Not enough Amps #2

JoeLansing · June 14th, 2011, 06:40 PM

A stock 5 watt CB radio takes 2-3 amps. I've seen 400 watts (don't know how many amps) done from a stock little Toyota Corolla just off the battery. How many watts/amps can you pull from a 250R battery if everything else is stock? Is there an easy way to push it up? What's the practical *cheap* limit? I know I could do 4 batteries and 2 alternators but I don't want to go there..

- Joe

JoeLansing · June 14th, 2011, 06:54 PM

Maybe this is why I haven't seen any 5' antennas on Ninjas yet? I want to think I'm the first genius to try it. But that's not likely. If I can put out 100W I'd be lucky. If I want to do more I need to use all LED bulbs and candles and maybe a kick starter?
- Joe

HKr1 · June 15th, 2011, 04:58 AM

You trying to put a CB and 100w linear on the ninja?

Momaru · June 16th, 2011, 03:23 PM

This thread may be of some use.

leed · June 16th, 2011, 07:53 PM

You could... Wire up another alternator in your drivetrain and run a separate battery.. But practicality and feasibility is minimal. Most small car (4-cylinders) alternators are less than 90 amps. Our Ninjettes fire two spark plugs, lights, and lack quite a few forms of heavy-current devices found on most cars. Not many amps.

Looking at the 'maximum' voltage of the devices on the Ninjette, alongside their wattage.. You're looking at working with less than 20 amps coming directly off the alternator. Don't take my word for it though, this is only an approximation based on some elementary equations. (P/V = I, P = 266 W, V = ~14V :. I = 19)

Maybe you could get an 'improved stator' to increase your output..

CThunder-blue · June 16th, 2011, 08:31 PM

Quote:

Originally Posted by leed

You could... Wire up another alternator in your drivetrain and run a separate battery.. But practicality and feasibility is minimal. Most small car (4-cylinders) alternators are less than 90 amps. Our Ninjettes fire two spark plugs, lights, and lack quite a few forms of heavy-current devices found on most cars. Not many amps.

Looking at the 'maximum' voltage of the devices on the Ninjette, alongside their wattage.. You're looking at working with less than 20 amps coming directly off the alternator. Don't take my word for it though, this is only an approximation based on some elementary equations. (P/V = I, P = 266 W, V = ~14V :. I = 19)

Maybe you could get an 'improved stator' to increase your output..

You're dead on the money. Manual states that Alternator output is 19 amps @ 5000RPM, 14v

JoeLansing · July 3rd, 2011, 02:44 PM

If I put a 2nd battery, lets say a small car battery on the back of the Ninja, in parallel with it's normal battery, would the alternator on it charge both it, and the internal battery? It's not like I'd talk all the time. Or would the radio pull it's watts from the bike's electrical system even though it's just connected to the 2nd battery? A 250W amp should draw about 18 amps on a 14V system, 22 on a 12V system. Can I pull that just off a 2nd battery, but still charge it on a 250R? Yes, I know this is dumb, but not any worse than the Super Charger thread, and this one won't last as long..

I guess I'm doing the equivalent of putting a "Thumpa-Boom-Boom" stereo on a Ninja, but only to use in short bursts.

- Joe

CThunder-blue · July 3rd, 2011, 10:21 PM

You will put a strain on the alternator when/if you add a second battery. Most audio installs that require a second battery also require a high output alternator. I'm not even sure how you would stuff a second battery on the bike without just strapping it to the back seat.

Momaru · July 4th, 2011, 03:20 PM

Quote:

Originally Posted by CThunder-blue

I'm not even sure how you would stuff a second battery on the bike without just strapping it to the back seat.

Airbox delete leaves quite a lot of real estate down there, right in front of the standard battery

Tony B · January 14th, 2012, 12:52 AM

Quote:

Originally Posted by JoeLansing

A 250W amp should draw about 18 amps on a 14V system, 22 on a 12V system

- Joe

The bike has a 12 volt system, the typical charging rate of an alternator is around 14 volts to ensure the battery is kept chatged. But only at the revs stated, lower rpm will result in lower volts.

Asspire · January 14th, 2012, 07:51 AM

maybe try using a battery isolator to charge the two batteries? dunno how well it would work on the bike, and it'll probably be a real pain to install.

