right... But how often is the oil light on? Blinkers? And if you replace alot of those with led (think about also replacing the speedo and tach lights as well) and im talking true led replacements. No resistors...... you could save up enough wattage for a vest or jacket....
-----Original Message----- Date: Thursday, October 14, 2010 10:58:40 am To: [email protected] From: "Javier Garcia" <[email protected]> Subject: Re: [Nighthawk Lovers] Re: How cold is too cold? Ok, here is the full list of the specs in the electrical section of the 750: * Alternator charging coil 0.4 - 0.6 ohms Alternator field coil 2.1 - 2.6 ohms Regulator / rectifier regulated voltage/amperage 13.0 - 15.0 V/below 0.5A/2,000 rpm Battery capacity 12V - 14 Ah* *Normal Batt charging rate 1.4 A / 10h** Main fuse 30 A** **Other fuses 2 x 10 A, 1 x 15 A* *Headlight (high/low beam) 12 V 60/55 W* *Tail / brake light 12 V 3/32 CP* *Rear turn signal/light 12 V 32 CP* *Front turn signal/running light 12 V 32/3 CP* *Side stand warning light 12 V 3 W* *High beam indicator light 12 V 3 W** **Oil warning light 12 V 3 W** Turn signal indicator light 12 V 3.4 W **Neutral indicator light 12 V 3 W* I don't understand why in some cases, like the tail light, there is a CP next to the number. If we assume this is the load from each item in watts, the total comes out to be 171.4 W. This means 216w - 171.4w (continuous load) = 44w "reserve" capacity Bearly enough to connect a pair of gloves, each one drawing about 15w. Doesn't look too good. Javier. * * On Thu, Oct 14, 2010 at 12:06 AM, Kurt Nolte <[email protected]>wrote: > 240 watts seems fair, 20 amps @ 12v. I'd go with 90% of that figure, > or 18 amps continuous output. > > You can draw on the battery for momentary bursts, such as you might > encounter during braking or turn signals, so those can be discounted > from your running total. Thus, my own equation would look more like > this: 60w + 8w + 16 (2x running lights) + 8w + 3.4w +15w (extra > resistance, ignition computer) = 111w continuous load. > > 18*12=216 watts > 216 - 112 (continuous load) = 104w "reserve" capacity > > If you are going to regularly run close to your full alternator > output, give a thought to possibly adding some capacitors in parallel > with the alternator output. This will allow you to better ride out > those momentary peaks, with an added benefit of providing a little > "smoothing" of the electrical signal as well. > > Also, 240w roughly equates to a third of a horsepower, so you'll > probably suffer a little loss of fuel economy, on top of the usual > winter hit. > > -Kurt > > On Wed, Oct 13, 2010 at 10:32 PM, Allen <[email protected]> wrote: > > Javier, while I was not able to find the amp rating for our version of > > the NH, I did find plenty of stats for other bikes. Most MC > > alternators are 20 - 30 Amp, the old SOHC CB750 had an 18 amp unit, > > and some Harley versions go up to 50 amp. Anyway using 20 as an > > estimate (I assume ours is better than a 1969-1978 version) you should > > have 240 watts to play with. > > > > According to a 1980 Suzuki GS1100 shop manual light bulb wattage > > specs: > > headlight 55/60W > > tail 8/23W > > turn signals 23W > > license plate 8W > > speedo/tach/indicators 3.4W > > So with highbeams, brake, 2 turn signals, license plate, speedo, tach, > > highbeam indicator, turn signal indicator I would guess it would be: > > 60+23+23+23+8+3.4+3.4+3.4+3.4=150.6W > > > > So 95% of 240 is 228 - 150.6 = 77.4 watts reserve. > > > > Sorry that is the best I can do, there isn't much info out there. > > > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<nighthawk_lovers%[email protected]> > . > For more options, visit this grou -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
