're interested, I have a custom-made NST 10% overdrive alternator pulley for sale that might help you out
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05-27-2011, 01:42 AM | #6 | |
advocatus diaboli
Drives: 07 Yaris hatch Join Date: Mar 2011
Location: San Jacinto California
Posts: 1,126
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Quote:
Right now I'm losing about 300RPM on a steady low bass drop. I'm a heartbeat away from grabbing a junkyard alternator tomorrow and giving it to a local shop(who's done work for me before)...just worried about all the extra output. If I could get an answer to that I'd be stoked. Anybody??
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05-27-2011, 10:04 AM | #7 | |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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Quote:
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05-27-2011, 07:17 PM | #8 |
Roadrunner Jr.
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Out of curiosity, why would a battery help if it's not making the vehicle's power after it starts?
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“To argue with a person who has renounced the use of reason is like administering medicine to the dead.” ― Thomas Paine |
05-27-2011, 07:54 PM | #9 | |
advocatus diaboli
Drives: 07 Yaris hatch Join Date: Mar 2011
Location: San Jacinto California
Posts: 1,126
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Quote:
Awesome sauce. I bought a used alternator from the scrapyard(same place I found that other members car) and took it to the alternator shop. I asked for 120A(hopefully we're still good) and a 10% pulley. Ended up being 175.00(plus the 50.00 for the core)...should be ready by Wed.
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05-28-2011, 12:09 AM | #10 |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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The battery is basically a capacitor once the car is running. It keeps the voltage from sagging too far if the alternator can't source enough current. The problem is that the stock battery and alternator combo are sized for just the standard load. If you run equipment that draws more than stock, you will find that after starting the battery will take a few minutes or so to get back to a full charge.
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05-28-2011, 12:49 AM | #11 |
Roadrunner Jr.
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Indeed...at that point you're killing the alternator. This is why you should never have to even get to 12.6 Volts. If you're going to be slapping that much draw on the alternator, a battery is just a band aid...and another load for the alternator to charge.
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