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Post by crash and burn on Oct 24, 2008 4:52:57 GMT -5
I'm guessing this is a first here(or for any sr for that matter)but I'm looking at adding warning lights and a siren to my sr and I need to know how much juice I have availible to work with. Now as I understand it the stator puts out around 11 amps @ 5k rpm(anybody know what it puts out at idle?) and I have a 7 amp battery(will the charging system suport a higher cap. one?) so would I be corect to assume that I have 18amps minus headlight and taillight draw to work with when the motor is running at 5k?I know amp hours figure in here somewhere so the kind of draw(not inc. head or tail light draw) I'm looking at are: approx. 12-14amps(peak) for 2-10 min(driving). and the posibility of 4-6amps at idle if I had to block traffic with the bike.
Anybody got any advice or formulas to help me keep from frying my charging system like I tend to do on my cars.
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Post by bigshingle on Oct 24, 2008 9:34:59 GMT -5
Wonder what the neighbors are going to think of that.
An SR with a siren and flashing lights may do more to real estate values than a crack house.
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Post by sjef on Oct 24, 2008 10:19:47 GMT -5
Hallo,
do not forget the capacity of the rectifier. till 92 it is max 15A
after 93 it is max 20a
regards sjef
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RD
Full Member
Posts: 176
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Post by RD on Oct 24, 2008 17:15:39 GMT -5
This should help when the bikes on fire due to overflowing fuel, you will be able to make to the station house faster.
Sorry but I couldn't resist, one FF to another.
Cheers
Rich
ps are you going to the WPFG in Vancouver 09.
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Post by crash and burn on Oct 24, 2008 20:42:04 GMT -5
Funny Rich, I got a real chuckle out of that one. And I don't think I'll be making it to Vancouver I have too much going on and don't forsee having the spare time to travel.
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THUMPS
Junior Member
THUMPS, ridden by Dave
Posts: 92
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Post by THUMPS on Oct 24, 2008 21:13:52 GMT -5
I assume that you are an EMT and only need your fancy stuff once in a while.
Your battery can put out 7 ah which means that it it can put out 7 amps for one hour theoretically. It can put our a lot more for a few minutes. The head and tail light use about 6 amps Your ignition does not use anything as it has a separate system.
If your emergency lights use 12 A, your peak is about 18A which is more than the output but your battery can supply current and maintain voltage for a while. I doubt if you will need your horn or blinkers when you are lit up like a Christmas tree.
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Post by davedunsboro on Oct 25, 2008 8:23:17 GMT -5
You should be able to use LEDs & an electronic type siren/sounder at a fraction of the amps that your looking at using. I think the headlight alone draws 5 amps off the system ! I've been caught before putting a 100w lamp in & the battery will go flat within a hour or two ,so 18 amps is an impossible ask unless you beef up your system & this maybe an expensive/difficult task anyway.Cheers Dave
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Post by crash and burn on Oct 25, 2008 22:25:15 GMT -5
That figure is using LEDs 4.5amps for 6 and the lowest draw m/c siren I can find is 8amps
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