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  #121  
Old 02-09-2009, 09:40 PM
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Originally Posted by TX.X-30 fan View Post
Is this thing on???????


Do you have me on ignore????


Its in the engine spec part of the owners manual, and my 04said 70!!!!
"Me, me, me- it's all about me!" Stuart.

Lighten up, Francis. I started to post and couldn't finish until after you had added yours, so I didn't know about your info.
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  #122  
Old 02-09-2009, 09:42 PM
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I think they came with 8 ga, so I would probably go to 6 ga. Yeah, it can be a PITA but it avoids problems.
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  #123  
Old 02-09-2009, 09:47 PM
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jim you don't think i'll have issues with the 70 amp alternator do you? i'm not the guy that goes around blasting his stereo all day, but i would like to feel confident that i can listen to it at reasonable to loud volumes a couple times a year on houseboat trips and such without ruining my alternator, or hanging out and listening, starting, cruising, listening, etc.

the larger 1000W amp is supposed to be super efficient, class G/H
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  #124  
Old 02-09-2009, 09:59 PM
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"i'm not the guy that goes around blasting his stereo all day, but i would like to feel confident that i can listen to it at reasonable to loud volumes a couple times a year on houseboat trips and such without ruining my alternator, or hanging out and listening, starting, cruising, listening, etc."

"it will be 1000W RMS on one amp (200x2@4ohms and 600x1@4ohms) and ~400W RMS (200x2@2ohms) on the 2nd. i'll never see that kind of output though. the smaller amp is a class AB and the larger one is a Class G/H amp with regulated power supplies and fans."

If I hear your stereo up here, I will publicly post it here.

Measure the voltage drop at the battery when you start the motor and turn all of the accessories on. If it drops more than a few volts, adding current draw will only make it worse. At higher RPM, it does produce more voltage and current but you need to deal with the draw at idle in order to not cause it to drop too low.

What is the total of the fuse values on the amps?
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  #125  
Old 02-09-2009, 10:01 PM
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how about if u are using a battery isolator do the batteries still need me be the same then or is it ok to use different ones?
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  #126  
Old 02-09-2009, 10:05 PM
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the larger G/H has (4) 30 amp and the smaller AB amp has (1) 30 or 40 amp, i'd have to look again, it's not on their specs.
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  #127  
Old 02-09-2009, 10:12 PM
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Quote:
Originally Posted by JimN View Post
"Me, me, me- it's all about me!" Stuart.

Lighten up, Francis. I started to post and couldn't finish until after you had added yours, so I didn't know about your info.


Could you see my bloomers under that tennis shirt??
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Myself I'll live on the edge and surf without a helmet.
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  #128  
Old 02-09-2009, 10:17 PM
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Originally Posted by brucemac View Post
the larger G/H has (4) 30 amp and the smaller AB amp has (1) 30 or 40 amp, i'd have to look again, it's not on their specs.
So, at 1/2 of worst case current draw, they could draw 50A-70A by themselves. If you're running at idle, your fuel pump, ECM, ignition system, lights and any other accessories could be drawing 25A-40A. The math doesn't make it look good for a 70A alternator. The batteries will fill in as a reserve tank but once they need to be recharged, it adds to the load.
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  #129  
Old 02-09-2009, 10:18 PM
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Could you see my bloomers under that tennis shirt??
I wondered what the pink reflection was when I looked at the sky.
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  #130  
Old 02-09-2009, 11:00 PM
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Originally Posted by 07Pro-V View Post
how about if u are using a battery isolator do the batteries still need me be the same then or is it ok to use different ones?
If they're not in the same condition, one will always be an additional load.
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