June 14th, 2011, 06:40 PM	#1
JoeLansing ninjette.org member Name: Joe Location: Lansing, MI Ghetto Join Date: May 2011 Motorcycle(s): Green 2011 SE 52yo Geezer Posts: 122	Not enough Amps #2 A stock 5 watt CB radio takes 2-3 amps. I've seen 400 watts (don't know how many amps) done from a stock little Toyota Corolla just off the battery. How many watts/amps can you pull from a 250R battery if everything else is stock? Is there an easy way to push it up? What's the practical cheap limit? I know I could do 4 batteries and 2 alternators but I don't want to go there.. - Joe

June 16th, 2011, 03:23 PM	#4
Momaru ninjette.org certified postwhore Name: Paul Location: Roanoke, VA Join Date: Jun 2009 Motorcycle(s): 2008 Candy Plasma Blue 250R Posts: A lot.	This thread may be of some use. __________________________________________________ Proud member of the Blue Army

July 3rd, 2011, 10:21 PM	#8
CThunder-blue ModMy250.com Name: Tri Location: St, Louis Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.	You will put a strain on the alternator when/if you add a second battery. Most audio installs that require a second battery also require a high output alternator. I'm not even sure how you would stuff a second battery on the bike without just strapping it to the back seat. __________________________________________________ The www.ModMy250.com guy

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June 14th, 2011, 06:54 PM	#2
JoeLansing ninjette.org member Name: Joe Location: Lansing, MI Ghetto Join Date: May 2011 Motorcycle(s): Green 2011 SE 52yo Geezer Posts: 122	Maybe this is why I haven't seen any 5' antennas on Ninjas yet? I want to think I'm the first genius to try it. But that's not likely. If I can put out 100W I'd be lucky. If I want to do more I need to use all LED bulbs and candles and maybe a kick starter? - Joe

June 15th, 2011, 04:58 AM	#3
HKr1 IC2(SW) Name: Kerry Location: Pensacola Join Date: Nov 2008 Motorcycle(s): . Posts: A lot.	You trying to put a CB and 100w linear on the ninja?

June 16th, 2011, 07:53 PM	#5
leed ninjette.org sage Name: David Location: Loves Park, IL Join Date: Feb 2011 Motorcycle(s): Time will tell Posts: 969	You could... Wire up another alternator in your drivetrain and run a separate battery.. But practicality and feasibility is minimal. Most small car (4-cylinders) alternators are less than 90 amps. Our Ninjettes fire two spark plugs, lights, and lack quite a few forms of heavy-current devices found on most cars. Not many amps. Looking at the 'maximum' voltage of the devices on the Ninjette, alongside their wattage.. You're looking at working with less than 20 amps coming directly off the alternator. Don't take my word for it though, this is only an approximation based on some elementary equations. (P/V = I, P = 266 W, V = ~14V :. I = 19) Maybe you could get an 'improved stator' to increase your output..

July 3rd, 2011, 02:44 PM	#7
JoeLansing ninjette.org member Name: Joe Location: Lansing, MI Ghetto Join Date: May 2011 Motorcycle(s): Green 2011 SE 52yo Geezer Posts: 122	If I put a 2nd battery, lets say a small car battery on the back of the Ninja, in parallel with it's normal battery, would the alternator on it charge both it, and the internal battery? It's not like I'd talk all the time. Or would the radio pull it's watts from the bike's electrical system even though it's just connected to the 2nd battery? A 250W amp should draw about 18 amps on a 14V system, 22 on a 12V system. Can I pull that just off a 2nd battery, but still charge it on a 250R? Yes, I know this is dumb, but not any worse than the Super Charger thread, and this one won't last as long.. I guess I'm doing the equivalent of putting a "Thumpa-Boom-Boom" stereo on a Ninja, but only to use in short bursts. - Joe

January 14th, 2012, 07:51 AM	#11
Asspire Fix It Till Ya Break It Name: Asspyre Location: T.Dot Join Date: Oct 2011 Motorcycle(s): 08 250RRrrrr Posts: 623	maybe try using a battery isolator to charge the two batteries? dunno how well it would work on the bike, and it'll probably be a real pain to install.