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05 ford f350 alternators


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biggfe 
Member - Posts: 6
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Joined: March 26, 2008
Location: Texas, United States
Posted: December 28, 2011 at 2:20 PM / IP Logged  
I got a 05 Ford F350 Daully. Alternator went out and im thinking of replacing it with the higher output one. The standard size alt. is 110 amp.Im thinking of replaceing it with the higher output alt 135 amp. I have two amps one 200 wattts and one 700 watts also 7" dvd screen with navi and siriurs... any thoughts....
biggfe
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: December 29, 2011 at 11:44 AM / IP Logged  
Higher output is always better, IMO.  Make sure you upgrade the big 3 if the OEM wiring can't handle the extra potential.
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biggfe 
Member - Posts: 6
Member spacespace
Joined: March 26, 2008
Location: Texas, United States
Posted: December 29, 2011 at 6:06 PM / IP Logged  

All ready did big three.... And installed the new higher output alt today.... Everything is running just fine.... bass seems to hit a little harder.... Thanks

biggfe
oldspark 
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Joined: November 03, 2008
Location: Australia
Posted: December 30, 2011 at 12:15 AM / IP Logged  
Your amps if RMS Watts (watt else?) mean an extra 90A at full blast.
Not that that means you need a bigger alternator from a battery POV (ie, as long as it charges and discharges within limits so the battery has recharged sufficiently by drive's end), but burp power increases with a bigger alternator.
The latter is demonstrated by your new 135A alternator ie,
biggfe wrote:
bass seems to hit a little harder....
Yes - you have up to 25A extra available, hence at least another ~250W of power before the alternator overloads and the voltage drops from say 14.2V anywhere down to ~12.5V (which may mean at least 20% lower output compared to 14.2V).
Only if high power voltage dips become unwanted is a bigger alternator required.

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