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Topic: 2007 Sprint ST Alternator Output  (Read 2137 times)
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crispiegee1
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« on: May 10, 2007, 11:24:11 AM »

I read on another thread that the Honda VFR800 has 80 watts of additional alternator output than the Sprint ST.  So what is the Sprint ST's alternator output?  

And just out of wondering, does anyone know the Daytona 675's output?  

It's nice to be able to plan for farkle, so I'd like to do this research ahead of time.
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« on: May 10, 2007, 11:24:11 AM »
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Rincewind
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« Reply #1 on: May 10, 2007, 11:55:46 AM »
35-amp, same as the Speed Triple and Tiger.   Embarassment  The Tiger is 38-amp-hours, I'm not sure about the others.
« Last Edit: May 10, 2007, 05:24:26 PM by Rincewind » Logged
crispiegee1
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« Reply #2 on: May 10, 2007, 01:54:38 PM »
What does that compute to in watts?
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« Reply #3 on: May 10, 2007, 02:22:11 PM »
Quote from: crispiegee1 on May 10, 2007, 01:54:38 PM

What does that compute to in watts?

Well.. watts = amps * volts
                    35        12  = 420
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« Reply #4 on: May 10, 2007, 03:19:43 PM »
Quote from: Rincewind on May 10, 2007, 02:28:34 PM

Though the system is 12-volts, I believe it runs closer to 14-volts.  

The figure I have heard in terms of max is 480-watts (that would be at 13.7 volts).  

The OEM farkle circuit for the accessory socket, GPS, and heated grips is 10-amps.




The GPS is its own 2 amp circuit.

Grips and power port do share the 10 amp circuit.
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« Reply #5 on: May 10, 2007, 08:39:31 PM »
Quote from: Rincewind on May 10, 2007, 05:28:39 PM

I checked my Tiger manual and it said 38-amp hours.  Sorry for the bad info - I re-edited my posts.   Embarassment


The ampere-hour rating of the battery has nothing to do with the alternator output.

Quote from: Rincewind on May 10, 2007, 02:28:34 PM

Though the system is 12-volts, I believe it runs closer to 14-volts.  

The figure I have heard in terms of max is 480-watts (that would be at 13.7 volts).  

At 12-volts, a 38-ah battery will produce 456-watts.  

The OEM farkle circuit for the accessory socket, GPS, and heated grips is 10-amps.




38 ampere-hours multiplied by 12 volts equals 456 watt-hours, not 456 watts.  Again, this is a measure of battery capacity, not alternator output.
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« Reply #6 on: May 11, 2007, 06:46:55 AM »
I had posted this on a different thread but similar dialog, though it seems more appropriate here... so, has anyone had issues running the heated grips, a heated vest and the PIAA type lights?  With all the talk about low alternator output I am a bit concerned about adding the lights to this load...

TGIF!
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« Reply #6 on: May 11, 2007, 06:46:55 AM »

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crispiegee1
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« Reply #7 on: May 11, 2007, 07:55:03 AM »

I had the same concern.  I don't own any heated clothing now, but I plan to get some in the future.

Additional lighting is a must.

It disappoints me that the Sprint's alternator is significantly less powerful than the Honda VFR.   Sad   I may not need the extra, but it's nice to have that additional margin.
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roughcut
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« Reply #8 on: May 11, 2007, 08:48:42 AM »
According to the Triumph service manual the 05 and later sprint ST has a 35 amp alternator. A 10amp hour battery. You all can do the math.
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