[urq] Elec usage needs (x-post)

djdawson2 at aol.com djdawson2 at aol.com
Tue Sep 5 14:21:12 EDT 2006

Add up all the wattages of the significant players, then divide by 13.5 (typical alt output voltage), and that will give you the total amps required.
A 90 amp alternator should optimally be able to handle about 1200 watts of gear before it starts to draw on the battery for backup.
-----Original Message-----
From: brogers at terrix.com
To: 200q20V at audifans.com; urq at audifans.com
Sent: Tue, 5 Sep 2006 10:00 AM
Subject: [urq] Elec usage needs (x-post)

In the middle of swapping the alternator over to the drivers side to
make room for a 944T intercooler, mounting it (the alt) to the 2B
bracket under my A/C compressor.  Looks like I have to use the 4kq/CGT
alternator instead of the 200 20V alt - bummer since the 4kq one is only
90 A instead of 120 A.  I went to a local place to have the 4kq
alternator rebuilt and hopefully upgraded to 120 A.  They said
Anybody know differently?  I am ok with swapping all internals but I
must retain the mounting housing.
I am also trying to get a real handle on electrical component
requirements - any input appreciated.  Here is my list of components -
several have different stages of use (ie fans, etc) so any knowledge on
the usage range would be very helpful - 
I am very very curious what the usage is for the the Cooling Fan Stage 1
and  _especially_ Stage 2...
headlights low 160 W
brights  400W I think
all other lights (dash, tail, parking etc)  - ?
Cooling fan (200 20V) Stage 1 - ?
Stage 2 ?
Stage 3   500W I think - luckily never needed so far!
blower motor (off plus 4 settings)
heated seats (6 settings)
rear defrost
wiper motor
stereo  135 W
Motronic ECU   ?
forgetting anything major?
thanks a ton!
'84 urquattro 20Vt
'01.5 S4
'98 A4 1.8Tq
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